./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 23501b270359c8bb66bf017123a6b997c736c6bad56bfcdab3d899e8f1555d26 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:52:28,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:52:28,137 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:52:28,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:52:28,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:52:28,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:52:28,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:52:28,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:52:28,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:52:28,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:52:28,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:52:28,186 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:52:28,186 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:52:28,188 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:52:28,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:52:28,189 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:52:28,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:52:28,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:52:28,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:52:28,191 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:52:28,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:52:28,192 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:52:28,193 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:52:28,193 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:52:28,194 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:52:28,195 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:52:28,195 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:52:28,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:52:28,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:28,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:52:28,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:52:28,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:52:28,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:52:28,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:52:28,199 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:52:28,199 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:52:28,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:52:28,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:52:28,200 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:52:28,200 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_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23501b270359c8bb66bf017123a6b997c736c6bad56bfcdab3d899e8f1555d26 [2023-11-06 22:52:28,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:52:28,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:52:28,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:52:28,585 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:52:28,585 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:52:28,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i [2023-11-06 22:52:31,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:52:32,347 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:52:32,348 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i [2023-11-06 22:52:32,367 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/data/121cec2d0/848cb39f407c4c91bd35456e7d55766a/FLAG893240f55 [2023-11-06 22:52:32,396 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/data/121cec2d0/848cb39f407c4c91bd35456e7d55766a [2023-11-06 22:52:32,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:52:32,400 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:52:32,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:32,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:52:32,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:52:32,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60521661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32, skipping insertion in model container [2023-11-06 22:52:32,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:52:32,696 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_09a45ac8-1d80-4fcb-94a1-585952315ea0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i[916,929] [2023-11-06 22:52:33,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:33,083 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:52:33,097 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_09a45ac8-1d80-4fcb-94a1-585952315ea0/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i[916,929] [2023-11-06 22:52:33,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:33,323 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:52:33,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33 WrapperNode [2023-11-06 22:52:33,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:33,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:33,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:52:33,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:52:33,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,654 INFO L138 Inliner]: procedures = 26, calls = 82, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 779 [2023-11-06 22:52:33,655 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:33,656 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:52:33,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:52:33,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:52:33,683 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,938 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:52:33,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:52:33,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:52:33,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:52:33,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2023-11-06 22:52:33,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:34,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:52:34,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:52:34,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:52:34,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:52:34,061 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:52:34,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:52:34,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:52:34,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:52:34,221 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:52:34,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:52:35,878 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:52:35,900 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:52:35,900 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:52:35,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:35 BoogieIcfgContainer [2023-11-06 22:52:35,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:52:35,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:52:35,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:52:35,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:52:35,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:32" (1/3) ... [2023-11-06 22:52:35,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175c7598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:35, skipping insertion in model container [2023-11-06 22:52:35,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (2/3) ... [2023-11-06 22:52:35,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175c7598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:35, skipping insertion in model container [2023-11-06 22:52:35,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:35" (3/3) ... [2023-11-06 22:52:35,924 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-11.i [2023-11-06 22:52:35,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:52:35,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:52:36,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:52:36,069 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=LoopsAndPotentialCycles, 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;@10b1f89c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:52:36,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:52:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 227 states have (on average 1.5859030837004404) internal successors, (360), 228 states have internal predecessors, (360), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 22:52:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-06 22:52:36,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:36,115 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:36,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:36,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1854657156, now seen corresponding path program 1 times [2023-11-06 22:52:36,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:36,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87712742] [2023-11-06 22:52:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:36,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:36,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:36,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87712742] [2023-11-06 22:52:36,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:52:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347562578] [2023-11-06 22:52:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:36,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:36,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:36,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:52:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:37,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:52:37,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2023-11-06 22:52:37,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347562578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:37,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:52:37,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173157518] [2023-11-06 22:52:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:37,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:52:37,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:37,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:52:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:52:37,565 INFO L87 Difference]: Start difference. First operand has 299 states, 227 states have (on average 1.5859030837004404) internal successors, (360), 228 states have internal predecessors, (360), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:52:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:37,648 INFO L93 Difference]: Finished difference Result 591 states and 1059 transitions. [2023-11-06 22:52:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:52:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) Word has length 491 [2023-11-06 22:52:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:37,666 INFO L225 Difference]: With dead ends: 591 [2023-11-06 22:52:37,666 INFO L226 Difference]: Without dead ends: 295 [2023-11-06 22:52:37,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:52:37,678 INFO L413 NwaCegarLoop]: 490 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, 490 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 [2023-11-06 22:52:37,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-06 22:52:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-11-06 22:52:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 224 states have (on average 1.5714285714285714) internal successors, (352), 224 states have internal predecessors, (352), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 22:52:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 490 transitions. [2023-11-06 22:52:37,771 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 490 transitions. Word has length 491 [2023-11-06 22:52:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:37,772 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 490 transitions. [2023-11-06 22:52:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-06 22:52:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 490 transitions. [2023-11-06 22:52:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-06 22:52:37,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:37,790 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:37,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:38,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:52:38,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:38,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1018284854, now seen corresponding path program 1 times [2023-11-06 22:52:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:38,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034005114] [2023-11-06 22:52:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:38,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:38,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:38,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566137163] [2023-11-06 22:52:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:38,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:38,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:38,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:52:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:38,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:52:38,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:38,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:38,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034005114] [2023-11-06 22:52:38,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566137163] [2023-11-06 22:52:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566137163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:38,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:38,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169510937] [2023-11-06 22:52:38,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:38,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:38,873 INFO L87 Difference]: Start difference. First operand 295 states and 490 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:39,068 INFO L93 Difference]: Finished difference Result 705 states and 1177 transitions. [2023-11-06 22:52:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-06 22:52:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:39,078 INFO L225 Difference]: With dead ends: 705 [2023-11-06 22:52:39,079 INFO L226 Difference]: Without dead ends: 413 [2023-11-06 22:52:39,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:39,082 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 172 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:39,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1398 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-06 22:52:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 365. [2023-11-06 22:52:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 294 states have (on average 1.6326530612244898) internal successors, (480), 294 states have internal predecessors, (480), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 22:52:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 618 transitions. [2023-11-06 22:52:39,129 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 618 transitions. Word has length 491 [2023-11-06 22:52:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:39,133 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 618 transitions. [2023-11-06 22:52:39,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 618 transitions. [2023-11-06 22:52:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-06 22:52:39,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:39,140 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:39,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:39,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:39,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:39,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1111250319, now seen corresponding path program 1 times [2023-11-06 22:52:39,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:39,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632830973] [2023-11-06 22:52:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:39,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892186128] [2023-11-06 22:52:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:39,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:39,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:39,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:39,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:52:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:40,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:52:40,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:40,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:40,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632830973] [2023-11-06 22:52:40,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892186128] [2023-11-06 22:52:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892186128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:40,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:40,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670910735] [2023-11-06 22:52:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:40,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:40,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:40,169 INFO L87 Difference]: Start difference. First operand 365 states and 618 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:40,265 INFO L93 Difference]: Finished difference Result 1088 states and 1846 transitions. [2023-11-06 22:52:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-06 22:52:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:40,278 INFO L225 Difference]: With dead ends: 1088 [2023-11-06 22:52:40,279 INFO L226 Difference]: Without dead ends: 726 [2023-11-06 22:52:40,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:40,284 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 464 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:40,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 968 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-06 22:52:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 394. [2023-11-06 22:52:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 323 states have (on average 1.6377708978328174) internal successors, (529), 323 states have internal predecessors, (529), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 22:52:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 667 transitions. [2023-11-06 22:52:40,366 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 667 transitions. Word has length 492 [2023-11-06 22:52:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:40,372 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 667 transitions. [2023-11-06 22:52:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 667 transitions. [2023-11-06 22:52:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-06 22:52:40,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:40,383 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:40,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:52:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:40,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash 799792239, now seen corresponding path program 1 times [2023-11-06 22:52:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:40,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70593492] [2023-11-06 22:52:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:40,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:40,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234917164] [2023-11-06 22:52:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:40,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:40,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:40,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:52:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:41,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:52:41,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:41,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70593492] [2023-11-06 22:52:41,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:41,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234917164] [2023-11-06 22:52:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234917164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:41,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:41,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212433213] [2023-11-06 22:52:41,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:41,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:41,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:41,554 INFO L87 Difference]: Start difference. First operand 394 states and 667 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:41,699 INFO L93 Difference]: Finished difference Result 1159 states and 1963 transitions. [2023-11-06 22:52:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-06 22:52:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:41,708 INFO L225 Difference]: With dead ends: 1159 [2023-11-06 22:52:41,708 INFO L226 Difference]: Without dead ends: 768 [2023-11-06 22:52:41,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:41,711 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 431 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:41,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 940 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-11-06 22:52:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 766. [2023-11-06 22:52:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 625 states have (on average 1.616) internal successors, (1010), 625 states have internal predecessors, (1010), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 22:52:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1286 transitions. [2023-11-06 22:52:41,779 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1286 transitions. Word has length 492 [2023-11-06 22:52:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:41,781 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 1286 transitions. [2023-11-06 22:52:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1286 transitions. [2023-11-06 22:52:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-06 22:52:41,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:41,788 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:41,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:41,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:41,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:41,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1140789775, now seen corresponding path program 1 times [2023-11-06 22:52:41,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365103268] [2023-11-06 22:52:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:41,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:42,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160407689] [2023-11-06 22:52:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:42,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:42,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:42,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:42,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:52:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:42,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:52:42,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:42,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365103268] [2023-11-06 22:52:42,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160407689] [2023-11-06 22:52:42,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160407689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:42,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:42,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965573372] [2023-11-06 22:52:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:42,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:42,922 INFO L87 Difference]: Start difference. First operand 766 states and 1286 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:43,085 INFO L93 Difference]: Finished difference Result 1533 states and 2574 transitions. [2023-11-06 22:52:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-06 22:52:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:43,095 INFO L225 Difference]: With dead ends: 1533 [2023-11-06 22:52:43,095 INFO L226 Difference]: Without dead ends: 770 [2023-11-06 22:52:43,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:43,099 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 407 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:43,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1270 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-11-06 22:52:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 768. [2023-11-06 22:52:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 627 states have (on average 1.5980861244019138) internal successors, (1002), 627 states have internal predecessors, (1002), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 22:52:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1278 transitions. [2023-11-06 22:52:43,185 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1278 transitions. Word has length 492 [2023-11-06 22:52:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:43,190 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1278 transitions. [2023-11-06 22:52:43,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1278 transitions. [2023-11-06 22:52:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-06 22:52:43,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:43,197 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:43,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:52:43,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:43,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:43,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2107977169, now seen corresponding path program 1 times [2023-11-06 22:52:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:43,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174821385] [2023-11-06 22:52:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:43,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:43,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738702147] [2023-11-06 22:52:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:43,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:43,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:43,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:52:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:44,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:52:44,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:44,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:44,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174821385] [2023-11-06 22:52:44,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:44,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738702147] [2023-11-06 22:52:44,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738702147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:44,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048738483] [2023-11-06 22:52:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:44,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:44,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:44,322 INFO L87 Difference]: Start difference. First operand 768 states and 1278 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:44,528 INFO L93 Difference]: Finished difference Result 2294 states and 3820 transitions. [2023-11-06 22:52:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 493 [2023-11-06 22:52:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:44,544 INFO L225 Difference]: With dead ends: 2294 [2023-11-06 22:52:44,545 INFO L226 Difference]: Without dead ends: 1529 [2023-11-06 22:52:44,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:44,550 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 417 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:44,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1160 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:52:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2023-11-06 22:52:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1076. [2023-11-06 22:52:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 935 states have (on average 1.629946524064171) internal successors, (1524), 935 states have internal predecessors, (1524), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 22:52:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1800 transitions. [2023-11-06 22:52:44,720 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1800 transitions. Word has length 493 [2023-11-06 22:52:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:44,721 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1800 transitions. [2023-11-06 22:52:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1800 transitions. [2023-11-06 22:52:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-06 22:52:44,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:44,729 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:44,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:44,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:44,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:44,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:44,940 INFO L85 PathProgramCache]: Analyzing trace with hash -56993171, now seen corresponding path program 1 times [2023-11-06 22:52:44,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:44,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875133727] [2023-11-06 22:52:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:45,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:45,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067667178] [2023-11-06 22:52:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:45,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:45,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:52:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:45,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:52:45,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:45,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:45,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:45,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875133727] [2023-11-06 22:52:45,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:45,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067667178] [2023-11-06 22:52:45,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067667178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:45,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:45,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:52:45,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395624194] [2023-11-06 22:52:45,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:45,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:52:45,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:52:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:45,778 INFO L87 Difference]: Start difference. First operand 1076 states and 1800 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:46,909 INFO L93 Difference]: Finished difference Result 3134 states and 5254 transitions. [2023-11-06 22:52:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:52:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 493 [2023-11-06 22:52:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:46,926 INFO L225 Difference]: With dead ends: 3134 [2023-11-06 22:52:46,926 INFO L226 Difference]: Without dead ends: 2061 [2023-11-06 22:52:46,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:46,931 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 690 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:46,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 2476 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:52:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2023-11-06 22:52:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1158. [2023-11-06 22:52:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1017 states have (on average 1.6302851524090463) internal successors, (1658), 1017 states have internal predecessors, (1658), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 22:52:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1934 transitions. [2023-11-06 22:52:47,088 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1934 transitions. Word has length 493 [2023-11-06 22:52:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,089 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1934 transitions. [2023-11-06 22:52:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1934 transitions. [2023-11-06 22:52:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-06 22:52:47,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,097 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:47,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:52:47,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:47,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:47,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -16318421, now seen corresponding path program 1 times [2023-11-06 22:52:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899295784] [2023-11-06 22:52:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648446294] [2023-11-06 22:52:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:47,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:47,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:52:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:47,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:52:48,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 600 proven. 198 refuted. 0 times theorem prover too weak. 8586 trivial. 0 not checked. [2023-11-06 22:52:48,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6 proven. 198 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:52:49,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899295784] [2023-11-06 22:52:49,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648446294] [2023-11-06 22:52:49,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648446294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:49,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:52:49,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:52:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514313147] [2023-11-06 22:52:49,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:52:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:49,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:52:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:49,399 INFO L87 Difference]: Start difference. First operand 1158 states and 1934 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-06 22:52:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:50,075 INFO L93 Difference]: Finished difference Result 2103 states and 3489 transitions. [2023-11-06 22:52:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:52:50,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 493 [2023-11-06 22:52:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:50,085 INFO L225 Difference]: With dead ends: 2103 [2023-11-06 22:52:50,085 INFO L226 Difference]: Without dead ends: 948 [2023-11-06 22:52:50,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:50,091 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 527 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:50,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1046 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:52:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2023-11-06 22:52:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 874. [2023-11-06 22:52:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 731 states have (on average 1.5841313269493844) internal successors, (1158), 731 states have internal predecessors, (1158), 138 states have call successors, (138), 4 states have call predecessors, (138), 4 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 22:52:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1434 transitions. [2023-11-06 22:52:50,230 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1434 transitions. Word has length 493 [2023-11-06 22:52:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:50,231 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1434 transitions. [2023-11-06 22:52:50,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-06 22:52:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1434 transitions. [2023-11-06 22:52:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-06 22:52:50,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:50,238 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:50,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:50,448 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:50,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1234624771, now seen corresponding path program 1 times [2023-11-06 22:52:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:50,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379801951] [2023-11-06 22:52:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:50,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:50,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885048720] [2023-11-06 22:52:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:50,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:50,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:50,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:50,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:52:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:51,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:52:51,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4208 proven. 66 refuted. 0 times theorem prover too weak. 5110 trivial. 0 not checked. [2023-11-06 22:52:51,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 138 proven. 66 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:52:51,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:51,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379801951] [2023-11-06 22:52:51,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:51,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885048720] [2023-11-06 22:52:51,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885048720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:51,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:52:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:52:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518674067] [2023-11-06 22:52:51,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:52:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:52:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:51,959 INFO L87 Difference]: Start difference. First operand 874 states and 1434 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-06 22:52:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:52,649 INFO L93 Difference]: Finished difference Result 1759 states and 2875 transitions. [2023-11-06 22:52:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 494 [2023-11-06 22:52:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:52,659 INFO L225 Difference]: With dead ends: 1759 [2023-11-06 22:52:52,660 INFO L226 Difference]: Without dead ends: 888 [2023-11-06 22:52:52,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 980 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:52:52,665 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 357 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:52,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1068 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:52:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2023-11-06 22:52:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 880. [2023-11-06 22:52:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 735 states have (on average 1.5537414965986394) internal successors, (1142), 735 states have internal predecessors, (1142), 138 states have call successors, (138), 6 states have call predecessors, (138), 6 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 22:52:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1418 transitions. [2023-11-06 22:52:52,820 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1418 transitions. Word has length 494 [2023-11-06 22:52:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:52,822 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1418 transitions. [2023-11-06 22:52:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-06 22:52:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1418 transitions. [2023-11-06 22:52:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-06 22:52:52,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:52,831 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:52,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:53,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:53,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:53,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash 417026439, now seen corresponding path program 1 times [2023-11-06 22:52:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:53,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271788414] [2023-11-06 22:52:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:53,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6672791] [2023-11-06 22:52:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:53,147 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:53,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:52:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:53,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:52:53,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:53,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:53,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271788414] [2023-11-06 22:52:53,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6672791] [2023-11-06 22:52:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6672791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:53,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:53,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:53,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77989885] [2023-11-06 22:52:53,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:53,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:53,826 INFO L87 Difference]: Start difference. First operand 880 states and 1418 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:54,448 INFO L93 Difference]: Finished difference Result 2465 states and 3943 transitions. [2023-11-06 22:52:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 494 [2023-11-06 22:52:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:54,460 INFO L225 Difference]: With dead ends: 2465 [2023-11-06 22:52:54,460 INFO L226 Difference]: Without dead ends: 1539 [2023-11-06 22:52:54,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:54,463 INFO L413 NwaCegarLoop]: 924 mSDtfsCounter, 703 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:54,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1888 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:52:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2023-11-06 22:52:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1250. [2023-11-06 22:52:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1011 states have (on average 1.5291790306627102) internal successors, (1546), 1013 states have internal predecessors, (1546), 228 states have call successors, (228), 10 states have call predecessors, (228), 10 states have return successors, (228), 226 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-06 22:52:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 2002 transitions. [2023-11-06 22:52:54,624 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 2002 transitions. Word has length 494 [2023-11-06 22:52:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:54,625 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 2002 transitions. [2023-11-06 22:52:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 2002 transitions. [2023-11-06 22:52:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-06 22:52:54,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:54,631 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:54,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:54,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:52:54,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:54,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:54,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1094399687, now seen corresponding path program 1 times [2023-11-06 22:52:54,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:54,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967920660] [2023-11-06 22:52:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:54,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:54,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322867956] [2023-11-06 22:52:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:54,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:54,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:54,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:52:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:55,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:52:55,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4758 proven. 99 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2023-11-06 22:52:55,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 105 proven. 99 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:52:56,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967920660] [2023-11-06 22:52:56,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322867956] [2023-11-06 22:52:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322867956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:56,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:52:56,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:52:56,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839848975] [2023-11-06 22:52:56,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:56,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:52:56,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:56,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:52:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:56,387 INFO L87 Difference]: Start difference. First operand 1250 states and 2002 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-06 22:52:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:56,984 INFO L93 Difference]: Finished difference Result 2533 states and 4033 transitions. [2023-11-06 22:52:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 494 [2023-11-06 22:52:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:56,997 INFO L225 Difference]: With dead ends: 2533 [2023-11-06 22:52:56,997 INFO L226 Difference]: Without dead ends: 1286 [2023-11-06 22:52:57,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 980 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:52:57,001 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 333 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:57,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1057 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:52:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2023-11-06 22:52:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1266. [2023-11-06 22:52:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1023 states have (on average 1.5112414467253177) internal successors, (1546), 1025 states have internal predecessors, (1546), 228 states have call successors, (228), 14 states have call predecessors, (228), 14 states have return successors, (228), 226 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-06 22:52:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2002 transitions. [2023-11-06 22:52:57,188 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2002 transitions. Word has length 494 [2023-11-06 22:52:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:57,189 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 2002 transitions. [2023-11-06 22:52:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-06 22:52:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2002 transitions. [2023-11-06 22:52:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-06 22:52:57,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:57,196 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:57,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:57,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:57,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:57,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash -927922553, now seen corresponding path program 1 times [2023-11-06 22:52:57,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:57,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998003983] [2023-11-06 22:52:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:57,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360471673] [2023-11-06 22:52:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:57,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:57,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:52:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:58,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:52:58,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:52:58,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:58,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998003983] [2023-11-06 22:52:58,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360471673] [2023-11-06 22:52:58,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360471673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:58,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:58,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773806033] [2023-11-06 22:52:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:58,248 INFO L87 Difference]: Start difference. First operand 1266 states and 2002 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:58,815 INFO L93 Difference]: Finished difference Result 3366 states and 5313 transitions. [2023-11-06 22:52:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 494 [2023-11-06 22:52:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:58,831 INFO L225 Difference]: With dead ends: 3366 [2023-11-06 22:52:58,832 INFO L226 Difference]: Without dead ends: 2046 [2023-11-06 22:52:58,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:52:58,837 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 582 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:58,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1515 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:52:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2023-11-06 22:52:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1771. [2023-11-06 22:52:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1456 states have (on average 1.5192307692307692) internal successors, (2212), 1460 states have internal predecessors, (2212), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 292 states have call predecessors, (296), 296 states have call successors, (296) [2023-11-06 22:52:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2804 transitions. [2023-11-06 22:52:59,090 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2804 transitions. Word has length 494 [2023-11-06 22:52:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:59,092 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2804 transitions. [2023-11-06 22:52:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:52:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2804 transitions. [2023-11-06 22:52:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-06 22:52:59,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:59,102 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:59,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:59,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:59,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2055208693, now seen corresponding path program 1 times [2023-11-06 22:52:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:59,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828514810] [2023-11-06 22:52:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:59,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236630863] [2023-11-06 22:52:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:59,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:59,426 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:59,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:53:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:00,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:53:00,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 2780 proven. 168 refuted. 0 times theorem prover too weak. 6436 trivial. 0 not checked. [2023-11-06 22:53:00,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 36 proven. 168 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:53:01,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828514810] [2023-11-06 22:53:01,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236630863] [2023-11-06 22:53:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236630863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:01,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-06 22:53:01,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331146713] [2023-11-06 22:53:01,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:01,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:53:01,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:01,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:53:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:53:01,582 INFO L87 Difference]: Start difference. First operand 1771 states and 2804 transitions. Second operand has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 12 states have internal predecessors, (248), 4 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-06 22:53:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:05,151 INFO L93 Difference]: Finished difference Result 9358 states and 14627 transitions. [2023-11-06 22:53:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 22:53:05,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 12 states have internal predecessors, (248), 4 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) Word has length 494 [2023-11-06 22:53:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:05,202 INFO L225 Difference]: With dead ends: 9358 [2023-11-06 22:53:05,202 INFO L226 Difference]: Without dead ends: 7590 [2023-11-06 22:53:05,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:53:05,211 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 3585 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:05,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3599 Valid, 3873 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 1807 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:53:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7590 states. [2023-11-06 22:53:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7590 to 5526. [2023-11-06 22:53:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 4777 states have (on average 1.536110529621101) internal successors, (7338), 4793 states have internal predecessors, (7338), 676 states have call successors, (676), 72 states have call predecessors, (676), 72 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-06 22:53:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 8690 transitions. [2023-11-06 22:53:05,871 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 8690 transitions. Word has length 494 [2023-11-06 22:53:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:05,872 INFO L495 AbstractCegarLoop]: Abstraction has 5526 states and 8690 transitions. [2023-11-06 22:53:05,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 12 states have internal predecessors, (248), 4 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-06 22:53:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 8690 transitions. [2023-11-06 22:53:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-06 22:53:05,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:05,890 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:05,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:06,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:06,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:06,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:06,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2044361717, now seen corresponding path program 1 times [2023-11-06 22:53:06,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:06,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388169447] [2023-11-06 22:53:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:06,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:06,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142002641] [2023-11-06 22:53:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:06,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:06,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:06,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:06,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:53:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:06,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:53:06,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:09,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:09,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:09,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388169447] [2023-11-06 22:53:09,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142002641] [2023-11-06 22:53:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142002641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:53:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807185062] [2023-11-06 22:53:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:53:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:53:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:09,324 INFO L87 Difference]: Start difference. First operand 5526 states and 8690 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:10,282 INFO L93 Difference]: Finished difference Result 15264 states and 24168 transitions. [2023-11-06 22:53:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:53:10,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-06 22:53:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:10,342 INFO L225 Difference]: With dead ends: 15264 [2023-11-06 22:53:10,342 INFO L226 Difference]: Without dead ends: 9741 [2023-11-06 22:53:10,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:53:10,410 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 383 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:10,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 1804 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9741 states. [2023-11-06 22:53:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9741 to 9442. [2023-11-06 22:53:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 8617 states have (on average 1.5752582105141) internal successors, (13574), 8633 states have internal predecessors, (13574), 745 states have call successors, (745), 79 states have call predecessors, (745), 79 states have return successors, (745), 729 states have call predecessors, (745), 745 states have call successors, (745) [2023-11-06 22:53:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 15064 transitions. [2023-11-06 22:53:11,086 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 15064 transitions. Word has length 495 [2023-11-06 22:53:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:11,088 INFO L495 AbstractCegarLoop]: Abstraction has 9442 states and 15064 transitions. [2023-11-06 22:53:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 15064 transitions. [2023-11-06 22:53:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-06 22:53:11,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:11,102 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:11,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:11,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:53:11,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:11,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1273628151, now seen corresponding path program 1 times [2023-11-06 22:53:11,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:11,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929488839] [2023-11-06 22:53:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:11,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:11,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608662483] [2023-11-06 22:53:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:11,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:11,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:11,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:11,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:53:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:12,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:53:12,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:12,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929488839] [2023-11-06 22:53:12,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608662483] [2023-11-06 22:53:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608662483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:53:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776621707] [2023-11-06 22:53:12,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:12,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:12,323 INFO L87 Difference]: Start difference. First operand 9442 states and 15064 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:13,802 INFO L93 Difference]: Finished difference Result 35179 states and 55980 transitions. [2023-11-06 22:53:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:53:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-06 22:53:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:13,879 INFO L225 Difference]: With dead ends: 35179 [2023-11-06 22:53:13,879 INFO L226 Difference]: Without dead ends: 27198 [2023-11-06 22:53:13,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:13,899 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 937 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:13,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1745 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27198 states. [2023-11-06 22:53:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27198 to 17985. [2023-11-06 22:53:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17985 states, 16739 states have (on average 1.5825915526614494) internal successors, (26491), 16773 states have internal predecessors, (26491), 1105 states have call successors, (1105), 140 states have call predecessors, (1105), 140 states have return successors, (1105), 1071 states have call predecessors, (1105), 1105 states have call successors, (1105) [2023-11-06 22:53:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17985 states to 17985 states and 28701 transitions. [2023-11-06 22:53:15,156 INFO L78 Accepts]: Start accepts. Automaton has 17985 states and 28701 transitions. Word has length 495 [2023-11-06 22:53:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:15,157 INFO L495 AbstractCegarLoop]: Abstraction has 17985 states and 28701 transitions. [2023-11-06 22:53:15,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17985 states and 28701 transitions. [2023-11-06 22:53:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-06 22:53:15,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:15,181 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:15,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:15,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:53:15,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:15,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -754957959, now seen corresponding path program 1 times [2023-11-06 22:53:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193338054] [2023-11-06 22:53:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:15,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:15,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521955621] [2023-11-06 22:53:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:15,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:15,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:15,479 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:15,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:53:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:16,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:16,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:16,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:16,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193338054] [2023-11-06 22:53:16,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:16,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521955621] [2023-11-06 22:53:16,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521955621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:16,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:16,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:53:16,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929874900] [2023-11-06 22:53:16,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:16,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:16,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:16,257 INFO L87 Difference]: Start difference. First operand 17985 states and 28701 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:17,402 INFO L93 Difference]: Finished difference Result 35267 states and 56248 transitions. [2023-11-06 22:53:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:53:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-06 22:53:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:17,461 INFO L225 Difference]: With dead ends: 35267 [2023-11-06 22:53:17,461 INFO L226 Difference]: Without dead ends: 22117 [2023-11-06 22:53:17,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:17,485 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 943 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:17,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 1772 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:53:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22117 states. [2023-11-06 22:53:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22117 to 12004. [2023-11-06 22:53:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12004 states, 11336 states have (on average 1.5867148906139732) internal successors, (17987), 11352 states have internal predecessors, (17987), 587 states have call successors, (587), 80 states have call predecessors, (587), 80 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-06 22:53:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12004 states to 12004 states and 19161 transitions. [2023-11-06 22:53:18,555 INFO L78 Accepts]: Start accepts. Automaton has 12004 states and 19161 transitions. Word has length 495 [2023-11-06 22:53:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:18,557 INFO L495 AbstractCegarLoop]: Abstraction has 12004 states and 19161 transitions. [2023-11-06 22:53:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 12004 states and 19161 transitions. [2023-11-06 22:53:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-06 22:53:18,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:18,579 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:18,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:18,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:53:18,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:18,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash -77584711, now seen corresponding path program 1 times [2023-11-06 22:53:18,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:18,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249990454] [2023-11-06 22:53:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:18,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:18,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:18,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044419415] [2023-11-06 22:53:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:18,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:18,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:18,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:53:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:19,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:19,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:19,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:19,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249990454] [2023-11-06 22:53:19,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:19,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044419415] [2023-11-06 22:53:19,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044419415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:19,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:53:19,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030942160] [2023-11-06 22:53:19,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:19,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:19,719 INFO L87 Difference]: Start difference. First operand 12004 states and 19161 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:20,545 INFO L93 Difference]: Finished difference Result 30246 states and 48343 transitions. [2023-11-06 22:53:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:53:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-06 22:53:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:20,591 INFO L225 Difference]: With dead ends: 30246 [2023-11-06 22:53:20,591 INFO L226 Difference]: Without dead ends: 20107 [2023-11-06 22:53:20,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:20,611 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 572 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:20,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1469 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:53:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20107 states. [2023-11-06 22:53:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20107 to 13204. [2023-11-06 22:53:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13204 states, 12536 states have (on average 1.5860721123165284) internal successors, (19883), 12552 states have internal predecessors, (19883), 587 states have call successors, (587), 80 states have call predecessors, (587), 80 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-06 22:53:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13204 states to 13204 states and 21057 transitions. [2023-11-06 22:53:21,446 INFO L78 Accepts]: Start accepts. Automaton has 13204 states and 21057 transitions. Word has length 495 [2023-11-06 22:53:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:21,447 INFO L495 AbstractCegarLoop]: Abstraction has 13204 states and 21057 transitions. [2023-11-06 22:53:21,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 13204 states and 21057 transitions. [2023-11-06 22:53:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-06 22:53:21,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:21,464 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:21,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:21,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:21,678 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:21,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:21,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1173489923, now seen corresponding path program 1 times [2023-11-06 22:53:21,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609137008] [2023-11-06 22:53:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:21,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:21,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:21,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627515520] [2023-11-06 22:53:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:21,762 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:21,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:53:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:22,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:53:22,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:22,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:22,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609137008] [2023-11-06 22:53:22,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627515520] [2023-11-06 22:53:22,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627515520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:22,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:22,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:53:22,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130483458] [2023-11-06 22:53:22,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:22,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:22,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:22,659 INFO L87 Difference]: Start difference. First operand 13204 states and 21057 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:24,320 INFO L93 Difference]: Finished difference Result 27092 states and 43131 transitions. [2023-11-06 22:53:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:53:24,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 496 [2023-11-06 22:53:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:24,352 INFO L225 Difference]: With dead ends: 27092 [2023-11-06 22:53:24,352 INFO L226 Difference]: Without dead ends: 18921 [2023-11-06 22:53:24,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:53:24,366 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 1719 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:24,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1719 Valid, 2946 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:53:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18921 states. [2023-11-06 22:53:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18921 to 12219. [2023-11-06 22:53:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 11711 states have (on average 1.585603278968491) internal successors, (18569), 11721 states have internal predecessors, (18569), 445 states have call successors, (445), 62 states have call predecessors, (445), 62 states have return successors, (445), 435 states have call predecessors, (445), 445 states have call successors, (445) [2023-11-06 22:53:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 19459 transitions. [2023-11-06 22:53:25,115 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 19459 transitions. Word has length 496 [2023-11-06 22:53:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:25,117 INFO L495 AbstractCegarLoop]: Abstraction has 12219 states and 19459 transitions. [2023-11-06 22:53:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 19459 transitions. [2023-11-06 22:53:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-06 22:53:25,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:25,136 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:25,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:53:25,351 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:25,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:25,352 INFO L85 PathProgramCache]: Analyzing trace with hash 206139269, now seen corresponding path program 1 times [2023-11-06 22:53:25,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:25,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019062151] [2023-11-06 22:53:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:25,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:25,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620151272] [2023-11-06 22:53:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:25,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:25,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:25,448 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:53:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:26,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:26,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4254 proven. 135 refuted. 0 times theorem prover too weak. 4995 trivial. 0 not checked. [2023-11-06 22:53:26,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 69 proven. 135 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:53:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019062151] [2023-11-06 22:53:27,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620151272] [2023-11-06 22:53:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620151272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:27,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:27,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948500703] [2023-11-06 22:53:27,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:27,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:27,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:27,233 INFO L87 Difference]: Start difference. First operand 12219 states and 19459 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 22:53:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:28,308 INFO L93 Difference]: Finished difference Result 19660 states and 31254 transitions. [2023-11-06 22:53:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:28,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 496 [2023-11-06 22:53:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:28,324 INFO L225 Difference]: With dead ends: 19660 [2023-11-06 22:53:28,324 INFO L226 Difference]: Without dead ends: 10051 [2023-11-06 22:53:28,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 984 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:53:28,333 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 780 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:28,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1088 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:53:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2023-11-06 22:53:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 8013. [2023-11-06 22:53:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8013 states, 7500 states have (on average 1.5584) internal successors, (11688), 7510 states have internal predecessors, (11688), 445 states have call successors, (445), 67 states have call predecessors, (445), 67 states have return successors, (445), 435 states have call predecessors, (445), 445 states have call successors, (445) [2023-11-06 22:53:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8013 states to 8013 states and 12578 transitions. [2023-11-06 22:53:28,802 INFO L78 Accepts]: Start accepts. Automaton has 8013 states and 12578 transitions. Word has length 496 [2023-11-06 22:53:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:28,803 INFO L495 AbstractCegarLoop]: Abstraction has 8013 states and 12578 transitions. [2023-11-06 22:53:28,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 22:53:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8013 states and 12578 transitions. [2023-11-06 22:53:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-06 22:53:28,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:28,814 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:28,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:29,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:29,023 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:29,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1109339230, now seen corresponding path program 1 times [2023-11-06 22:53:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:29,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754488012] [2023-11-06 22:53:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:29,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:29,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101230240] [2023-11-06 22:53:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:29,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:29,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:53:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:29,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:53:29,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:31,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:31,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754488012] [2023-11-06 22:53:31,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101230240] [2023-11-06 22:53:31,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101230240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:31,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:31,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:53:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207039609] [2023-11-06 22:53:31,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:31,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:31,356 INFO L87 Difference]: Start difference. First operand 8013 states and 12578 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:31,935 INFO L93 Difference]: Finished difference Result 15753 states and 24660 transitions. [2023-11-06 22:53:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:53:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 497 [2023-11-06 22:53:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:31,948 INFO L225 Difference]: With dead ends: 15753 [2023-11-06 22:53:31,948 INFO L226 Difference]: Without dead ends: 8213 [2023-11-06 22:53:31,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:31,957 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 379 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:31,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1389 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:53:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8213 states. [2023-11-06 22:53:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8213 to 8013. [2023-11-06 22:53:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8013 states, 7500 states have (on average 1.5477333333333334) internal successors, (11608), 7510 states have internal predecessors, (11608), 445 states have call successors, (445), 67 states have call predecessors, (445), 67 states have return successors, (445), 435 states have call predecessors, (445), 445 states have call successors, (445) [2023-11-06 22:53:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8013 states to 8013 states and 12498 transitions. [2023-11-06 22:53:32,499 INFO L78 Accepts]: Start accepts. Automaton has 8013 states and 12498 transitions. Word has length 497 [2023-11-06 22:53:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:32,501 INFO L495 AbstractCegarLoop]: Abstraction has 8013 states and 12498 transitions. [2023-11-06 22:53:32,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 8013 states and 12498 transitions. [2023-11-06 22:53:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-06 22:53:32,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:32,515 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:32,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:32,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:32,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:32,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash 735036537, now seen corresponding path program 1 times [2023-11-06 22:53:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:32,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628640870] [2023-11-06 22:53:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:32,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:32,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:32,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874658815] [2023-11-06 22:53:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:32,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:32,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:32,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:53:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:33,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:53:33,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:35,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628640870] [2023-11-06 22:53:35,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874658815] [2023-11-06 22:53:35,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874658815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:35,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:35,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:53:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220813820] [2023-11-06 22:53:35,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:53:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:53:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:53:35,229 INFO L87 Difference]: Start difference. First operand 8013 states and 12498 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 7 states have internal predecessors, (156), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:37,777 INFO L93 Difference]: Finished difference Result 30981 states and 48302 transitions. [2023-11-06 22:53:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:53:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 7 states have internal predecessors, (156), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 498 [2023-11-06 22:53:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:37,812 INFO L225 Difference]: With dead ends: 30981 [2023-11-06 22:53:37,813 INFO L226 Difference]: Without dead ends: 25337 [2023-11-06 22:53:37,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:53:37,826 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 3513 mSDsluCounter, 4564 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 5440 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:37,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 5440 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:53:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25337 states. [2023-11-06 22:53:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25337 to 16583. [2023-11-06 22:53:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16583 states, 15636 states have (on average 1.5535942696341776) internal successors, (24292), 15656 states have internal predecessors, (24292), 821 states have call successors, (821), 125 states have call predecessors, (821), 125 states have return successors, (821), 801 states have call predecessors, (821), 821 states have call successors, (821) [2023-11-06 22:53:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16583 states to 16583 states and 25934 transitions. [2023-11-06 22:53:38,770 INFO L78 Accepts]: Start accepts. Automaton has 16583 states and 25934 transitions. Word has length 498 [2023-11-06 22:53:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:38,771 INFO L495 AbstractCegarLoop]: Abstraction has 16583 states and 25934 transitions. [2023-11-06 22:53:38,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 7 states have internal predecessors, (156), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 16583 states and 25934 transitions. [2023-11-06 22:53:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-06 22:53:38,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:38,788 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:38,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:39,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:53:39,004 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:39,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash 680643639, now seen corresponding path program 1 times [2023-11-06 22:53:39,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:39,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525471562] [2023-11-06 22:53:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:39,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:39,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130829922] [2023-11-06 22:53:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:39,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:39,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:39,079 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:39,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:53:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:39,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:53:39,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 2780 proven. 168 refuted. 0 times theorem prover too weak. 6436 trivial. 0 not checked. [2023-11-06 22:53:40,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 36 proven. 168 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-06 22:53:40,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:40,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525471562] [2023-11-06 22:53:40,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:40,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130829922] [2023-11-06 22:53:40,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130829922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:40,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:40,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:53:40,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200422336] [2023-11-06 22:53:40,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:40,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:53:40,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:53:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:53:40,945 INFO L87 Difference]: Start difference. First operand 16583 states and 25934 transitions. Second operand has 10 states, 10 states have (on average 23.9) internal successors, (239), 10 states have internal predecessors, (239), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-06 22:53:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:42,710 INFO L93 Difference]: Finished difference Result 31691 states and 49492 transitions. [2023-11-06 22:53:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:53:42,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.9) internal successors, (239), 10 states have internal predecessors, (239), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) Word has length 498 [2023-11-06 22:53:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:42,743 INFO L225 Difference]: With dead ends: 31691 [2023-11-06 22:53:42,743 INFO L226 Difference]: Without dead ends: 16805 [2023-11-06 22:53:42,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 986 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:53:42,763 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 305 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:42,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1190 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:53:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2023-11-06 22:53:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 16683. [2023-11-06 22:53:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16683 states, 15711 states have (on average 1.5448411940678506) internal successors, (24271), 15731 states have internal predecessors, (24271), 821 states have call successors, (821), 150 states have call predecessors, (821), 150 states have return successors, (821), 801 states have call predecessors, (821), 821 states have call successors, (821) [2023-11-06 22:53:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16683 states to 16683 states and 25913 transitions. [2023-11-06 22:53:43,791 INFO L78 Accepts]: Start accepts. Automaton has 16683 states and 25913 transitions. Word has length 498 [2023-11-06 22:53:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:43,792 INFO L495 AbstractCegarLoop]: Abstraction has 16683 states and 25913 transitions. [2023-11-06 22:53:43,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.9) internal successors, (239), 10 states have internal predecessors, (239), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-06 22:53:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 16683 states and 25913 transitions. [2023-11-06 22:53:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-06 22:53:43,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:43,806 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:44,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:53:44,022 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:44,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash -535510087, now seen corresponding path program 1 times [2023-11-06 22:53:44,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:44,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107419764] [2023-11-06 22:53:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:44,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:44,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:44,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995471158] [2023-11-06 22:53:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:44,094 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:44,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:53:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:44,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:53:44,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:45,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107419764] [2023-11-06 22:53:45,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:45,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995471158] [2023-11-06 22:53:45,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995471158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:45,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:45,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:53:45,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328992973] [2023-11-06 22:53:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:45,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:53:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:53:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:45,632 INFO L87 Difference]: Start difference. First operand 16683 states and 25913 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:47,154 INFO L93 Difference]: Finished difference Result 44381 states and 68868 transitions. [2023-11-06 22:53:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:53:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 498 [2023-11-06 22:53:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:47,201 INFO L225 Difference]: With dead ends: 44381 [2023-11-06 22:53:47,201 INFO L226 Difference]: Without dead ends: 34443 [2023-11-06 22:53:47,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:47,217 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 586 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:47,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2646 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:53:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34443 states. [2023-11-06 22:53:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34443 to 30239. [2023-11-06 22:53:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30239 states, 28375 states have (on average 1.5370925110132159) internal successors, (43615), 28415 states have internal predecessors, (43615), 1573 states have call successors, (1573), 290 states have call predecessors, (1573), 290 states have return successors, (1573), 1533 states have call predecessors, (1573), 1573 states have call successors, (1573) [2023-11-06 22:53:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30239 states to 30239 states and 46761 transitions. [2023-11-06 22:53:48,736 INFO L78 Accepts]: Start accepts. Automaton has 30239 states and 46761 transitions. Word has length 498 [2023-11-06 22:53:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:48,736 INFO L495 AbstractCegarLoop]: Abstraction has 30239 states and 46761 transitions. [2023-11-06 22:53:48,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 30239 states and 46761 transitions. [2023-11-06 22:53:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-06 22:53:48,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:48,750 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:48,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-06 22:53:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:53:48,961 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:48,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash -794883552, now seen corresponding path program 1 times [2023-11-06 22:53:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764131331] [2023-11-06 22:53:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:48,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:49,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:49,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739265145] [2023-11-06 22:53:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:49,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:49,065 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:49,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:53:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:49,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:53:49,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:50,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:50,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764131331] [2023-11-06 22:53:50,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739265145] [2023-11-06 22:53:50,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739265145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:50,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:50,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:53:50,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550111286] [2023-11-06 22:53:50,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:50,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:53:50,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:53:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:50,016 INFO L87 Difference]: Start difference. First operand 30239 states and 46761 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:51,632 INFO L93 Difference]: Finished difference Result 65435 states and 101063 transitions. [2023-11-06 22:53:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:53:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 499 [2023-11-06 22:53:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:51,693 INFO L225 Difference]: With dead ends: 65435 [2023-11-06 22:53:51,693 INFO L226 Difference]: Without dead ends: 45593 [2023-11-06 22:53:51,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:53:51,717 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 401 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:51,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1911 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:53:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45593 states. [2023-11-06 22:53:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45593 to 45531. [2023-11-06 22:53:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45531 states, 42775 states have (on average 1.5389129164231443) internal successors, (65827), 42835 states have internal predecessors, (65827), 2325 states have call successors, (2325), 430 states have call predecessors, (2325), 430 states have return successors, (2325), 2265 states have call predecessors, (2325), 2325 states have call successors, (2325) [2023-11-06 22:53:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45531 states to 45531 states and 70477 transitions. [2023-11-06 22:53:54,008 INFO L78 Accepts]: Start accepts. Automaton has 45531 states and 70477 transitions. Word has length 499 [2023-11-06 22:53:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:54,009 INFO L495 AbstractCegarLoop]: Abstraction has 45531 states and 70477 transitions. [2023-11-06 22:53:54,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 45531 states and 70477 transitions. [2023-11-06 22:53:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-06 22:53:54,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:54,027 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:54,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:54,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:53:54,238 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:54,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:54,238 INFO L85 PathProgramCache]: Analyzing trace with hash -935432162, now seen corresponding path program 1 times [2023-11-06 22:53:54,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:54,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455549881] [2023-11-06 22:53:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:54,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:54,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:54,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658320526] [2023-11-06 22:53:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:54,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:54,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:54,308 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:54,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:53:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:55,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:53:55,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-06 22:53:56,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455549881] [2023-11-06 22:53:56,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658320526] [2023-11-06 22:53:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658320526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:56,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:56,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:53:56,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138098618] [2023-11-06 22:53:56,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:56,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:56,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:56,942 INFO L87 Difference]: Start difference. First operand 45531 states and 70477 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:53:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:59,131 INFO L93 Difference]: Finished difference Result 92841 states and 143489 transitions. [2023-11-06 22:53:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:53:59,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 499 [2023-11-06 22:53:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:59,191 INFO L225 Difference]: With dead ends: 92841 [2023-11-06 22:53:59,192 INFO L226 Difference]: Without dead ends: 47469 [2023-11-06 22:53:59,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:53:59,217 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 404 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:59,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1363 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:53:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47469 states. [2023-11-06 22:54:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47469 to 45530. [2023-11-06 22:54:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45530 states, 42774 states have (on average 1.5388787581240941) internal successors, (65824), 42834 states have internal predecessors, (65824), 2325 states have call successors, (2325), 430 states have call predecessors, (2325), 430 states have return successors, (2325), 2265 states have call predecessors, (2325), 2325 states have call successors, (2325) [2023-11-06 22:54:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45530 states to 45530 states and 70474 transitions. [2023-11-06 22:54:01,399 INFO L78 Accepts]: Start accepts. Automaton has 45530 states and 70474 transitions. Word has length 499 [2023-11-06 22:54:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:01,400 INFO L495 AbstractCegarLoop]: Abstraction has 45530 states and 70474 transitions. [2023-11-06 22:54:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-06 22:54:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 45530 states and 70474 transitions. [2023-11-06 22:54:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-06 22:54:01,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:01,425 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:01,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:54:01,635 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:01,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1971179436, now seen corresponding path program 1 times [2023-11-06 22:54:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762428333] [2023-11-06 22:54:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:01,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:01,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890782395] [2023-11-06 22:54:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:01,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:01,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:01,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a45ac8-1d80-4fcb-94a1-585952315ea0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:54:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:02,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:54:02,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4736 proven. 174 refuted. 0 times theorem prover too weak. 4474 trivial. 0 not checked. [2023-11-06 22:54:05,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 228 proven. 177 refuted. 0 times theorem prover too weak. 8979 trivial. 0 not checked. [2023-11-06 22:54:12,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762428333] [2023-11-06 22:54:12,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:12,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890782395] [2023-11-06 22:54:12,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890782395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:12,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:12,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2023-11-06 22:54:12,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286979823] [2023-11-06 22:54:12,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:54:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:54:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=811, Unknown=1, NotChecked=0, Total=992 [2023-11-06 22:54:12,241 INFO L87 Difference]: Start difference. First operand 45530 states and 70474 transitions. Second operand has 32 states, 31 states have (on average 8.935483870967742) internal successors, (277), 30 states have internal predecessors, (277), 6 states have call successors, (138), 4 states have call predecessors, (138), 7 states have return successors, (138), 6 states have call predecessors, (138), 6 states have call successors, (138) [2023-11-06 22:54:51,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:54:57,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:55:03,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:55:06,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:55:45,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:56:02,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []