./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/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_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/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_d569d405-66ba-4669-85ae-7da3c0ede176/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 2197c4d14fd5af1bc627adef461bd5f05d36e421274b7d409fe23e38f5f15829 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:33:34,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:33:34,380 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:33:34,385 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:33:34,386 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:33:34,410 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:33:34,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:33:34,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:33:34,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:33:34,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:33:34,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:33:34,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:33:34,418 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:33:34,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:33:34,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:33:34,424 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:33:34,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:33:34,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:33:34,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:33:34,426 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:33:34,426 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:33:34,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:33:34,428 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:33:34,428 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:33:34,428 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:33:34,429 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:33:34,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:33:34,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:33:34,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:34,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:33:34,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:33:34,433 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:33:34,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:33:34,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:33:34,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:33:34,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:33:34,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:33:34,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:33:34,435 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:33:34,435 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_d569d405-66ba-4669-85ae-7da3c0ede176/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2197c4d14fd5af1bc627adef461bd5f05d36e421274b7d409fe23e38f5f15829 [2023-11-12 02:33:34,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:33:34,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:33:34,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:33:34,791 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:33:34,792 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:33:34,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i [2023-11-12 02:33:37,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:33:38,279 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:33:38,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i [2023-11-12 02:33:38,297 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/data/efccacca4/55c32919cd954337a87c0d5c4afc014f/FLAGc43ed7420 [2023-11-12 02:33:38,312 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/data/efccacca4/55c32919cd954337a87c0d5c4afc014f [2023-11-12 02:33:38,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:33:38,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:33:38,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:38,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:33:38,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:33:38,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:38" (1/1) ... [2023-11-12 02:33:38,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fca19d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:38, skipping insertion in model container [2023-11-12 02:33:38,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:38" (1/1) ... [2023-11-12 02:33:38,400 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:33:38,606 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_d569d405-66ba-4669-85ae-7da3c0ede176/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i[915,928] [2023-11-12 02:33:38,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:38,945 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:33:38,958 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_d569d405-66ba-4669-85ae-7da3c0ede176/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i[915,928] [2023-11-12 02:33:39,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:39,195 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:33:39,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39 WrapperNode [2023-11-12 02:33:39,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:39,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:39,197 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:33:39,197 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:33:39,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,419 INFO L138 Inliner]: procedures = 26, calls = 91, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 803 [2023-11-12 02:33:39,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:39,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:33:39,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:33:39,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:33:39,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,477 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,545 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:33:39,618 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:33:39,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:33:39,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:33:39,619 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (1/1) ... [2023-11-12 02:33:39,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:39,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:39,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:33:39,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:33:39,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:33:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:33:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:33:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:33:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:33:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:39,921 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:39,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:41,319 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:41,330 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:41,330 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:33:41,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:41 BoogieIcfgContainer [2023-11-12 02:33:41,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:41,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:41,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:41,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:41,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:33:38" (1/3) ... [2023-11-12 02:33:41,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3754b06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:41, skipping insertion in model container [2023-11-12 02:33:41,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:39" (2/3) ... [2023-11-12 02:33:41,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3754b06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:41, skipping insertion in model container [2023-11-12 02:33:41,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:41" (3/3) ... [2023-11-12 02:33:41,342 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-8.i [2023-11-12 02:33:41,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:41,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:33:41,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:41,429 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;@8431798, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:41,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:33:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 315 states, 234 states have (on average 1.5512820512820513) internal successors, (363), 235 states have internal predecessors, (363), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-12 02:33:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2023-11-12 02:33:41,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:41,506 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:41,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:41,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash 867074527, now seen corresponding path program 1 times [2023-11-12 02:33:41,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762119500] [2023-11-12 02:33:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:41,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:42,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762119500] [2023-11-12 02:33:42,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:33:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892181974] [2023-11-12 02:33:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:42,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:42,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:42,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:33:42,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2023-11-12 02:33:42,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:42,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892181974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:42,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:42,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:42,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092069151] [2023-11-12 02:33:42,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:33:42,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:33:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:42,809 INFO L87 Difference]: Start difference. First operand has 315 states, 234 states have (on average 1.5512820512820513) internal successors, (363), 235 states have internal predecessors, (363), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 2 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-12 02:33:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:42,883 INFO L93 Difference]: Finished difference Result 623 states and 1110 transitions. [2023-11-12 02:33:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:33:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) Word has length 555 [2023-11-12 02:33:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:42,900 INFO L225 Difference]: With dead ends: 623 [2023-11-12 02:33:42,904 INFO L226 Difference]: Without dead ends: 311 [2023-11-12 02:33:42,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 554 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 02:33:42,923 INFO L413 NwaCegarLoop]: 509 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, 509 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 02:33:42,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-12 02:33:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2023-11-12 02:33:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 231 states have (on average 1.5281385281385282) internal successors, (353), 231 states have internal predecessors, (353), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-12 02:33:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 509 transitions. [2023-11-12 02:33:43,048 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 509 transitions. Word has length 555 [2023-11-12 02:33:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:43,050 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 509 transitions. [2023-11-12 02:33:43,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.0) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-12 02:33:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 509 transitions. [2023-11-12 02:33:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2023-11-12 02:33:43,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:43,072 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:43,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:33:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:43,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:43,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash -802071965, now seen corresponding path program 1 times [2023-11-12 02:33:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:43,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059834290] [2023-11-12 02:33:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:43,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:43,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:43,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232240099] [2023-11-12 02:33:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:43,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:43,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:43,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:44,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:33:44,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:45,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:45,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:45,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059834290] [2023-11-12 02:33:45,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:45,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232240099] [2023-11-12 02:33:45,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232240099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:45,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:45,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:33:45,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672219721] [2023-11-12 02:33:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:33:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:33:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:45,134 INFO L87 Difference]: Start difference. First operand 311 states and 509 transitions. Second operand has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 8 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:46,321 INFO L93 Difference]: Finished difference Result 1359 states and 2234 transitions. [2023-11-12 02:33:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:33:46,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 8 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 555 [2023-11-12 02:33:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:46,334 INFO L225 Difference]: With dead ends: 1359 [2023-11-12 02:33:46,335 INFO L226 Difference]: Without dead ends: 1051 [2023-11-12 02:33:46,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:33:46,339 INFO L413 NwaCegarLoop]: 945 mSDtfsCounter, 2050 mSDsluCounter, 3645 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2050 SdHoareTripleChecker+Valid, 4590 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:46,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2050 Valid, 4590 Invalid, 573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:33:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2023-11-12 02:33:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 639. [2023-11-12 02:33:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 480 states have (on average 1.5375) internal successors, (738), 480 states have internal predecessors, (738), 156 states have call successors, (156), 2 states have call predecessors, (156), 2 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-12 02:33:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1050 transitions. [2023-11-12 02:33:46,494 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1050 transitions. Word has length 555 [2023-11-12 02:33:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:46,497 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 1050 transitions. [2023-11-12 02:33:46,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 8 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1050 transitions. [2023-11-12 02:33:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2023-11-12 02:33:46,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:46,512 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:46,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:46,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:46,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:46,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1137090081, now seen corresponding path program 1 times [2023-11-12 02:33:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270274415] [2023-11-12 02:33:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:46,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894658943] [2023-11-12 02:33:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:46,854 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:46,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:47,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:33:47,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:47,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:47,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270274415] [2023-11-12 02:33:47,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894658943] [2023-11-12 02:33:47,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894658943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:47,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:47,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:47,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293015536] [2023-11-12 02:33:47,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:47,464 INFO L87 Difference]: Start difference. First operand 639 states and 1050 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:47,575 INFO L93 Difference]: Finished difference Result 1693 states and 2772 transitions. [2023-11-12 02:33:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 555 [2023-11-12 02:33:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:47,586 INFO L225 Difference]: With dead ends: 1693 [2023-11-12 02:33:47,586 INFO L226 Difference]: Without dead ends: 1057 [2023-11-12 02:33:47,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:47,590 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 311 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:47,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1072 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:33:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2023-11-12 02:33:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1053. [2023-11-12 02:33:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 836 states have (on average 1.5478468899521531) internal successors, (1294), 838 states have internal predecessors, (1294), 212 states have call successors, (212), 4 states have call predecessors, (212), 4 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-12 02:33:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1718 transitions. [2023-11-12 02:33:47,747 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1718 transitions. Word has length 555 [2023-11-12 02:33:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:47,753 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1718 transitions. [2023-11-12 02:33:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1718 transitions. [2023-11-12 02:33:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2023-11-12 02:33:47,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:47,770 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:47,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:47,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:47,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:47,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash -742040865, now seen corresponding path program 1 times [2023-11-12 02:33:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:47,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027954032] [2023-11-12 02:33:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:48,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:48,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165192783] [2023-11-12 02:33:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:48,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:48,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:48,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:48,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:33:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:48,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:33:48,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:48,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:48,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:48,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027954032] [2023-11-12 02:33:48,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:48,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165192783] [2023-11-12 02:33:48,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165192783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:48,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:48,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506108097] [2023-11-12 02:33:48,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:48,708 INFO L87 Difference]: Start difference. First operand 1053 states and 1718 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:48,861 INFO L93 Difference]: Finished difference Result 2899 states and 4722 transitions. [2023-11-12 02:33:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 555 [2023-11-12 02:33:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:48,877 INFO L225 Difference]: With dead ends: 2899 [2023-11-12 02:33:48,877 INFO L226 Difference]: Without dead ends: 1849 [2023-11-12 02:33:48,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:48,882 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 307 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:48,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1063 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:33:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-12 02:33:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1843. [2023-11-12 02:33:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1518 states have (on average 1.552042160737813) internal successors, (2356), 1524 states have internal predecessors, (2356), 316 states have call successors, (316), 8 states have call predecessors, (316), 8 states have return successors, (316), 310 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-12 02:33:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2988 transitions. [2023-11-12 02:33:49,066 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2988 transitions. Word has length 555 [2023-11-12 02:33:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:49,067 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2988 transitions. [2023-11-12 02:33:49,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2988 transitions. [2023-11-12 02:33:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2023-11-12 02:33:49,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:49,085 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:49,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:49,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:49,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1521813915, now seen corresponding path program 1 times [2023-11-12 02:33:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:49,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960719281] [2023-11-12 02:33:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:49,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:49,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:49,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852421872] [2023-11-12 02:33:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:49,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:49,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:33:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:49,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:33:49,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:52,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:52,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:52,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960719281] [2023-11-12 02:33:52,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852421872] [2023-11-12 02:33:52,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852421872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:52,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:52,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044566365] [2023-11-12 02:33:52,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:52,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:52,578 INFO L87 Difference]: Start difference. First operand 1843 states and 2988 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:53,145 INFO L93 Difference]: Finished difference Result 4953 states and 8056 transitions. [2023-11-12 02:33:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:33:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 555 [2023-11-12 02:33:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:53,169 INFO L225 Difference]: With dead ends: 4953 [2023-11-12 02:33:53,169 INFO L226 Difference]: Without dead ends: 3113 [2023-11-12 02:33:53,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:53,177 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 372 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:53,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1476 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:33:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2023-11-12 02:33:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 1991. [2023-11-12 02:33:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1587 states have (on average 1.5374921235034658) internal successors, (2440), 1593 states have internal predecessors, (2440), 394 states have call successors, (394), 9 states have call predecessors, (394), 9 states have return successors, (394), 388 states have call predecessors, (394), 394 states have call successors, (394) [2023-11-12 02:33:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3228 transitions. [2023-11-12 02:33:53,442 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3228 transitions. Word has length 555 [2023-11-12 02:33:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:53,444 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3228 transitions. [2023-11-12 02:33:53,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3228 transitions. [2023-11-12 02:33:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:33:53,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:53,452 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:53,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:53,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:53,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:53,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash 555639035, now seen corresponding path program 1 times [2023-11-12 02:33:53,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:53,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436728052] [2023-11-12 02:33:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:53,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962339109] [2023-11-12 02:33:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:53,801 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:53,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:33:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:54,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:54,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5621 proven. 147 refuted. 0 times theorem prover too weak. 6244 trivial. 0 not checked. [2023-11-12 02:33:54,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 84 proven. 147 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-12 02:33:55,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436728052] [2023-11-12 02:33:55,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962339109] [2023-11-12 02:33:55,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962339109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:55,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:55,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:33:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133226997] [2023-11-12 02:33:55,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:55,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:33:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:33:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:33:55,347 INFO L87 Difference]: Start difference. First operand 1991 states and 3228 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-12 02:33:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:55,959 INFO L93 Difference]: Finished difference Result 3047 states and 4936 transitions. [2023-11-12 02:33:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:33:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) Word has length 556 [2023-11-12 02:33:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:55,970 INFO L225 Difference]: With dead ends: 3047 [2023-11-12 02:33:55,970 INFO L226 Difference]: Without dead ends: 1207 [2023-11-12 02:33:55,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1104 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:33:55,976 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 619 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:55,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1091 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:33:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2023-11-12 02:33:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197. [2023-11-12 02:33:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 902 states have (on average 1.5066518847006651) internal successors, (1359), 904 states have internal predecessors, (1359), 286 states have call successors, (286), 8 states have call predecessors, (286), 8 states have return successors, (286), 284 states have call predecessors, (286), 286 states have call successors, (286) [2023-11-12 02:33:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1931 transitions. [2023-11-12 02:33:56,133 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1931 transitions. Word has length 556 [2023-11-12 02:33:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:56,135 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1931 transitions. [2023-11-12 02:33:56,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-12 02:33:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1931 transitions. [2023-11-12 02:33:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:33:56,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:56,142 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:56,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:56,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:56,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash -92088255, now seen corresponding path program 1 times [2023-11-12 02:33:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:56,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864309949] [2023-11-12 02:33:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:56,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:56,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969313206] [2023-11-12 02:33:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:56,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:56,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:33:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:57,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:33:57,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:57,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:57,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864309949] [2023-11-12 02:33:57,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969313206] [2023-11-12 02:33:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969313206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:57,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:57,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:57,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993455696] [2023-11-12 02:33:57,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:57,062 INFO L87 Difference]: Start difference. First operand 1197 states and 1931 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:57,268 INFO L93 Difference]: Finished difference Result 2255 states and 3628 transitions. [2023-11-12 02:33:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 556 [2023-11-12 02:33:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:57,278 INFO L225 Difference]: With dead ends: 2255 [2023-11-12 02:33:57,279 INFO L226 Difference]: Without dead ends: 1213 [2023-11-12 02:33:57,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:57,282 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 301 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:57,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 981 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:33:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-11-12 02:33:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 857. [2023-11-12 02:33:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 613 states have (on average 1.464926590538336) internal successors, (898), 613 states have internal predecessors, (898), 234 states have call successors, (234), 9 states have call predecessors, (234), 9 states have return successors, (234), 234 states have call predecessors, (234), 234 states have call successors, (234) [2023-11-12 02:33:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1366 transitions. [2023-11-12 02:33:57,393 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1366 transitions. Word has length 556 [2023-11-12 02:33:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:57,395 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1366 transitions. [2023-11-12 02:33:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1366 transitions. [2023-11-12 02:33:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:33:57,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:57,401 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:57,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:33:57,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:57,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1698216501, now seen corresponding path program 1 times [2023-11-12 02:33:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935070186] [2023-11-12 02:33:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:57,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:57,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616442900] [2023-11-12 02:33:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:57,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:57,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:57,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:57,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:33:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:58,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:33:58,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:58,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:58,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935070186] [2023-11-12 02:33:58,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616442900] [2023-11-12 02:33:58,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616442900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:58,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851460923] [2023-11-12 02:33:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:58,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:58,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:58,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:58,353 INFO L87 Difference]: Start difference. First operand 857 states and 1366 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:58,529 INFO L93 Difference]: Finished difference Result 2019 states and 3203 transitions. [2023-11-12 02:33:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 556 [2023-11-12 02:33:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:58,542 INFO L225 Difference]: With dead ends: 2019 [2023-11-12 02:33:58,542 INFO L226 Difference]: Without dead ends: 1321 [2023-11-12 02:33:58,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:58,546 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 293 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:58,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 983 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2023-11-12 02:33:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1287. [2023-11-12 02:33:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 976 states have (on average 1.4764344262295082) internal successors, (1441), 978 states have internal predecessors, (1441), 294 states have call successors, (294), 16 states have call predecessors, (294), 16 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-12 02:33:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2029 transitions. [2023-11-12 02:33:58,733 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2029 transitions. Word has length 556 [2023-11-12 02:33:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:58,734 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 2029 transitions. [2023-11-12 02:33:58,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:33:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2029 transitions. [2023-11-12 02:33:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:33:58,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:58,742 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:58,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:58,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:58,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 332167229, now seen corresponding path program 1 times [2023-11-12 02:33:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079267014] [2023-11-12 02:33:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:59,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304919340] [2023-11-12 02:33:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:59,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:59,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:33:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:59,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:33:59,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:33:59,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:59,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:59,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079267014] [2023-11-12 02:33:59,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:59,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304919340] [2023-11-12 02:33:59,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304919340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:59,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:59,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:33:59,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730305509] [2023-11-12 02:33:59,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:59,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:59,727 INFO L87 Difference]: Start difference. First operand 1287 states and 2029 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:34:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:00,443 INFO L93 Difference]: Finished difference Result 4817 states and 7652 transitions. [2023-11-12 02:34:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:34:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 556 [2023-11-12 02:34:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:00,471 INFO L225 Difference]: With dead ends: 4817 [2023-11-12 02:34:00,472 INFO L226 Difference]: Without dead ends: 3692 [2023-11-12 02:34:00,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:34:00,476 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 1172 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:00,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 1770 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:34:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2023-11-12 02:34:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 1602. [2023-11-12 02:34:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1291 states have (on average 1.482571649883811) internal successors, (1914), 1293 states have internal predecessors, (1914), 294 states have call successors, (294), 16 states have call predecessors, (294), 16 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-12 02:34:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2502 transitions. [2023-11-12 02:34:00,676 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2502 transitions. Word has length 556 [2023-11-12 02:34:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:00,677 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2502 transitions. [2023-11-12 02:34:00,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:34:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2502 transitions. [2023-11-12 02:34:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:34:00,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:00,685 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:00,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:00,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:00,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:00,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 494187967, now seen corresponding path program 1 times [2023-11-12 02:34:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:00,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445585868] [2023-11-12 02:34:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:00,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471736800] [2023-11-12 02:34:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:00,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:00,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:00,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:00,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:34:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:01,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:01,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5531 proven. 150 refuted. 0 times theorem prover too weak. 6331 trivial. 0 not checked. [2023-11-12 02:34:02,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 81 proven. 150 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-12 02:34:02,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445585868] [2023-11-12 02:34:02,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471736800] [2023-11-12 02:34:02,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471736800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:02,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:02,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:34:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515390052] [2023-11-12 02:34:02,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:34:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:34:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:34:02,604 INFO L87 Difference]: Start difference. First operand 1602 states and 2502 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-12 02:34:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:03,211 INFO L93 Difference]: Finished difference Result 2958 states and 4614 transitions. [2023-11-12 02:34:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:34:03,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) Word has length 556 [2023-11-12 02:34:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:03,223 INFO L225 Difference]: With dead ends: 2958 [2023-11-12 02:34:03,224 INFO L226 Difference]: Without dead ends: 1482 [2023-11-12 02:34:03,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1104 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:34:03,228 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 603 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:03,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 1073 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:34:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2023-11-12 02:34:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1456. [2023-11-12 02:34:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1140 states have (on average 1.4763157894736842) internal successors, (1683), 1142 states have internal predecessors, (1683), 294 states have call successors, (294), 21 states have call predecessors, (294), 21 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-12 02:34:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2271 transitions. [2023-11-12 02:34:03,381 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2271 transitions. Word has length 556 [2023-11-12 02:34:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:03,382 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2271 transitions. [2023-11-12 02:34:03,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-12 02:34:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2271 transitions. [2023-11-12 02:34:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:34:03,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:03,389 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:03,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:03,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:34:03,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:03,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:03,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1839902717, now seen corresponding path program 1 times [2023-11-12 02:34:03,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:03,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978899096] [2023-11-12 02:34:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:03,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:03,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886242534] [2023-11-12 02:34:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:03,714 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:03,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:34:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:04,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:34:04,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6011 proven. 102 refuted. 0 times theorem prover too weak. 5899 trivial. 0 not checked. [2023-11-12 02:34:05,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 129 proven. 102 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-12 02:34:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978899096] [2023-11-12 02:34:07,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886242534] [2023-11-12 02:34:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886242534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:07,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:07,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2023-11-12 02:34:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050162120] [2023-11-12 02:34:07,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:34:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:34:07,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:34:07,078 INFO L87 Difference]: Start difference. First operand 1456 states and 2271 transitions. Second operand has 25 states, 24 states have (on average 13.083333333333334) internal successors, (314), 25 states have internal predecessors, (314), 5 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 5 states have call successors, (156) [2023-11-12 02:34:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:13,529 INFO L93 Difference]: Finished difference Result 10756 states and 17019 transitions. [2023-11-12 02:34:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-12 02:34:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 13.083333333333334) internal successors, (314), 25 states have internal predecessors, (314), 5 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 5 states have call successors, (156) Word has length 556 [2023-11-12 02:34:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:13,590 INFO L225 Difference]: With dead ends: 10756 [2023-11-12 02:34:13,591 INFO L226 Difference]: Without dead ends: 9470 [2023-11-12 02:34:13,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1164 GetRequests, 1095 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=928, Invalid=4042, Unknown=0, NotChecked=0, Total=4970 [2023-11-12 02:34:13,599 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 8057 mSDsluCounter, 6746 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 2264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8134 SdHoareTripleChecker+Valid, 7411 SdHoareTripleChecker+Invalid, 5357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2264 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:13,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8134 Valid, 7411 Invalid, 5357 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2264 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-12 02:34:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9470 states. [2023-11-12 02:34:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9470 to 3922. [2023-11-12 02:34:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3221 states have (on average 1.494566904687985) internal successors, (4814), 3229 states have internal predecessors, (4814), 644 states have call successors, (644), 56 states have call predecessors, (644), 56 states have return successors, (644), 636 states have call predecessors, (644), 644 states have call successors, (644) [2023-11-12 02:34:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 6102 transitions. [2023-11-12 02:34:14,237 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 6102 transitions. Word has length 556 [2023-11-12 02:34:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:14,239 INFO L495 AbstractCegarLoop]: Abstraction has 3922 states and 6102 transitions. [2023-11-12 02:34:14,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 13.083333333333334) internal successors, (314), 25 states have internal predecessors, (314), 5 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 5 states have call successors, (156) [2023-11-12 02:34:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 6102 transitions. [2023-11-12 02:34:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:34:14,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:14,251 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:14,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:14,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:14,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:14,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1692954629, now seen corresponding path program 1 times [2023-11-12 02:34:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:14,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188159808] [2023-11-12 02:34:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:14,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:14,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586495120] [2023-11-12 02:34:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:14,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:14,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:14,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:14,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:34:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:15,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:34:15,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:34:15,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:15,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:15,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188159808] [2023-11-12 02:34:15,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:15,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586495120] [2023-11-12 02:34:15,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586495120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399384427] [2023-11-12 02:34:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:15,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:15,320 INFO L87 Difference]: Start difference. First operand 3922 states and 6102 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:34:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:15,711 INFO L93 Difference]: Finished difference Result 9088 states and 14186 transitions. [2023-11-12 02:34:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:34:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 556 [2023-11-12 02:34:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:15,730 INFO L225 Difference]: With dead ends: 9088 [2023-11-12 02:34:15,731 INFO L226 Difference]: Without dead ends: 5340 [2023-11-12 02:34:15,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:15,742 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 154 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:15,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1003 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:34:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2023-11-12 02:34:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5326. [2023-11-12 02:34:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5326 states, 4457 states have (on average 1.4996634507516267) internal successors, (6684), 4477 states have internal predecessors, (6684), 800 states have call successors, (800), 68 states have call predecessors, (800), 68 states have return successors, (800), 780 states have call predecessors, (800), 800 states have call successors, (800) [2023-11-12 02:34:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5326 states to 5326 states and 8284 transitions. [2023-11-12 02:34:16,300 INFO L78 Accepts]: Start accepts. Automaton has 5326 states and 8284 transitions. Word has length 556 [2023-11-12 02:34:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:16,301 INFO L495 AbstractCegarLoop]: Abstraction has 5326 states and 8284 transitions. [2023-11-12 02:34:16,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:34:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5326 states and 8284 transitions. [2023-11-12 02:34:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:34:16,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:16,314 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:16,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:16,524 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:16,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash 810543419, now seen corresponding path program 1 times [2023-11-12 02:34:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:16,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452033323] [2023-11-12 02:34:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:16,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:16,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586963714] [2023-11-12 02:34:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:16,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:16,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:16,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:16,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:34:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:17,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:34:17,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-12 02:34:17,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:17,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452033323] [2023-11-12 02:34:17,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586963714] [2023-11-12 02:34:17,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586963714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:17,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:17,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:17,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113429709] [2023-11-12 02:34:17,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:34:17,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:34:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:34:17,811 INFO L87 Difference]: Start difference. First operand 5326 states and 8284 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:34:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:18,732 INFO L93 Difference]: Finished difference Result 15630 states and 24330 transitions. [2023-11-12 02:34:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:34:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 556 [2023-11-12 02:34:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:18,761 INFO L225 Difference]: With dead ends: 15630 [2023-11-12 02:34:18,761 INFO L226 Difference]: Without dead ends: 10478 [2023-11-12 02:34:18,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:34:18,773 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 274 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:18,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1297 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:34:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10478 states. [2023-11-12 02:34:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10478 to 10476. [2023-11-12 02:34:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10476 states, 8823 states have (on average 1.501756772072991) internal successors, (13250), 8863 states have internal predecessors, (13250), 1522 states have call successors, (1522), 130 states have call predecessors, (1522), 130 states have return successors, (1522), 1482 states have call predecessors, (1522), 1522 states have call successors, (1522) [2023-11-12 02:34:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10476 states to 10476 states and 16294 transitions. [2023-11-12 02:34:19,857 INFO L78 Accepts]: Start accepts. Automaton has 10476 states and 16294 transitions. Word has length 556 [2023-11-12 02:34:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:19,858 INFO L495 AbstractCegarLoop]: Abstraction has 10476 states and 16294 transitions. [2023-11-12 02:34:19,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-12 02:34:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10476 states and 16294 transitions. [2023-11-12 02:34:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-11-12 02:34:19,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:19,878 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:19,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:34:20,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:20,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1095859847, now seen corresponding path program 1 times [2023-11-12 02:34:20,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674509742] [2023-11-12 02:34:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:20,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035272208] [2023-11-12 02:34:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:20,173 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:20,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d569d405-66ba-4669-85ae-7da3c0ede176/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:34:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:20,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:34:20,839 INFO L285 TraceCheckSpWp]: Computing forward predicates...