./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-21.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_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/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_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-21.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/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_696958e6-aa25-44b3-b11f-6adf9de4461f/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 2acc76dfd00637187bc9b2eb9686759f995c141fc9bf4c322b891219416a3c16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:30:40,054 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:30:40,192 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:30:40,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:30:40,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:30:40,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:30:40,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:30:40,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:30:40,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:30:40,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:30:40,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:30:40,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:30:40,239 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:30:40,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:30:40,240 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:30:40,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:30:40,242 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:30:40,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:30:40,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:30:40,244 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:30:40,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:30:40,251 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:30:40,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:30:40,252 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:30:40,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:30:40,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:30:40,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:30:40,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:30:40,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:40,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:30:40,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:30:40,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:30:40,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:30:40,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:30:40,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:30:40,267 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:30:40,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:30:40,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:30:40,269 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:30:40,269 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_696958e6-aa25-44b3-b11f-6adf9de4461f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2acc76dfd00637187bc9b2eb9686759f995c141fc9bf4c322b891219416a3c16 [2023-11-12 02:30:40,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:30:40,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:30:40,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:30:40,582 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:30:40,583 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:30:40,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-21.i [2023-11-12 02:30:43,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:30:44,117 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:30:44,118 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-21.i [2023-11-12 02:30:44,143 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/data/6e792b044/502ce7d18f6d4893acef55fd49e50703/FLAGe615c9f11 [2023-11-12 02:30:44,156 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/data/6e792b044/502ce7d18f6d4893acef55fd49e50703 [2023-11-12 02:30:44,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:30:44,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:30:44,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:44,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:30:44,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:30:44,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272dccda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44, skipping insertion in model container [2023-11-12 02:30:44,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,222 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:30:44,384 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_696958e6-aa25-44b3-b11f-6adf9de4461f/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-21.i[919,932] [2023-11-12 02:30:44,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:44,469 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:30:44,483 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_696958e6-aa25-44b3-b11f-6adf9de4461f/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_dependencies_file-21.i[919,932] [2023-11-12 02:30:44,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:44,574 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:30:44,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44 WrapperNode [2023-11-12 02:30:44,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:44,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:44,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:30:44,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:30:44,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,678 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 166 [2023-11-12 02:30:44,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:44,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:30:44,683 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:30:44,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:30:44,693 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,723 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,747 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:30:44,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:30:44,771 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:30:44,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:30:44,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (1/1) ... [2023-11-12 02:30:44,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:44,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:30:44,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:30:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:30:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:30:44,893 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:30:44,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:30:44,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:30:44,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:30:45,036 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:30:45,038 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:30:45,539 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:30:45,545 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:30:45,545 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:30:45,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:45 BoogieIcfgContainer [2023-11-12 02:30:45,548 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:30:45,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:30:45,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:30:45,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:30:45,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:30:44" (1/3) ... [2023-11-12 02:30:45,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1caa46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:45, skipping insertion in model container [2023-11-12 02:30:45,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:44" (2/3) ... [2023-11-12 02:30:45,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1caa46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:45, skipping insertion in model container [2023-11-12 02:30:45,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:45" (3/3) ... [2023-11-12 02:30:45,561 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_dependencies_file-21.i [2023-11-12 02:30:45,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:30:45,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:30:45,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:30:45,632 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;@481058a9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:30:45,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:30:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 45 states have internal predecessors, (60), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:30:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-12 02:30:45,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:45,654 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:45,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:45,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash 30068924, now seen corresponding path program 1 times [2023-11-12 02:30:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:45,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794600339] [2023-11-12 02:30:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:45,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:45,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794600339] [2023-11-12 02:30:45,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:30:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662240099] [2023-11-12 02:30:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:45,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:45,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:45,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:30:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:46,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:30:46,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-11-12 02:30:46,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662240099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:46,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:30:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668888157] [2023-11-12 02:30:46,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:46,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:30:46,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:46,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:30:46,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:30:46,374 INFO L87 Difference]: Start difference. First operand has 69 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 45 states have internal predecessors, (60), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:30:46,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:46,407 INFO L93 Difference]: Finished difference Result 131 states and 224 transitions. [2023-11-12 02:30:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:30:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 141 [2023-11-12 02:30:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:46,418 INFO L225 Difference]: With dead ends: 131 [2023-11-12 02:30:46,418 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:30:46,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 140 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 02:30:46,426 INFO L413 NwaCegarLoop]: 95 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, 95 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 02:30:46,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:30:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:30:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-12 02:30:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:30:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 95 transitions. [2023-11-12 02:30:46,507 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 95 transitions. Word has length 141 [2023-11-12 02:30:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:46,508 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 95 transitions. [2023-11-12 02:30:46,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:30:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 95 transitions. [2023-11-12 02:30:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-12 02:30:46,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:46,513 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:46,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:30:46,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:30:46,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:46,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash 166697220, now seen corresponding path program 1 times [2023-11-12 02:30:46,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:46,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133501366] [2023-11-12 02:30:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:46,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:46,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:46,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021255904] [2023-11-12 02:30:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:46,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:46,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:46,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:46,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:30:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:47,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-12 02:30:47,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 498 proven. 180 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-11-12 02:30:50,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:30:51,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133501366] [2023-11-12 02:30:51,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021255904] [2023-11-12 02:30:51,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021255904] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:51,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:30:51,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 28 [2023-11-12 02:30:51,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779630795] [2023-11-12 02:30:51,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:51,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:51,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:30:51,515 INFO L87 Difference]: Start difference. First operand 65 states and 95 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:30:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:51,863 INFO L93 Difference]: Finished difference Result 149 states and 215 transitions. [2023-11-12 02:30:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:30:51,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 141 [2023-11-12 02:30:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:51,867 INFO L225 Difference]: With dead ends: 149 [2023-11-12 02:30:51,868 INFO L226 Difference]: Without dead ends: 87 [2023-11-12 02:30:51,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:30:51,871 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 101 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:51,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 272 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:30:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-12 02:30:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2023-11-12 02:30:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 30 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:30:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 121 transitions. [2023-11-12 02:30:51,903 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 121 transitions. Word has length 141 [2023-11-12 02:30:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:51,904 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 121 transitions. [2023-11-12 02:30:51,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:30:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 121 transitions. [2023-11-12 02:30:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-12 02:30:51,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:51,909 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:51,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:52,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash -210384266, now seen corresponding path program 1 times [2023-11-12 02:30:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612741272] [2023-11-12 02:30:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:52,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:52,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779625781] [2023-11-12 02:30:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:52,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:52,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:52,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_696958e6-aa25-44b3-b11f-6adf9de4461f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:30:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:52,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-12 02:30:52,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 623 proven. 135 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-12 02:31:24,713 INFO L327 TraceCheckSpWp]: Computing backward predicates...