./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro --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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:29:51,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:29:51,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:29:51,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:29:51,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:29:51,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:29:51,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:29:51,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:29:51,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:29:51,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:29:51,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:29:51,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:29:51,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:29:51,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:29:51,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:29:51,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:29:51,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:29:51,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:29:51,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:29:51,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:29:51,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:29:51,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:29:51,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:29:51,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:29:51,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:29:51,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:29:51,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:29:51,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:29:51,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:29:51,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:29:51,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:29:51,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:29:51,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:29:51,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:29:51,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:29:51,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:29:51,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:29:51,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:29:51,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:29:51,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:29:51,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:29:51,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:29:51,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:29:51,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:29:51,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:29:51,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:29:51,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:29:51,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:29:51,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:29:51,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:29:51,411 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:29:51,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:29:51,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:29:51,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:29:51,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:29:51,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:29:51,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:29:51,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:29:51,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:29:51,414 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:29:51,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:29:51,415 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:29:51,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:29:51,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:29:51,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:29:51,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:29:51,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:29:51,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:29:51,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:29:51,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:29:51,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:29:51,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:29:51,418 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:29:51,418 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:29:51,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:29:51,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-11-18 20:29:51,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:29:51,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:29:51,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:29:51,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:29:51,799 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:29:51,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/reducercommutativity/sep.i [2022-11-18 20:29:51,881 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/data/d8c87d470/ad7704177c1140d6a93fc05fddd821b4/FLAG47a44332a [2022-11-18 20:29:52,406 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:29:52,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/sv-benchmarks/c/reducercommutativity/sep.i [2022-11-18 20:29:52,418 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/data/d8c87d470/ad7704177c1140d6a93fc05fddd821b4/FLAG47a44332a [2022-11-18 20:29:52,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/data/d8c87d470/ad7704177c1140d6a93fc05fddd821b4 [2022-11-18 20:29:52,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:29:52,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:29:52,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:29:52,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:29:52,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:29:52,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:29:52" (1/1) ... [2022-11-18 20:29:52,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6961077a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:52, skipping insertion in model container [2022-11-18 20:29:52,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:29:52" (1/1) ... [2022-11-18 20:29:52,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:29:52,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:29:53,048 WARN L234 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_7d51184a-796f-45d5-9026-22948dfac8e9/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-11-18 20:29:53,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:29:53,061 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:29:53,080 WARN L234 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_7d51184a-796f-45d5-9026-22948dfac8e9/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-11-18 20:29:53,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:29:53,096 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:29:53,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53 WrapperNode [2022-11-18 20:29:53,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:29:53,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:29:53,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:29:53,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:29:53,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,150 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-18 20:29:53,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:29:53,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:29:53,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:29:53,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:29:53,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,177 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:29:53,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:29:53,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:29:53,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:29:53,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (1/1) ... [2022-11-18 20:29:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:29:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:53,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:29:53,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:29:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:29:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:29:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:29:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:29:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:29:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:29:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:29:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:29:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-18 20:29:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-18 20:29:53,348 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:29:53,350 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:29:53,527 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:29:53,534 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:29:53,535 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:29:53,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:29:53 BoogieIcfgContainer [2022-11-18 20:29:53,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:29:53,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:29:53,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:29:53,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:29:53,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:29:52" (1/3) ... [2022-11-18 20:29:53,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8d54f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:29:53, skipping insertion in model container [2022-11-18 20:29:53,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:53" (2/3) ... [2022-11-18 20:29:53,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8d54f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:29:53, skipping insertion in model container [2022-11-18 20:29:53,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:29:53" (3/3) ... [2022-11-18 20:29:53,547 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2022-11-18 20:29:53,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:29:53,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:29:53,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:29:53,653 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;@3abd580e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:29:53,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:29:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:29:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:29:53,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:53,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:53,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2022-11-18 20:29:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:53,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011246238] [2022-11-18 20:29:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:29:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:29:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:29:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:29:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011246238] [2022-11-18 20:29:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011246238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432848118] [2022-11-18 20:29:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:54,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:54,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:29:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:29:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:29:54,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:29:54,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432848118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:54,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:29:54,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2022-11-18 20:29:54,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844665801] [2022-11-18 20:29:54,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:54,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:29:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:29:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:29:54,455 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:29:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:54,474 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2022-11-18 20:29:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:29:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-18 20:29:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:54,488 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:29:54,492 INFO L226 Difference]: Without dead ends: 22 [2022-11-18 20:29:54,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:29:54,503 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2022-11-18 20:29:54,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:29:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-18 20:29:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-18 20:29:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:29:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-18 20:29:54,559 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2022-11-18 20:29:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:54,561 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-18 20:29:54,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:29:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-18 20:29:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:29:54,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:54,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:54,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:54,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:54,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2022-11-18 20:29:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:54,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038206428] [2022-11-18 20:29:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:54,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:29:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:29:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:29:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:29:55,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038206428] [2022-11-18 20:29:55,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038206428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496827037] [2022-11-18 20:29:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:55,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:55,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:55,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:29:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:29:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:29:55,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:29:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496827037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:55,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:29:55,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-18 20:29:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385435886] [2022-11-18 20:29:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:55,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:29:55,248 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:29:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:55,322 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-11-18 20:29:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:29:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-18 20:29:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:55,323 INFO L225 Difference]: With dead ends: 43 [2022-11-18 20:29:55,324 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 20:29:55,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:29:55,326 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:55,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:29:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 20:29:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-11-18 20:29:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:29:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-18 20:29:55,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-18 20:29:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:55,344 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-18 20:29:55,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:29:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-18 20:29:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:29:55,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:55,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:55,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:29:55,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:55,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2022-11-18 20:29:55,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893143863] [2022-11-18 20:29:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:29:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:29:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 20:29:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:29:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893143863] [2022-11-18 20:29:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893143863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:55,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:55,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:29:55,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737977757] [2022-11-18 20:29:55,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:55,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:55,776 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:29:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:55,821 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-18 20:29:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:29:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-18 20:29:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:55,823 INFO L225 Difference]: With dead ends: 39 [2022-11-18 20:29:55,823 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 20:29:55,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:55,825 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:55,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:29:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 20:29:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-18 20:29:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:29:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-18 20:29:55,832 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2022-11-18 20:29:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:55,832 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-18 20:29:55,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:29:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-18 20:29:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:29:55,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:55,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:55,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:29:55,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2022-11-18 20:29:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099317595] [2022-11-18 20:29:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:29:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:29:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 20:29:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:29:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099317595] [2022-11-18 20:29:55,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099317595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:55,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620147596] [2022-11-18 20:29:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:55,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:55,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:55,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:56,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:29:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:29:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:29:56,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:29:56,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620147596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:56,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:56,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-11-18 20:29:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192345965] [2022-11-18 20:29:56,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:56,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:29:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:29:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:29:56,360 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:29:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:56,474 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-11-18 20:29:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:29:56,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-18 20:29:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:56,484 INFO L225 Difference]: With dead ends: 49 [2022-11-18 20:29:56,484 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 20:29:56,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:29:56,489 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:56,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 65 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 20:29:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-18 20:29:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:29:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-18 20:29:56,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2022-11-18 20:29:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:56,506 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-18 20:29:56,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:29:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-18 20:29:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:29:56,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:56,512 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:56,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:29:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:56,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2022-11-18 20:29:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:56,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883244764] [2022-11-18 20:29:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:56,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:57,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:29:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:57,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:29:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:29:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:29:58,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883244764] [2022-11-18 20:29:58,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883244764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094410182] [2022-11-18 20:29:58,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:58,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:58,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:58,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:29:58,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:29:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:29:59,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:29:59,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094410182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:59,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:59,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-11-18 20:29:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899903486] [2022-11-18 20:29:59,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:59,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:29:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:29:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:29:59,737 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:29:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:59,947 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-11-18 20:29:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:29:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-18 20:29:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:59,956 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:29:59,956 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 20:29:59,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 15 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:29:59,957 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:59,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 478 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 20:29:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-11-18 20:29:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 20:29:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-11-18 20:29:59,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2022-11-18 20:30:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:00,000 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-11-18 20:30:00,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-11-18 20:30:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:00,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:00,010 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:00,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:00,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2022-11-18 20:30:00,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:00,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251950709] [2022-11-18 20:30:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:01,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:30:02,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251950709] [2022-11-18 20:30:02,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251950709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382160611] [2022-11-18 20:30:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:02,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:02,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:02,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:02,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:30:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:30:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:02,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:30:02,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-18 20:30:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:30:03,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:03,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-18 20:30:03,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-18 20:30:03,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-18 20:30:03,911 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-18 20:30:03,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:30:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:30:04,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382160611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:04,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:04,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 46 [2022-11-18 20:30:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326346878] [2022-11-18 20:30:04,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:04,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:30:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:30:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1807, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:30:04,230 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 46 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:30:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:09,400 INFO L93 Difference]: Finished difference Result 317 states and 471 transitions. [2022-11-18 20:30:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 20:30:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2022-11-18 20:30:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:09,404 INFO L225 Difference]: With dead ends: 317 [2022-11-18 20:30:09,404 INFO L226 Difference]: Without dead ends: 276 [2022-11-18 20:30:09,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3737 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1846, Invalid=11264, Unknown=0, NotChecked=0, Total=13110 [2022-11-18 20:30:09,417 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 514 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:09,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 512 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1180 Invalid, 0 Unknown, 584 Unchecked, 1.4s Time] [2022-11-18 20:30:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-18 20:30:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 199. [2022-11-18 20:30:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 174 states have (on average 1.3218390804597702) internal successors, (230), 178 states have internal predecessors, (230), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (55), 13 states have call predecessors, (55), 13 states have call successors, (55) [2022-11-18 20:30:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 298 transitions. [2022-11-18 20:30:09,500 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 298 transitions. Word has length 48 [2022-11-18 20:30:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:09,501 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 298 transitions. [2022-11-18 20:30:09,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:30:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 298 transitions. [2022-11-18 20:30:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:09,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:09,510 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:09,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:09,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:09,717 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 2 times [2022-11-18 20:30:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:09,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023657428] [2022-11-18 20:30:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:10,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:30:10,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023657428] [2022-11-18 20:30:10,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023657428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178985428] [2022-11-18 20:30:10,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:10,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:10,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:10,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:10,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:30:11,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:30:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:30:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:11,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-11-18 20:30:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:30:11,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:11,739 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-18 20:30:11,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2022-11-18 20:30:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:11,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178985428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:11,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:11,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 24 [2022-11-18 20:30:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116034303] [2022-11-18 20:30:11,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:11,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:30:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:30:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:30:11,824 INFO L87 Difference]: Start difference. First operand 199 states and 298 transitions. Second operand has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 20:30:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:12,841 INFO L93 Difference]: Finished difference Result 473 states and 687 transitions. [2022-11-18 20:30:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:30:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-11-18 20:30:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:12,848 INFO L225 Difference]: With dead ends: 473 [2022-11-18 20:30:12,848 INFO L226 Difference]: Without dead ends: 269 [2022-11-18 20:30:12,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:30:12,851 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 97 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:12,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 328 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 361 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-11-18 20:30:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-18 20:30:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 237. [2022-11-18 20:30:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 207 states have (on average 1.3236714975845412) internal successors, (274), 213 states have internal predecessors, (274), 14 states have call successors, (14), 9 states have call predecessors, (14), 15 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2022-11-18 20:30:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 360 transitions. [2022-11-18 20:30:12,897 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 360 transitions. Word has length 48 [2022-11-18 20:30:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:12,897 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 360 transitions. [2022-11-18 20:30:12,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 20:30:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 360 transitions. [2022-11-18 20:30:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:12,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:12,900 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:12,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:13,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:30:13,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:13,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1548403594, now seen corresponding path program 3 times [2022-11-18 20:30:13,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:13,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248347515] [2022-11-18 20:30:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:13,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:14,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:14,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:14,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:30:14,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:14,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248347515] [2022-11-18 20:30:14,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248347515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:14,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113830883] [2022-11-18 20:30:14,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:14,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:14,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:30:15,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:30:15,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:30:15,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:15,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:15,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-18 20:30:15,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 20:30:15,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:30:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:30:16,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:16,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113830883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:16,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:30:16,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-11-18 20:30:16,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618846761] [2022-11-18 20:30:16,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:16,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:30:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:30:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:30:16,546 INFO L87 Difference]: Start difference. First operand 237 states and 360 transitions. Second operand has 37 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:30:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:23,457 INFO L93 Difference]: Finished difference Result 728 states and 1023 transitions. [2022-11-18 20:30:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-18 20:30:23,457 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-18 20:30:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:23,461 INFO L225 Difference]: With dead ends: 728 [2022-11-18 20:30:23,462 INFO L226 Difference]: Without dead ends: 554 [2022-11-18 20:30:23,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 44 SyntacticMatches, 15 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8762 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1911, Invalid=18681, Unknown=0, NotChecked=0, Total=20592 [2022-11-18 20:30:23,468 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 318 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1450 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:23,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 924 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1001 Invalid, 0 Unknown, 1450 Unchecked, 1.0s Time] [2022-11-18 20:30:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-18 20:30:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 331. [2022-11-18 20:30:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 292 states have (on average 1.3013698630136987) internal successors, (380), 301 states have internal predecessors, (380), 17 states have call successors, (17), 12 states have call predecessors, (17), 21 states have return successors, (76), 17 states have call predecessors, (76), 17 states have call successors, (76) [2022-11-18 20:30:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 473 transitions. [2022-11-18 20:30:23,536 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 473 transitions. Word has length 48 [2022-11-18 20:30:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:23,537 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 473 transitions. [2022-11-18 20:30:23,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:30:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 473 transitions. [2022-11-18 20:30:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:23,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:23,539 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:23,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:23,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2022-11-18 20:30:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:23,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856259163] [2022-11-18 20:30:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:23,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:24,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:24,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:30:24,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856259163] [2022-11-18 20:30:24,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856259163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909708982] [2022-11-18 20:30:24,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:30:24,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:24,434 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:24,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:30:24,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:30:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:30:24,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:30:24,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:30:25,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909708982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:25,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:25,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-11-18 20:30:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460854625] [2022-11-18 20:30:25,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:25,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:30:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:30:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:30:25,253 INFO L87 Difference]: Start difference. First operand 331 states and 473 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:25,530 INFO L93 Difference]: Finished difference Result 588 states and 929 transitions. [2022-11-18 20:30:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:30:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-18 20:30:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:25,541 INFO L225 Difference]: With dead ends: 588 [2022-11-18 20:30:25,542 INFO L226 Difference]: Without dead ends: 584 [2022-11-18 20:30:25,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:30:25,545 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:25,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 529 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:30:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-18 20:30:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 474. [2022-11-18 20:30:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 420 states have (on average 1.3452380952380953) internal successors, (565), 437 states have internal predecessors, (565), 24 states have call successors, (24), 12 states have call predecessors, (24), 29 states have return successors, (122), 24 states have call predecessors, (122), 24 states have call successors, (122) [2022-11-18 20:30:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 711 transitions. [2022-11-18 20:30:25,704 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 711 transitions. Word has length 48 [2022-11-18 20:30:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:25,705 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 711 transitions. [2022-11-18 20:30:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 711 transitions. [2022-11-18 20:30:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:25,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:25,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:25,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:25,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:25,921 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2022-11-18 20:30:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:25,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516512541] [2022-11-18 20:30:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:26,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:26,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:26,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:30:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516512541] [2022-11-18 20:30:27,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516512541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:27,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892038461] [2022-11-18 20:30:27,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:30:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:27,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:27,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:30:27,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 20:30:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:30:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:27,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:27,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2022-11-18 20:30:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:27,599 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 20:30:27,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-11-18 20:30:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:30:27,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:28,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-18 20:30:28,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-11-18 20:30:28,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:28,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-18 20:30:28,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-18 20:30:28,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:28,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-11-18 20:30:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:30:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892038461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:28,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:28,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 14] total 42 [2022-11-18 20:30:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859076346] [2022-11-18 20:30:28,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:30:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:28,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:30:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:30:28,742 INFO L87 Difference]: Start difference. First operand 474 states and 711 transitions. Second operand has 42 states, 40 states have (on average 2.5) internal successors, (100), 38 states have internal predecessors, (100), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 20:30:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:30,831 INFO L93 Difference]: Finished difference Result 986 states and 1438 transitions. [2022-11-18 20:30:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 20:30:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.5) internal successors, (100), 38 states have internal predecessors, (100), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 48 [2022-11-18 20:30:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:30,837 INFO L225 Difference]: With dead ends: 986 [2022-11-18 20:30:30,837 INFO L226 Difference]: Without dead ends: 757 [2022-11-18 20:30:30,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=515, Invalid=3907, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 20:30:30,840 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:30,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 511 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 576 Invalid, 0 Unknown, 383 Unchecked, 0.5s Time] [2022-11-18 20:30:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-18 20:30:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 674. [2022-11-18 20:30:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 597 states have (on average 1.3601340033500837) internal successors, (812), 627 states have internal predecessors, (812), 32 states have call successors, (32), 17 states have call predecessors, (32), 44 states have return successors, (138), 29 states have call predecessors, (138), 32 states have call successors, (138) [2022-11-18 20:30:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 982 transitions. [2022-11-18 20:30:30,995 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 982 transitions. Word has length 48 [2022-11-18 20:30:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:30,995 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 982 transitions. [2022-11-18 20:30:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.5) internal successors, (100), 38 states have internal predecessors, (100), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 20:30:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 982 transitions. [2022-11-18 20:30:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:30,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:30,999 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:31,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:31,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash -779053714, now seen corresponding path program 6 times [2022-11-18 20:30:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:31,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252392685] [2022-11-18 20:30:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:31,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:31,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:31,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:30:32,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:32,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252392685] [2022-11-18 20:30:32,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252392685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:32,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052401769] [2022-11-18 20:30:32,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:30:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:32,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:32,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:30:32,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:30:32,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:30:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:32,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-18 20:30:32,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:32,933 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 20:30:32,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-18 20:30:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:33,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:33,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:33,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:33,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 52 [2022-11-18 20:30:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:30:33,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:34,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052401769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:34,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:30:34,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2022-11-18 20:30:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589301540] [2022-11-18 20:30:34,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:34,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:30:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:30:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:30:34,004 INFO L87 Difference]: Start difference. First operand 674 states and 982 transitions. Second operand has 33 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 20:30:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:36,450 INFO L93 Difference]: Finished difference Result 907 states and 1321 transitions. [2022-11-18 20:30:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:30:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-11-18 20:30:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:36,456 INFO L225 Difference]: With dead ends: 907 [2022-11-18 20:30:36,456 INFO L226 Difference]: Without dead ends: 769 [2022-11-18 20:30:36,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=600, Invalid=4512, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 20:30:36,459 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:36,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 406 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 406 Invalid, 0 Unknown, 360 Unchecked, 0.3s Time] [2022-11-18 20:30:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-11-18 20:30:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 730. [2022-11-18 20:30:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 644 states have (on average 1.3509316770186335) internal successors, (870), 678 states have internal predecessors, (870), 38 states have call successors, (38), 21 states have call predecessors, (38), 47 states have return successors, (156), 30 states have call predecessors, (156), 38 states have call successors, (156) [2022-11-18 20:30:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1064 transitions. [2022-11-18 20:30:36,672 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1064 transitions. Word has length 48 [2022-11-18 20:30:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:36,673 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1064 transitions. [2022-11-18 20:30:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 20:30:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1064 transitions. [2022-11-18 20:30:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:30:36,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:36,677 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:36,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:36,883 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2022-11-18 20:30:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395396233] [2022-11-18 20:30:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:30:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395396233] [2022-11-18 20:30:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395396233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529954146] [2022-11-18 20:30:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:37,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:37,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:37,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:30:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:30:37,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:30:38,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:30:38,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529954146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:38,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:38,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2022-11-18 20:30:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966096482] [2022-11-18 20:30:38,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:38,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:30:38,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:30:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:30:38,415 INFO L87 Difference]: Start difference. First operand 730 states and 1064 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:38,817 INFO L93 Difference]: Finished difference Result 1105 states and 1760 transitions. [2022-11-18 20:30:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:30:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-18 20:30:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:38,826 INFO L225 Difference]: With dead ends: 1105 [2022-11-18 20:30:38,826 INFO L226 Difference]: Without dead ends: 1101 [2022-11-18 20:30:38,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:30:38,829 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:38,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 548 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:30:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-11-18 20:30:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 883. [2022-11-18 20:30:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 783 states have (on average 1.3780332056194124) internal successors, (1079), 826 states have internal predecessors, (1079), 43 states have call successors, (43), 21 states have call predecessors, (43), 56 states have return successors, (202), 35 states have call predecessors, (202), 43 states have call successors, (202) [2022-11-18 20:30:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1324 transitions. [2022-11-18 20:30:39,122 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1324 transitions. Word has length 48 [2022-11-18 20:30:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:39,123 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1324 transitions. [2022-11-18 20:30:39,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1324 transitions. [2022-11-18 20:30:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:30:39,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:39,127 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:39,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:39,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:30:39,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash -369603060, now seen corresponding path program 7 times [2022-11-18 20:30:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:39,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431203968] [2022-11-18 20:30:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:39,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 20:30:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 46 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:30:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431203968] [2022-11-18 20:30:39,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431203968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78920702] [2022-11-18 20:30:39,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:30:39,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:39,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:39,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:30:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:30:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:30:39,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:30:39,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78920702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:39,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:39,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-11-18 20:30:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078199753] [2022-11-18 20:30:39,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:39,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:30:39,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:30:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:30:39,777 INFO L87 Difference]: Start difference. First operand 883 states and 1324 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:30:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:40,068 INFO L93 Difference]: Finished difference Result 1134 states and 1659 transitions. [2022-11-18 20:30:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:30:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-11-18 20:30:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:40,074 INFO L225 Difference]: With dead ends: 1134 [2022-11-18 20:30:40,075 INFO L226 Difference]: Without dead ends: 887 [2022-11-18 20:30:40,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:30:40,078 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:40,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 111 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:30:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-18 20:30:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 816. [2022-11-18 20:30:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 724 states have (on average 1.356353591160221) internal successors, (982), 761 states have internal predecessors, (982), 37 states have call successors, (37), 19 states have call predecessors, (37), 54 states have return successors, (174), 35 states have call predecessors, (174), 37 states have call successors, (174) [2022-11-18 20:30:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1193 transitions. [2022-11-18 20:30:40,274 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1193 transitions. Word has length 50 [2022-11-18 20:30:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:40,274 INFO L495 AbstractCegarLoop]: Abstraction has 816 states and 1193 transitions. [2022-11-18 20:30:40,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:30:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1193 transitions. [2022-11-18 20:30:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 20:30:40,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:40,278 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:40,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:40,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:30:40,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2022-11-18 20:30:40,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:40,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800563509] [2022-11-18 20:30:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:40,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:40,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:30:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:30:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:30:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800563509] [2022-11-18 20:30:40,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800563509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684938119] [2022-11-18 20:30:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:40,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:40,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:30:40,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:30:40,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:30:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:30:40,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:30:41,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684938119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:41,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:41,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2022-11-18 20:30:41,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559062929] [2022-11-18 20:30:41,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:30:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:30:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:30:41,043 INFO L87 Difference]: Start difference. First operand 816 states and 1193 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:30:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:41,472 INFO L93 Difference]: Finished difference Result 1139 states and 1637 transitions. [2022-11-18 20:30:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:30:41,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-11-18 20:30:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:41,477 INFO L225 Difference]: With dead ends: 1139 [2022-11-18 20:30:41,477 INFO L226 Difference]: Without dead ends: 499 [2022-11-18 20:30:41,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:30:41,480 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:41,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 269 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:30:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-18 20:30:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 452. [2022-11-18 20:30:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 406 states have (on average 1.3719211822660098) internal successors, (557), 425 states have internal predecessors, (557), 18 states have call successors, (18), 8 states have call predecessors, (18), 27 states have return successors, (101), 18 states have call predecessors, (101), 18 states have call successors, (101) [2022-11-18 20:30:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 676 transitions. [2022-11-18 20:30:41,586 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 676 transitions. Word has length 51 [2022-11-18 20:30:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:41,586 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 676 transitions. [2022-11-18 20:30:41,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:30:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 676 transitions. [2022-11-18 20:30:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:30:41,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:41,589 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:41,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:41,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:30:41,808 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2022-11-18 20:30:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:41,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941369796] [2022-11-18 20:30:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:41,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:42,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:30:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:30:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:30:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941369796] [2022-11-18 20:30:42,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941369796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054905184] [2022-11-18 20:30:42,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:30:42,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:42,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:42,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:42,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:30:42,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:30:42,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:30:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:30:43,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:30:43,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054905184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:43,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-11-18 20:30:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449868687] [2022-11-18 20:30:43,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:30:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:30:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:30:43,698 INFO L87 Difference]: Start difference. First operand 452 states and 676 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:44,024 INFO L93 Difference]: Finished difference Result 642 states and 1125 transitions. [2022-11-18 20:30:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:30:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-11-18 20:30:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:44,031 INFO L225 Difference]: With dead ends: 642 [2022-11-18 20:30:44,031 INFO L226 Difference]: Without dead ends: 638 [2022-11-18 20:30:44,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:30:44,033 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:44,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 787 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:30:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-18 20:30:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 530. [2022-11-18 20:30:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 477 states have (on average 1.3878406708595388) internal successors, (662), 500 states have internal predecessors, (662), 21 states have call successors, (21), 8 states have call predecessors, (21), 31 states have return successors, (145), 21 states have call predecessors, (145), 21 states have call successors, (145) [2022-11-18 20:30:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 828 transitions. [2022-11-18 20:30:44,178 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 828 transitions. Word has length 59 [2022-11-18 20:30:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:44,178 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 828 transitions. [2022-11-18 20:30:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:30:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 828 transitions. [2022-11-18 20:30:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:30:44,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:44,182 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:44,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:30:44,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 8 times [2022-11-18 20:30:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:44,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10285645] [2022-11-18 20:30:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:30:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:45,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:30:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:30:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10285645] [2022-11-18 20:30:45,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10285645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:45,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103872143] [2022-11-18 20:30:45,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:45,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:45,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:45,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:30:45,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:30:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:30:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:46,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-18 20:30:46,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-18 20:30:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:46,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:46,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-18 20:30:46,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-18 20:30:47,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-18 20:30:47,326 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-18 20:30:47,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:30:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:30:47,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103872143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:47,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:47,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 19] total 47 [2022-11-18 20:30:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286382724] [2022-11-18 20:30:47,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:30:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:30:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:30:47,587 INFO L87 Difference]: Start difference. First operand 530 states and 828 transitions. Second operand has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:30:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:55,174 INFO L93 Difference]: Finished difference Result 1853 states and 2930 transitions. [2022-11-18 20:30:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-18 20:30:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2022-11-18 20:30:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:55,184 INFO L225 Difference]: With dead ends: 1853 [2022-11-18 20:30:55,184 INFO L226 Difference]: Without dead ends: 1471 [2022-11-18 20:30:55,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8523 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2672, Invalid=22768, Unknown=0, NotChecked=0, Total=25440 [2022-11-18 20:30:55,191 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 503 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 853 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:55,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 540 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1619 Invalid, 0 Unknown, 853 Unchecked, 1.5s Time] [2022-11-18 20:30:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-11-18 20:30:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 965. [2022-11-18 20:30:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 874 states have (on average 1.3935926773455378) internal successors, (1218), 917 states have internal predecessors, (1218), 32 states have call successors, (32), 16 states have call predecessors, (32), 58 states have return successors, (279), 31 states have call predecessors, (279), 32 states have call successors, (279) [2022-11-18 20:30:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1529 transitions. [2022-11-18 20:30:55,425 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1529 transitions. Word has length 59 [2022-11-18 20:30:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:55,426 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 1529 transitions. [2022-11-18 20:30:55,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:30:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1529 transitions. [2022-11-18 20:30:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:30:55,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:55,431 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:55,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:55,632 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:30:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 9 times [2022-11-18 20:30:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:55,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5136189] [2022-11-18 20:30:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:30:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:56,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:30:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:56,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:30:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:30:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5136189] [2022-11-18 20:30:57,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5136189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423914447] [2022-11-18 20:30:57,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:57,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:57,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:57,211 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:57,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:30:57,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:30:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 20:30:57,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:57,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:30:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:57,812 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-18 20:30:57,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-11-18 20:30:58,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:58,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:58,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:58,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-11-18 20:30:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 81 proven. 59 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:30:58,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:58,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423914447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:58,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:30:58,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 39 [2022-11-18 20:30:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083813621] [2022-11-18 20:30:58,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:30:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:30:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:30:58,898 INFO L87 Difference]: Start difference. First operand 965 states and 1529 transitions. Second operand has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:31:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:01,675 INFO L93 Difference]: Finished difference Result 1876 states and 3263 transitions. [2022-11-18 20:31:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:31:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2022-11-18 20:31:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:01,686 INFO L225 Difference]: With dead ends: 1876 [2022-11-18 20:31:01,686 INFO L226 Difference]: Without dead ends: 1797 [2022-11-18 20:31:01,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=720, Invalid=6420, Unknown=0, NotChecked=0, Total=7140 [2022-11-18 20:31:01,691 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:01,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 258 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 432 Unchecked, 0.2s Time] [2022-11-18 20:31:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-11-18 20:31:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1614. [2022-11-18 20:31:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1474 states have (on average 1.3778833107191315) internal successors, (2031), 1533 states have internal predecessors, (2031), 57 states have call successors, (57), 24 states have call predecessors, (57), 82 states have return successors, (603), 56 states have call predecessors, (603), 57 states have call successors, (603) [2022-11-18 20:31:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2691 transitions. [2022-11-18 20:31:02,243 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2691 transitions. Word has length 59 [2022-11-18 20:31:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:02,244 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2691 transitions. [2022-11-18 20:31:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:31:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2691 transitions. [2022-11-18 20:31:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:31:02,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:02,251 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:02,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:31:02,457 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1521916736, now seen corresponding path program 10 times [2022-11-18 20:31:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843871140] [2022-11-18 20:31:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:02,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:31:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:03,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:31:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:03,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:31:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:31:03,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843871140] [2022-11-18 20:31:03,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843871140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527842891] [2022-11-18 20:31:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:31:03,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:03,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:03,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:31:03,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:31:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:03,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:31:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:04,022 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 20:31:04,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-18 20:31:04,161 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-18 20:31:04,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 46 [2022-11-18 20:31:04,453 INFO L321 Elim1Store]: treesize reduction 125, result has 10.7 percent of original size [2022-11-18 20:31:04,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 39 [2022-11-18 20:31:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:15,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:35,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-11-18 20:31:35,309 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-18 20:31:35,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 223 [2022-11-18 20:31:35,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:35,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 66 [2022-11-18 20:31:35,980 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:31:35,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 454 treesize of output 418 [2022-11-18 20:31:36,071 INFO L321 Elim1Store]: treesize reduction 10, result has 76.2 percent of original size [2022-11-18 20:31:36,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 235 treesize of output 242 [2022-11-18 20:31:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 141 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:31:39,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527842891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:39,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:39,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 24] total 58 [2022-11-18 20:31:39,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33388792] [2022-11-18 20:31:39,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-18 20:31:39,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-18 20:31:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3020, Unknown=13, NotChecked=0, Total=3306 [2022-11-18 20:31:39,250 INFO L87 Difference]: Start difference. First operand 1614 states and 2691 transitions. Second operand has 58 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 57 states have internal predecessors, (129), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-18 20:32:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:18,840 INFO L93 Difference]: Finished difference Result 3873 states and 6711 transitions. [2022-11-18 20:32:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-18 20:32:18,841 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 57 states have internal predecessors, (129), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 59 [2022-11-18 20:32:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:18,865 INFO L225 Difference]: With dead ends: 3873 [2022-11-18 20:32:18,865 INFO L226 Difference]: Without dead ends: 3580 [2022-11-18 20:32:18,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7223 ImplicationChecksByTransitivity, 70.4s TimeCoverageRelationStatistics Valid=2289, Invalid=18570, Unknown=21, NotChecked=0, Total=20880 [2022-11-18 20:32:18,873 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 422 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 958 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:18,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 720 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1636 Invalid, 0 Unknown, 958 Unchecked, 2.2s Time] [2022-11-18 20:32:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2022-11-18 20:32:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 2220. [2022-11-18 20:32:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2026 states have (on average 1.357847976307996) internal successors, (2751), 2110 states have internal predecessors, (2751), 75 states have call successors, (75), 39 states have call predecessors, (75), 118 states have return successors, (812), 70 states have call predecessors, (812), 75 states have call successors, (812) [2022-11-18 20:32:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3638 transitions. [2022-11-18 20:32:19,698 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3638 transitions. Word has length 59 [2022-11-18 20:32:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:19,699 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3638 transitions. [2022-11-18 20:32:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 57 states have internal predecessors, (129), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-18 20:32:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3638 transitions. [2022-11-18 20:32:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:32:19,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:19,710 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:19,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:19,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:32:19,915 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 467228480, now seen corresponding path program 11 times [2022-11-18 20:32:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:19,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989104010] [2022-11-18 20:32:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:20,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:32:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:21,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:32:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:21,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:32:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:32:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989104010] [2022-11-18 20:32:21,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989104010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423244548] [2022-11-18 20:32:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:32:21,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:21,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:21,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:32:21,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:32:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:32:21,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:22,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:32:22,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2022-11-18 20:32:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 85 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:32:22,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:23,435 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-18 20:32:23,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:32:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 130 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:32:23,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423244548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:23,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:23,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 43 [2022-11-18 20:32:23,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786819070] [2022-11-18 20:32:23,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:23,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:32:23,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:32:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:32:23,609 INFO L87 Difference]: Start difference. First operand 2220 states and 3638 transitions. Second operand has 43 states, 41 states have (on average 2.707317073170732) internal successors, (111), 42 states have internal predecessors, (111), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:32:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:30,935 INFO L93 Difference]: Finished difference Result 3841 states and 6461 transitions. [2022-11-18 20:32:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-18 20:32:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.707317073170732) internal successors, (111), 42 states have internal predecessors, (111), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 59 [2022-11-18 20:32:30,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:30,954 INFO L225 Difference]: With dead ends: 3841 [2022-11-18 20:32:30,955 INFO L226 Difference]: Without dead ends: 2929 [2022-11-18 20:32:30,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1055, Invalid=10075, Unknown=0, NotChecked=0, Total=11130 [2022-11-18 20:32:30,965 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 378 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:30,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 536 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 845 Invalid, 0 Unknown, 497 Unchecked, 1.0s Time] [2022-11-18 20:32:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2022-11-18 20:32:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2402. [2022-11-18 20:32:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2181 states have (on average 1.3484640073360843) internal successors, (2941), 2285 states have internal predecessors, (2941), 86 states have call successors, (86), 39 states have call predecessors, (86), 134 states have return successors, (844), 77 states have call predecessors, (844), 86 states have call successors, (844) [2022-11-18 20:32:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3871 transitions. [2022-11-18 20:32:31,868 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3871 transitions. Word has length 59 [2022-11-18 20:32:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:31,868 INFO L495 AbstractCegarLoop]: Abstraction has 2402 states and 3871 transitions. [2022-11-18 20:32:31,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.707317073170732) internal successors, (111), 42 states have internal predecessors, (111), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:32:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3871 transitions. [2022-11-18 20:32:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:32:31,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:31,878 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:31,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:32,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:32,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1426993792, now seen corresponding path program 12 times [2022-11-18 20:32:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:32,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612864281] [2022-11-18 20:32:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:32:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:32,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:32:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:32:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 97 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 20:32:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612864281] [2022-11-18 20:32:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612864281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837363853] [2022-11-18 20:32:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:32:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:32,935 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:32,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:32:33,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-18 20:32:33,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:32:33,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:32:33,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 90 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:32:34,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837363853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:34,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:34,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2022-11-18 20:32:34,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119749547] [2022-11-18 20:32:34,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:34,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:32:34,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:32:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:32:34,407 INFO L87 Difference]: Start difference. First operand 2402 states and 3871 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:32:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:35,252 INFO L93 Difference]: Finished difference Result 2870 states and 5096 transitions. [2022-11-18 20:32:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:32:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2022-11-18 20:32:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:35,271 INFO L225 Difference]: With dead ends: 2870 [2022-11-18 20:32:35,271 INFO L226 Difference]: Without dead ends: 2866 [2022-11-18 20:32:35,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:32:35,277 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 29 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:35,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 574 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:32:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-11-18 20:32:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2482. [2022-11-18 20:32:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2250 states have (on average 1.3493333333333333) internal successors, (3036), 2362 states have internal predecessors, (3036), 91 states have call successors, (91), 39 states have call predecessors, (91), 140 states have return successors, (958), 80 states have call predecessors, (958), 91 states have call successors, (958) [2022-11-18 20:32:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 4085 transitions. [2022-11-18 20:32:36,143 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 4085 transitions. Word has length 59 [2022-11-18 20:32:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:36,143 INFO L495 AbstractCegarLoop]: Abstraction has 2482 states and 4085 transitions. [2022-11-18 20:32:36,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:32:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 4085 transitions. [2022-11-18 20:32:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:32:36,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:36,153 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:36,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:36,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:36,359 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash 998768126, now seen corresponding path program 13 times [2022-11-18 20:32:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:36,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574892618] [2022-11-18 20:32:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:32:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:32:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:32:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 98 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:32:38,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:38,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574892618] [2022-11-18 20:32:38,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574892618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:38,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376593219] [2022-11-18 20:32:38,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:32:38,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:38,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:38,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:32:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:32:38,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:38,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 20:32:38,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-18 20:32:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:32:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:39,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-18 20:32:39,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-18 20:32:39,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-18 20:32:40,202 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-18 20:32:40,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:32:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:32:40,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376593219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:40,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:40,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 19] total 51 [2022-11-18 20:32:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803839335] [2022-11-18 20:32:40,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:40,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 20:32:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 20:32:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2332, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:32:40,518 INFO L87 Difference]: Start difference. First operand 2482 states and 4085 transitions. Second operand has 51 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:32:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:55,645 INFO L93 Difference]: Finished difference Result 3949 states and 6451 transitions. [2022-11-18 20:32:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-18 20:32:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2022-11-18 20:32:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:55,659 INFO L225 Difference]: With dead ends: 3949 [2022-11-18 20:32:55,659 INFO L226 Difference]: Without dead ends: 2755 [2022-11-18 20:32:55,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14397 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=3484, Invalid=35128, Unknown=0, NotChecked=0, Total=38612 [2022-11-18 20:32:55,708 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 350 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 4578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1337 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:55,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 990 Invalid, 4578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 3062 Invalid, 0 Unknown, 1337 Unchecked, 3.3s Time] [2022-11-18 20:32:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-18 20:32:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2244. [2022-11-18 20:32:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2028 states have (on average 1.3284023668639053) internal successors, (2694), 2133 states have internal predecessors, (2694), 77 states have call successors, (77), 41 states have call predecessors, (77), 138 states have return successors, (694), 69 states have call predecessors, (694), 77 states have call successors, (694) [2022-11-18 20:32:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3465 transitions. [2022-11-18 20:32:56,383 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3465 transitions. Word has length 59 [2022-11-18 20:32:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:56,383 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 3465 transitions. [2022-11-18 20:32:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:32:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3465 transitions. [2022-11-18 20:32:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:32:56,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:56,388 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:56,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:56,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:56,588 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1678826496, now seen corresponding path program 14 times [2022-11-18 20:32:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:56,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915360844] [2022-11-18 20:32:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:32:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:57,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:32:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:57,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:32:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:32:57,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915360844] [2022-11-18 20:32:57,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915360844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983241852] [2022-11-18 20:32:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:32:57,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:57,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:57,555 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:57,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:32:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:32:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:32:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:32:58,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:32:58,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983241852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:58,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:58,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-11-18 20:32:58,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084338952] [2022-11-18 20:32:58,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:58,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:32:58,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:32:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:32:58,770 INFO L87 Difference]: Start difference. First operand 2244 states and 3465 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:32:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:59,894 INFO L93 Difference]: Finished difference Result 3464 states and 6039 transitions. [2022-11-18 20:32:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:32:59,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-11-18 20:32:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:59,918 INFO L225 Difference]: With dead ends: 3464 [2022-11-18 20:32:59,919 INFO L226 Difference]: Without dead ends: 3460 [2022-11-18 20:32:59,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:32:59,924 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 37 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:59,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 781 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:32:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-11-18 20:33:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2747. [2022-11-18 20:33:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2496 states have (on average 1.360977564102564) internal successors, (3397), 2624 states have internal predecessors, (3397), 91 states have call successors, (91), 41 states have call predecessors, (91), 159 states have return successors, (866), 81 states have call predecessors, (866), 91 states have call successors, (866) [2022-11-18 20:33:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4354 transitions. [2022-11-18 20:33:00,990 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4354 transitions. Word has length 59 [2022-11-18 20:33:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:00,991 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 4354 transitions. [2022-11-18 20:33:00,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:33:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4354 transitions. [2022-11-18 20:33:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:33:00,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:00,998 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:01,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:01,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:33:01,199 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1936991934, now seen corresponding path program 15 times [2022-11-18 20:33:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:01,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446515366] [2022-11-18 20:33:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:33:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:02,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:33:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:33:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:33:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446515366] [2022-11-18 20:33:03,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446515366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706598108] [2022-11-18 20:33:03,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:33:03,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:03,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:03,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:33:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:33:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:33:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:03,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2022-11-18 20:33:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:04,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:33:04,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:33:04,224 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 20:33:04,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-11-18 20:33:04,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:33:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:33:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:04,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:33:04,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-11-18 20:33:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 2 proven. 139 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:33:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:05,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706598108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:05,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:33:05,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 41 [2022-11-18 20:33:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052236267] [2022-11-18 20:33:05,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:05,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:33:05,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:33:05,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:33:05,731 INFO L87 Difference]: Start difference. First operand 2747 states and 4354 transitions. Second operand has 41 states, 38 states have (on average 2.289473684210526) internal successors, (87), 40 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:33:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:11,821 INFO L93 Difference]: Finished difference Result 4745 states and 8644 transitions. [2022-11-18 20:33:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-18 20:33:11,822 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.289473684210526) internal successors, (87), 40 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2022-11-18 20:33:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:11,845 INFO L225 Difference]: With dead ends: 4745 [2022-11-18 20:33:11,845 INFO L226 Difference]: Without dead ends: 4706 [2022-11-18 20:33:11,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=981, Invalid=11009, Unknown=0, NotChecked=0, Total=11990 [2022-11-18 20:33:11,852 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 734 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:11,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 552 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 391 Invalid, 0 Unknown, 734 Unchecked, 0.4s Time] [2022-11-18 20:33:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2022-11-18 20:33:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 3605. [2022-11-18 20:33:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3263 states have (on average 1.3502911431198283) internal successors, (4406), 3428 states have internal predecessors, (4406), 139 states have call successors, (139), 47 states have call predecessors, (139), 202 states have return successors, (1430), 129 states have call predecessors, (1430), 139 states have call successors, (1430) [2022-11-18 20:33:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5975 transitions. [2022-11-18 20:33:13,143 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5975 transitions. Word has length 59 [2022-11-18 20:33:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:13,144 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 5975 transitions. [2022-11-18 20:33:13,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.289473684210526) internal successors, (87), 40 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:33:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5975 transitions. [2022-11-18 20:33:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:33:13,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:13,154 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:13,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:13,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:33:13,355 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1325738114, now seen corresponding path program 16 times [2022-11-18 20:33:13,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:13,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993505880] [2022-11-18 20:33:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:14,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:33:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:14,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:33:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:14,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:33:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:33:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993505880] [2022-11-18 20:33:15,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993505880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231449271] [2022-11-18 20:33:15,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:33:15,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:15,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:15,051 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:15,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:33:15,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:33:15,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:15,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:33:15,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:15,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:15,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:15,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:15,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2022-11-18 20:33:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:33:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:33:16,421 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-18 20:33:16,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2022-11-18 20:33:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 84 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:33:16,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:17,187 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-18 20:33:17,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:33:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 130 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:33:17,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231449271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:17,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:17,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 47 [2022-11-18 20:33:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657869872] [2022-11-18 20:33:17,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:17,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:33:17,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:33:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:33:17,365 INFO L87 Difference]: Start difference. First operand 3605 states and 5975 transitions. Second operand has 47 states, 45 states have (on average 2.511111111111111) internal successors, (113), 46 states have internal predecessors, (113), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:33:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:27,371 INFO L93 Difference]: Finished difference Result 5626 states and 10491 transitions. [2022-11-18 20:33:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-18 20:33:27,372 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.511111111111111) internal successors, (113), 46 states have internal predecessors, (113), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 59 [2022-11-18 20:33:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:27,393 INFO L225 Difference]: With dead ends: 5626 [2022-11-18 20:33:27,393 INFO L226 Difference]: Without dead ends: 5135 [2022-11-18 20:33:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5106 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1521, Invalid=13241, Unknown=0, NotChecked=0, Total=14762 [2022-11-18 20:33:27,402 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 271 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 694 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:27,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 884 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1506 Invalid, 0 Unknown, 694 Unchecked, 1.8s Time] [2022-11-18 20:33:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2022-11-18 20:33:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 3960. [2022-11-18 20:33:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3568 states have (on average 1.3427690582959642) internal successors, (4791), 3751 states have internal predecessors, (4791), 155 states have call successors, (155), 47 states have call predecessors, (155), 236 states have return successors, (1781), 161 states have call predecessors, (1781), 155 states have call successors, (1781) [2022-11-18 20:33:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 6727 transitions. [2022-11-18 20:33:28,955 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 6727 transitions. Word has length 59 [2022-11-18 20:33:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:28,955 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 6727 transitions. [2022-11-18 20:33:28,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.511111111111111) internal successors, (113), 46 states have internal predecessors, (113), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:33:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 6727 transitions. [2022-11-18 20:33:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:33:28,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:28,973 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:28,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:29,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:29,175 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2009463870, now seen corresponding path program 17 times [2022-11-18 20:33:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805446159] [2022-11-18 20:33:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:33:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:29,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:33:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:29,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:33:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:33:29,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:29,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805446159] [2022-11-18 20:33:29,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805446159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171023453] [2022-11-18 20:33:29,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:33:29,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:29,923 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:29,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:33:30,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:33:30,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:33:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:33:30,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:33:31,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171023453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:31,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:31,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2022-11-18 20:33:31,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042482974] [2022-11-18 20:33:31,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:31,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:33:31,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:33:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:33:31,409 INFO L87 Difference]: Start difference. First operand 3960 states and 6727 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:33:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:33,054 INFO L93 Difference]: Finished difference Result 4512 states and 8114 transitions. [2022-11-18 20:33:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:33:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-11-18 20:33:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:33,077 INFO L225 Difference]: With dead ends: 4512 [2022-11-18 20:33:33,077 INFO L226 Difference]: Without dead ends: 4508 [2022-11-18 20:33:33,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 19 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:33:33,087 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 27 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:33,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 642 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:33:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-11-18 20:33:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4106. [2022-11-18 20:33:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 3683 states have (on average 1.339397230518599) internal successors, (4933), 3888 states have internal predecessors, (4933), 167 states have call successors, (167), 47 states have call predecessors, (167), 255 states have return successors, (2133), 170 states have call predecessors, (2133), 167 states have call successors, (2133) [2022-11-18 20:33:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 7233 transitions. [2022-11-18 20:33:34,608 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 7233 transitions. Word has length 59 [2022-11-18 20:33:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:34,609 INFO L495 AbstractCegarLoop]: Abstraction has 4106 states and 7233 transitions. [2022-11-18 20:33:34,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:33:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 7233 transitions. [2022-11-18 20:33:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:33:34,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:34,623 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:34,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:34,825 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash -979765762, now seen corresponding path program 18 times [2022-11-18 20:33:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:34,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747239826] [2022-11-18 20:33:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:34,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:33:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:36,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:33:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:33:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:33:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747239826] [2022-11-18 20:33:36,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747239826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749958671] [2022-11-18 20:33:36,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:33:36,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:36,835 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:36,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:33:37,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 20:33:37,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 20:33:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:37,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-11-18 20:33:37,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:37,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:33:37,714 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 20:33:37,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-18 20:33:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:37,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:33:37,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-18 20:33:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:33:37,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:33:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 20:33:38,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:39,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749958671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:39,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:33:39,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 36 [2022-11-18 20:33:39,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976181692] [2022-11-18 20:33:39,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:39,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:33:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:33:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:33:39,378 INFO L87 Difference]: Start difference. First operand 4106 states and 7233 transitions. Second operand has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:33:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:44,226 INFO L93 Difference]: Finished difference Result 6450 states and 10810 transitions. [2022-11-18 20:33:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:33:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2022-11-18 20:33:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:44,256 INFO L225 Difference]: With dead ends: 6450 [2022-11-18 20:33:44,256 INFO L226 Difference]: Without dead ends: 5774 [2022-11-18 20:33:44,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=538, Invalid=4718, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 20:33:44,273 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 93 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:44,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 592 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 581 Invalid, 0 Unknown, 420 Unchecked, 0.7s Time] [2022-11-18 20:33:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2022-11-18 20:33:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 5014. [2022-11-18 20:33:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5014 states, 4494 states have (on average 1.3242100578549176) internal successors, (5951), 4740 states have internal predecessors, (5951), 200 states have call successors, (200), 66 states have call predecessors, (200), 319 states have return successors, (2126), 207 states have call predecessors, (2126), 200 states have call successors, (2126) [2022-11-18 20:33:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5014 states to 5014 states and 8277 transitions. [2022-11-18 20:33:46,295 INFO L78 Accepts]: Start accepts. Automaton has 5014 states and 8277 transitions. Word has length 59 [2022-11-18 20:33:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:46,296 INFO L495 AbstractCegarLoop]: Abstraction has 5014 states and 8277 transitions. [2022-11-18 20:33:46,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:33:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5014 states and 8277 transitions. [2022-11-18 20:33:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:33:46,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:46,317 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:46,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:33:46,523 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1652952510, now seen corresponding path program 19 times [2022-11-18 20:33:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811637687] [2022-11-18 20:33:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:46,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:47,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:33:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:33:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:33:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:33:47,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811637687] [2022-11-18 20:33:47,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811637687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266650057] [2022-11-18 20:33:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:33:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:47,503 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:47,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:33:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:33:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:33:48,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:33:48,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266650057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:48,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:48,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-11-18 20:33:48,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128303172] [2022-11-18 20:33:48,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:33:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:33:48,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:33:48,809 INFO L87 Difference]: Start difference. First operand 5014 states and 8277 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:33:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:51,410 INFO L93 Difference]: Finished difference Result 7141 states and 13190 transitions. [2022-11-18 20:33:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:33:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-11-18 20:33:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:51,465 INFO L225 Difference]: With dead ends: 7141 [2022-11-18 20:33:51,465 INFO L226 Difference]: Without dead ends: 7137 [2022-11-18 20:33:51,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:33:51,478 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 43 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:51,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 606 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:33:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7137 states. [2022-11-18 20:33:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7137 to 5665. [2022-11-18 20:33:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5665 states, 5110 states have (on average 1.3475538160469667) internal successors, (6886), 5373 states have internal predecessors, (6886), 215 states have call successors, (215), 66 states have call predecessors, (215), 339 states have return successors, (2373), 225 states have call predecessors, (2373), 215 states have call successors, (2373) [2022-11-18 20:33:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5665 states to 5665 states and 9474 transitions. [2022-11-18 20:33:54,218 INFO L78 Accepts]: Start accepts. Automaton has 5665 states and 9474 transitions. Word has length 59 [2022-11-18 20:33:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:54,219 INFO L495 AbstractCegarLoop]: Abstraction has 5665 states and 9474 transitions. [2022-11-18 20:33:54,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:33:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5665 states and 9474 transitions. [2022-11-18 20:33:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:33:54,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:54,246 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:54,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:54,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:33:54,452 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:54,453 INFO L85 PathProgramCache]: Analyzing trace with hash -794442876, now seen corresponding path program 2 times [2022-11-18 20:33:54,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:54,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656327772] [2022-11-18 20:33:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:54,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:33:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:55,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:33:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:55,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:33:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:33:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656327772] [2022-11-18 20:33:55,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656327772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659667041] [2022-11-18 20:33:55,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:33:55,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:55,437 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:55,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:33:55,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:33:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:33:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:33:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:33:56,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:33:56,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659667041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:33:56,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:33:56,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-11-18 20:33:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472246322] [2022-11-18 20:33:56,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:33:56,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:33:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:33:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:33:56,803 INFO L87 Difference]: Start difference. First operand 5665 states and 9474 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:33:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:59,744 INFO L93 Difference]: Finished difference Result 7034 states and 12519 transitions. [2022-11-18 20:33:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:33:59,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-11-18 20:33:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:59,801 INFO L225 Difference]: With dead ends: 7034 [2022-11-18 20:33:59,802 INFO L226 Difference]: Without dead ends: 7030 [2022-11-18 20:33:59,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 112 SyntacticMatches, 13 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:33:59,817 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 44 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:59,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 734 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:33:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2022-11-18 20:34:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 5904. [2022-11-18 20:34:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5904 states, 5332 states have (on average 1.355026256564141) internal successors, (7225), 5607 states have internal predecessors, (7225), 221 states have call successors, (221), 66 states have call predecessors, (221), 350 states have return successors, (2513), 230 states have call predecessors, (2513), 221 states have call successors, (2513) [2022-11-18 20:34:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5904 states to 5904 states and 9959 transitions. [2022-11-18 20:34:02,466 INFO L78 Accepts]: Start accepts. Automaton has 5904 states and 9959 transitions. Word has length 59 [2022-11-18 20:34:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:02,467 INFO L495 AbstractCegarLoop]: Abstraction has 5904 states and 9959 transitions. [2022-11-18 20:34:02,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:34:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5904 states and 9959 transitions. [2022-11-18 20:34:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 20:34:02,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:02,495 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:02,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-18 20:34:02,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:34:02,701 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:02,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1271428322, now seen corresponding path program 20 times [2022-11-18 20:34:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:02,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019604917] [2022-11-18 20:34:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:34:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:02,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:34:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:34:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:34:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:02,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019604917] [2022-11-18 20:34:02,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019604917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:02,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097385695] [2022-11-18 20:34:02,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:34:02,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:02,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:02,927 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:02,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:34:03,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:34:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:34:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 46 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:34:03,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:34:03,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097385695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:03,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:03,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-11-18 20:34:03,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026879995] [2022-11-18 20:34:03,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:03,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:34:03,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:34:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:34:03,452 INFO L87 Difference]: Start difference. First operand 5904 states and 9959 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:34:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:05,738 INFO L93 Difference]: Finished difference Result 6581 states and 10860 transitions. [2022-11-18 20:34:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:34:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2022-11-18 20:34:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:05,772 INFO L225 Difference]: With dead ends: 6581 [2022-11-18 20:34:05,772 INFO L226 Difference]: Without dead ends: 5655 [2022-11-18 20:34:05,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:34:05,784 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:05,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 119 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2022-11-18 20:34:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5391. [2022-11-18 20:34:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5391 states, 4866 states have (on average 1.3464858199753391) internal successors, (6552), 5114 states have internal predecessors, (6552), 205 states have call successors, (205), 60 states have call predecessors, (205), 319 states have return successors, (2280), 216 states have call predecessors, (2280), 205 states have call successors, (2280) [2022-11-18 20:34:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5391 states to 5391 states and 9037 transitions. [2022-11-18 20:34:07,956 INFO L78 Accepts]: Start accepts. Automaton has 5391 states and 9037 transitions. Word has length 61 [2022-11-18 20:34:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:07,957 INFO L495 AbstractCegarLoop]: Abstraction has 5391 states and 9037 transitions. [2022-11-18 20:34:07,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:34:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5391 states and 9037 transitions. [2022-11-18 20:34:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 20:34:07,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:07,983 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:07,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:08,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:34:08,189 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1246342810, now seen corresponding path program 5 times [2022-11-18 20:34:08,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:08,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324948415] [2022-11-18 20:34:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:08,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:34:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:08,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:34:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:34:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 59 proven. 106 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:34:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:08,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324948415] [2022-11-18 20:34:08,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324948415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:08,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858891574] [2022-11-18 20:34:08,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:34:08,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:08,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:08,495 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:08,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:34:08,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:34:08,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:34:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 84 proven. 80 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:34:08,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 69 proven. 96 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:34:09,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858891574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:09,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:09,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 20 [2022-11-18 20:34:09,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119030251] [2022-11-18 20:34:09,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:09,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:34:09,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:34:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:34:09,354 INFO L87 Difference]: Start difference. First operand 5391 states and 9037 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:34:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:11,447 INFO L93 Difference]: Finished difference Result 5732 states and 9480 transitions. [2022-11-18 20:34:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:34:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-18 20:34:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:11,475 INFO L225 Difference]: With dead ends: 5732 [2022-11-18 20:34:11,475 INFO L226 Difference]: Without dead ends: 4034 [2022-11-18 20:34:11,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 126 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:34:11,488 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:11,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 266 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2022-11-18 20:34:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 3906. [2022-11-18 20:34:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3532 states have (on average 1.3839184597961496) internal successors, (4888), 3710 states have internal predecessors, (4888), 149 states have call successors, (149), 32 states have call predecessors, (149), 224 states have return successors, (1846), 163 states have call predecessors, (1846), 149 states have call successors, (1846) [2022-11-18 20:34:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 6883 transitions. [2022-11-18 20:34:13,112 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 6883 transitions. Word has length 62 [2022-11-18 20:34:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:13,112 INFO L495 AbstractCegarLoop]: Abstraction has 3906 states and 6883 transitions. [2022-11-18 20:34:13,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:34:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 6883 transitions. [2022-11-18 20:34:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 20:34:13,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:13,130 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:13,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:13,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:13,330 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash 355115088, now seen corresponding path program 6 times [2022-11-18 20:34:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:13,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857019038] [2022-11-18 20:34:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:13,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:13,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:34:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:13,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:34:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-18 20:34:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:34:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857019038] [2022-11-18 20:34:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857019038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782149265] [2022-11-18 20:34:13,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:34:13,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:13,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:13,565 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:34:14,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 20:34:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:34:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 144 proven. 4 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-18 20:34:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 142 proven. 4 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:34:14,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782149265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:14,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:14,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 22 [2022-11-18 20:34:14,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553640870] [2022-11-18 20:34:14,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:14,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:34:14,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:14,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:34:14,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:34:14,521 INFO L87 Difference]: Start difference. First operand 3906 states and 6883 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:34:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:15,922 INFO L93 Difference]: Finished difference Result 4432 states and 7592 transitions. [2022-11-18 20:34:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:34:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2022-11-18 20:34:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:15,937 INFO L225 Difference]: With dead ends: 4432 [2022-11-18 20:34:15,937 INFO L226 Difference]: Without dead ends: 3422 [2022-11-18 20:34:15,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:34:15,949 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 242 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-11-18 20:34:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1893. [2022-11-18 20:34:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1729 states have (on average 1.423366107576634) internal successors, (2461), 1820 states have internal predecessors, (2461), 53 states have call successors, (53), 19 states have call predecessors, (53), 110 states have return successors, (494), 53 states have call predecessors, (494), 53 states have call successors, (494) [2022-11-18 20:34:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3008 transitions. [2022-11-18 20:34:16,828 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3008 transitions. Word has length 68 [2022-11-18 20:34:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:16,828 INFO L495 AbstractCegarLoop]: Abstraction has 1893 states and 3008 transitions. [2022-11-18 20:34:16,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:34:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3008 transitions. [2022-11-18 20:34:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:34:16,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:16,833 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:16,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:17,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:17,034 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1254578670, now seen corresponding path program 7 times [2022-11-18 20:34:17,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:17,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023151491] [2022-11-18 20:34:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:17,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:34:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:34:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:17,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:34:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:34:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023151491] [2022-11-18 20:34:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023151491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099948636] [2022-11-18 20:34:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:34:18,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:18,063 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:18,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:34:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:34:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:34:18,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:34:19,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099948636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:19,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:19,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 21 [2022-11-18 20:34:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454225934] [2022-11-18 20:34:19,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:19,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:34:19,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:34:19,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:34:19,406 INFO L87 Difference]: Start difference. First operand 1893 states and 3008 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:34:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:20,577 INFO L93 Difference]: Finished difference Result 2375 states and 4041 transitions. [2022-11-18 20:34:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:34:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 70 [2022-11-18 20:34:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:20,586 INFO L225 Difference]: With dead ends: 2375 [2022-11-18 20:34:20,586 INFO L226 Difference]: Without dead ends: 2371 [2022-11-18 20:34:20,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:34:20,588 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 31 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:20,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1002 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:34:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2022-11-18 20:34:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2088. [2022-11-18 20:34:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1910 states have (on average 1.4350785340314136) internal successors, (2741), 2011 states have internal predecessors, (2741), 57 states have call successors, (57), 19 states have call predecessors, (57), 120 states have return successors, (575), 57 states have call predecessors, (575), 57 states have call successors, (575) [2022-11-18 20:34:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3373 transitions. [2022-11-18 20:34:21,363 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3373 transitions. Word has length 70 [2022-11-18 20:34:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:21,364 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 3373 transitions. [2022-11-18 20:34:21,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:34:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3373 transitions. [2022-11-18 20:34:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:34:21,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:21,370 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:21,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:21,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:34:21,570 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1934637040, now seen corresponding path program 21 times [2022-11-18 20:34:21,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:21,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441067119] [2022-11-18 20:34:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:21,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:34:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:22,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:34:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:22,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:34:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 120 proven. 103 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 20:34:22,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441067119] [2022-11-18 20:34:22,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441067119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349021667] [2022-11-18 20:34:22,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:34:22,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:22,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:22,943 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:22,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:34:23,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:34:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:23,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:34:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:34:23,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:34:23,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:34:23,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-18 20:34:23,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:34:23,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-18 20:34:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 206 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-18 20:34:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:24,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349021667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:24,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:24,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-11-18 20:34:24,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884315720] [2022-11-18 20:34:24,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:24,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:34:24,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:34:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:34:24,850 INFO L87 Difference]: Start difference. First operand 2088 states and 3373 transitions. Second operand has 33 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:34:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:30,647 INFO L93 Difference]: Finished difference Result 3759 states and 6376 transitions. [2022-11-18 20:34:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:34:30,648 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 70 [2022-11-18 20:34:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:30,659 INFO L225 Difference]: With dead ends: 3759 [2022-11-18 20:34:30,659 INFO L226 Difference]: Without dead ends: 3737 [2022-11-18 20:34:30,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=644, Invalid=9058, Unknown=0, NotChecked=0, Total=9702 [2022-11-18 20:34:30,664 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:30,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 634 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 647 Unchecked, 0.3s Time] [2022-11-18 20:34:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2022-11-18 20:34:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 2826. [2022-11-18 20:34:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2594 states have (on average 1.4433307632999228) internal successors, (3744), 2735 states have internal predecessors, (3744), 68 states have call successors, (68), 22 states have call predecessors, (68), 163 states have return successors, (817), 68 states have call predecessors, (817), 68 states have call successors, (817) [2022-11-18 20:34:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 4629 transitions. [2022-11-18 20:34:31,733 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 4629 transitions. Word has length 70 [2022-11-18 20:34:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:31,733 INFO L495 AbstractCegarLoop]: Abstraction has 2826 states and 4629 transitions. [2022-11-18 20:34:31,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:34:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 4629 transitions. [2022-11-18 20:34:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:34:31,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:31,740 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:31,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:31,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:31,941 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1512744108, now seen corresponding path program 22 times [2022-11-18 20:34:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:31,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606573438] [2022-11-18 20:34:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:33,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:34:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:33,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:34:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:34:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 81 proven. 152 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:34:34,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606573438] [2022-11-18 20:34:34,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606573438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:34,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696696493] [2022-11-18 20:34:34,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:34:34,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:34,012 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:34,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:34:34,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:34:34,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 20:34:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:34,954 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 20:34:34,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-11-18 20:34:35,131 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 20:34:35,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2022-11-18 20:34:35,292 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-18 20:34:35,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-11-18 20:34:35,620 INFO L321 Elim1Store]: treesize reduction 125, result has 10.7 percent of original size [2022-11-18 20:34:35,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 35 [2022-11-18 20:34:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 33 proven. 223 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:34:46,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:20,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2022-11-18 20:35:20,269 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-18 20:35:20,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1316 treesize of output 1263 [2022-11-18 20:35:21,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:21,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 80 [2022-11-18 20:35:21,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-18 20:35:21,317 INFO L321 Elim1Store]: treesize reduction 10, result has 76.2 percent of original size [2022-11-18 20:35:21,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10562 treesize of output 10075 [2022-11-18 20:35:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 13 proven. 240 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:35:42,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696696493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:42,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:42,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30, 29] total 74 [2022-11-18 20:35:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544238591] [2022-11-18 20:35:42,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-18 20:35:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-18 20:35:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=4980, Unknown=19, NotChecked=0, Total=5402 [2022-11-18 20:35:42,811 INFO L87 Difference]: Start difference. First operand 2826 states and 4629 transitions. Second operand has 74 states, 70 states have (on average 2.257142857142857) internal successors, (158), 73 states have internal predecessors, (158), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-18 20:38:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:41,781 INFO L93 Difference]: Finished difference Result 10988 states and 20634 transitions. [2022-11-18 20:38:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-18 20:38:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 2.257142857142857) internal successors, (158), 73 states have internal predecessors, (158), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 70 [2022-11-18 20:38:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:41,825 INFO L225 Difference]: With dead ends: 10988 [2022-11-18 20:38:41,825 INFO L226 Difference]: Without dead ends: 8533 [2022-11-18 20:38:41,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 135 SyntacticMatches, 16 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15261 ImplicationChecksByTransitivity, 221.2s TimeCoverageRelationStatistics Valid=3533, Invalid=34992, Unknown=87, NotChecked=0, Total=38612 [2022-11-18 20:38:41,844 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 608 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 5622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2307 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:41,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 2081 Invalid, 5622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3109 Invalid, 0 Unknown, 2307 Unchecked, 3.2s Time] [2022-11-18 20:38:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2022-11-18 20:38:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 5626. [2022-11-18 20:38:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5113 states have (on average 1.4156072755720712) internal successors, (7238), 5428 states have internal predecessors, (7238), 148 states have call successors, (148), 44 states have call predecessors, (148), 364 states have return successors, (2597), 153 states have call predecessors, (2597), 148 states have call successors, (2597) [2022-11-18 20:38:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 9983 transitions. [2022-11-18 20:38:44,847 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 9983 transitions. Word has length 70 [2022-11-18 20:38:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:44,847 INFO L495 AbstractCegarLoop]: Abstraction has 5626 states and 9983 transitions. [2022-11-18 20:38:44,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 2.257142857142857) internal successors, (158), 73 states have internal predecessors, (158), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-18 20:38:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 9983 transitions. [2022-11-18 20:38:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:38:44,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:44,866 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:44,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:45,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:45,067 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash -25285008, now seen corresponding path program 23 times [2022-11-18 20:38:45,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:45,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775545504] [2022-11-18 20:38:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:45,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:45,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:38:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:46,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:38:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:46,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:38:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 66 proven. 166 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 20:38:46,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775545504] [2022-11-18 20:38:46,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775545504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430353961] [2022-11-18 20:38:46,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:38:46,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:46,585 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:46,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:38:46,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:38:46,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:46,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:38:46,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:47,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:38:47,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:38:47,442 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 20:38:47,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-18 20:38:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:47,604 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 20:38:47,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2022-11-18 20:38:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:47,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-18 20:38:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 47 proven. 202 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:38:48,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:53,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-11-18 20:38:53,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 144 [2022-11-18 20:38:53,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:53,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2022-11-18 20:38:53,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-18 20:38:53,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:53,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 86 [2022-11-18 20:38:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 27 proven. 219 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:38:54,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430353961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:54,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:54,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 24] total 66 [2022-11-18 20:38:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688732296] [2022-11-18 20:38:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 20:38:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 20:38:54,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3904, Unknown=4, NotChecked=0, Total=4290 [2022-11-18 20:38:54,235 INFO L87 Difference]: Start difference. First operand 5626 states and 9983 transitions. Second operand has 66 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:39:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:06,055 INFO L93 Difference]: Finished difference Result 7951 states and 14462 transitions. [2022-11-18 20:39:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-18 20:39:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 70 [2022-11-18 20:39:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:06,079 INFO L225 Difference]: With dead ends: 7951 [2022-11-18 20:39:06,079 INFO L226 Difference]: Without dead ends: 6811 [2022-11-18 20:39:06,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7309 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=2004, Invalid=17452, Unknown=4, NotChecked=0, Total=19460 [2022-11-18 20:39:06,087 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 277 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1341 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:06,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 538 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1404 Invalid, 0 Unknown, 1341 Unchecked, 1.3s Time] [2022-11-18 20:39:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2022-11-18 20:39:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 6025. [2022-11-18 20:39:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 5478 states have (on average 1.4006936838262138) internal successors, (7673), 5797 states have internal predecessors, (7673), 164 states have call successors, (164), 54 states have call predecessors, (164), 382 states have return successors, (2773), 173 states have call predecessors, (2773), 164 states have call successors, (2773) [2022-11-18 20:39:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 10610 transitions. [2022-11-18 20:39:08,575 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 10610 transitions. Word has length 70 [2022-11-18 20:39:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:08,575 INFO L495 AbstractCegarLoop]: Abstraction has 6025 states and 10610 transitions. [2022-11-18 20:39:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 7 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:39:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 10610 transitions. [2022-11-18 20:39:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:39:08,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:08,593 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:08,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:08,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:39:08,794 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -739566036, now seen corresponding path program 24 times [2022-11-18 20:39:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185672110] [2022-11-18 20:39:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:09,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:39:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:09,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:39:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:10,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:39:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 231 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:39:10,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185672110] [2022-11-18 20:39:10,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185672110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163893305] [2022-11-18 20:39:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:39:10,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:10,437 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:10,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:39:10,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 20:39:10,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 20:39:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:11,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-18 20:39:11,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 31 [2022-11-18 20:39:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:11,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:11,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2022-11-18 20:39:11,627 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-18 20:39:11,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-11-18 20:39:11,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:11,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-18 20:39:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 16 proven. 215 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:39:12,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:13,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163893305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:13,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:39:13,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 50 [2022-11-18 20:39:13,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295249739] [2022-11-18 20:39:13,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:13,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:39:13,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:13,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:39:13,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=3385, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:39:13,408 INFO L87 Difference]: Start difference. First operand 6025 states and 10610 transitions. Second operand has 50 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:39:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:21,815 INFO L93 Difference]: Finished difference Result 8022 states and 14321 transitions. [2022-11-18 20:39:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-18 20:39:21,816 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 70 [2022-11-18 20:39:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:21,842 INFO L225 Difference]: With dead ends: 8022 [2022-11-18 20:39:21,842 INFO L226 Difference]: Without dead ends: 7668 [2022-11-18 20:39:21,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6316 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1367, Invalid=14383, Unknown=0, NotChecked=0, Total=15750 [2022-11-18 20:39:21,850 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 239 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:21,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 599 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 699 Invalid, 0 Unknown, 654 Unchecked, 0.7s Time] [2022-11-18 20:39:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2022-11-18 20:39:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 7349. [2022-11-18 20:39:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 6689 states have (on average 1.398415308715802) internal successors, (9354), 7088 states have internal predecessors, (9354), 203 states have call successors, (203), 70 states have call predecessors, (203), 456 states have return successors, (3420), 190 states have call predecessors, (3420), 203 states have call successors, (3420) [2022-11-18 20:39:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 12977 transitions. [2022-11-18 20:39:24,958 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 12977 transitions. Word has length 70 [2022-11-18 20:39:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:24,958 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 12977 transitions. [2022-11-18 20:39:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.25531914893617) internal successors, (106), 48 states have internal predecessors, (106), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:39:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 12977 transitions. [2022-11-18 20:39:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:39:24,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:24,982 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:24,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:39:25,199 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash -590788496, now seen corresponding path program 25 times [2022-11-18 20:39:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194020176] [2022-11-18 20:39:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:25,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:39:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:25,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:39:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:39:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 12 proven. 212 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:39:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194020176] [2022-11-18 20:39:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194020176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785437229] [2022-11-18 20:39:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:39:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:26,302 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:26,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 20:39:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:39:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:26,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-18 20:39:27,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:27,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:39:27,047 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 20:39:27,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-18 20:39:27,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:27,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2022-11-18 20:39:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:27,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:39:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 47 proven. 202 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:39:27,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:28,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-18 20:39:28,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-11-18 20:39:29,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:29,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2022-11-18 20:39:29,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-18 20:39:29,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:29,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2022-11-18 20:39:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 26 proven. 220 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:39:29,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785437229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:29,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:29,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 24] total 62 [2022-11-18 20:39:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774602215] [2022-11-18 20:39:29,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 20:39:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 20:39:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3458, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:39:29,642 INFO L87 Difference]: Start difference. First operand 7349 states and 12977 transitions. Second operand has 62 states, 59 states have (on average 2.5762711864406778) internal successors, (152), 59 states have internal predecessors, (152), 8 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:39:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:41,527 INFO L93 Difference]: Finished difference Result 13807 states and 24693 transitions. [2022-11-18 20:39:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:39:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 2.5762711864406778) internal successors, (152), 59 states have internal predecessors, (152), 8 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 70 [2022-11-18 20:39:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:41,568 INFO L225 Difference]: With dead ends: 13807 [2022-11-18 20:39:41,568 INFO L226 Difference]: Without dead ends: 10794 [2022-11-18 20:39:41,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5579 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1552, Invalid=15218, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 20:39:41,583 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 205 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:41,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1160 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1268 Invalid, 0 Unknown, 1303 Unchecked, 1.3s Time] [2022-11-18 20:39:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2022-11-18 20:39:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 9313. [2022-11-18 20:39:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9313 states, 8520 states have (on average 1.3821596244131455) internal successors, (11776), 8970 states have internal predecessors, (11776), 263 states have call successors, (263), 91 states have call predecessors, (263), 529 states have return successors, (4673), 251 states have call predecessors, (4673), 263 states have call successors, (4673) [2022-11-18 20:39:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9313 states to 9313 states and 16712 transitions. [2022-11-18 20:39:46,043 INFO L78 Accepts]: Start accepts. Automaton has 9313 states and 16712 transitions. Word has length 70 [2022-11-18 20:39:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:46,044 INFO L495 AbstractCegarLoop]: Abstraction has 9313 states and 16712 transitions. [2022-11-18 20:39:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 2.5762711864406778) internal successors, (152), 59 states have internal predecessors, (152), 8 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:39:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9313 states and 16712 transitions. [2022-11-18 20:39:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:39:46,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:46,074 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:46,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:46,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 20:39:46,280 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1502725164, now seen corresponding path program 26 times [2022-11-18 20:39:46,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:46,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845815468] [2022-11-18 20:39:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:46,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:39:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:39:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:47,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:39:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 5 proven. 217 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:39:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:47,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845815468] [2022-11-18 20:39:47,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845815468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:47,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356323240] [2022-11-18 20:39:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:39:47,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:47,063 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:47,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 20:39:47,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:39:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 20:39:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:47,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-18 20:39:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:39:47,559 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 20:39:47,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-18 20:39:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:39:47,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:47,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2022-11-18 20:39:47,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:47,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-18 20:39:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:39:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:39:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 60 proven. 153 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:39:48,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:49,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356323240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:49,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:39:49,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2022-11-18 20:39:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632470349] [2022-11-18 20:39:49,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:39:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:39:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:39:49,205 INFO L87 Difference]: Start difference. First operand 9313 states and 16712 transitions. Second operand has 35 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:39:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:55,549 INFO L93 Difference]: Finished difference Result 11003 states and 19804 transitions. [2022-11-18 20:39:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 20:39:55,550 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 70 [2022-11-18 20:39:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:55,586 INFO L225 Difference]: With dead ends: 11003 [2022-11-18 20:39:55,586 INFO L226 Difference]: Without dead ends: 8595 [2022-11-18 20:39:55,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=734, Invalid=5586, Unknown=0, NotChecked=0, Total=6320 [2022-11-18 20:39:55,598 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 128 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:55,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 589 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 883 Invalid, 0 Unknown, 464 Unchecked, 0.8s Time] [2022-11-18 20:39:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2022-11-18 20:40:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 8551. [2022-11-18 20:40:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8551 states, 7798 states have (on average 1.3826622210823287) internal successors, (10782), 8221 states have internal predecessors, (10782), 269 states have call successors, (269), 95 states have call predecessors, (269), 483 states have return successors, (4354), 234 states have call predecessors, (4354), 269 states have call successors, (4354) [2022-11-18 20:40:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8551 states to 8551 states and 15405 transitions. [2022-11-18 20:40:00,511 INFO L78 Accepts]: Start accepts. Automaton has 8551 states and 15405 transitions. Word has length 70 [2022-11-18 20:40:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:00,511 INFO L495 AbstractCegarLoop]: Abstraction has 8551 states and 15405 transitions. [2022-11-18 20:40:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:40:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 8551 states and 15405 transitions. [2022-11-18 20:40:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:40:00,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:00,576 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:00,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:00,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:00,777 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:40:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1653603216, now seen corresponding path program 27 times [2022-11-18 20:40:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527505242] [2022-11-18 20:40:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:40:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:01,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 20:40:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:01,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:40:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 27 proven. 197 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:40:01,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527505242] [2022-11-18 20:40:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527505242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040577573] [2022-11-18 20:40:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:40:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:01,730 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d51184a-796f-45d5-9026-22948dfac8e9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 20:40:01,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 20:40:01,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:40:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 20:40:02,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2022-11-18 20:40:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 20:40:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:40:02,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-18 20:40:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:02,913 INFO L321 Elim1Store]: treesize reduction 92, result has 32.4 percent of original size [2022-11-18 20:40:02,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 76 [2022-11-18 20:40:05,288 INFO L321 Elim1Store]: treesize reduction 384, result has 45.5 percent of original size [2022-11-18 20:40:05,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 221 treesize of output 430