./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg --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 e210f4af0021f1e0c887bbfa24b18aad98424108efaad4cfc57802fd9fd5ce53 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:04:41,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:04:41,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:04:41,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:04:41,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:04:41,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:04:41,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:04:41,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:04:41,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:04:41,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:04:41,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:04:41,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:04:41,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:04:41,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:04:41,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:04:41,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:04:41,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:04:41,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:04:41,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:04:41,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:04:41,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:04:41,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:04:41,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:04:41,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:04:41,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:04:41,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:04:41,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:04:41,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:04:41,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:04:41,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:04:41,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:04:41,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:04:41,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:04:41,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:04:41,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:04:41,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:04:41,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:04:41,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:04:41,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:04:41,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:04:41,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:04:41,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:04:41,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:04:41,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:04:41,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:04:41,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:04:41,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:04:41,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:04:41,405 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:04:41,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:04:41,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:04:41,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:04:41,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:04:41,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:04:41,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:04:41,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:04:41,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:04:41,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:04:41,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:04:41,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:04:41,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:04:41,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:04:41,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:04:41,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:04:41,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:04:41,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:04:41,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:04:41,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:04:41,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:04:41,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:04:41,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:04:41,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:04:41,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:04:41,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:04:41,411 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_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e210f4af0021f1e0c887bbfa24b18aad98424108efaad4cfc57802fd9fd5ce53 [2021-10-28 09:04:41,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:04:41,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:04:41,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:04:41,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:04:41,680 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:04:41,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-lit/gj2007.i [2021-10-28 09:04:41,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/data/495fc37d3/0f068ea30a574431850fd8cfd663b6af/FLAG0d13e53b5 [2021-10-28 09:04:42,143 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:04:42,143 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/sv-benchmarks/c/loop-lit/gj2007.i [2021-10-28 09:04:42,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/data/495fc37d3/0f068ea30a574431850fd8cfd663b6af/FLAG0d13e53b5 [2021-10-28 09:04:42,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/data/495fc37d3/0f068ea30a574431850fd8cfd663b6af [2021-10-28 09:04:42,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:04:42,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:04:42,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:04:42,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:04:42,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:04:42,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e360500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42, skipping insertion in model container [2021-10-28 09:04:42,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:04:42,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:04:42,371 WARN L228 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_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/sv-benchmarks/c/loop-lit/gj2007.i[895,908] [2021-10-28 09:04:42,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:04:42,396 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:04:42,409 WARN L228 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_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/sv-benchmarks/c/loop-lit/gj2007.i[895,908] [2021-10-28 09:04:42,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:04:42,425 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:04:42,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42 WrapperNode [2021-10-28 09:04:42,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:04:42,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:04:42,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:04:42,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:04:42,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:04:42,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:04:42,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:04:42,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:04:42,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:04:42,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:04:42,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:04:42,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:04:42,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (1/1) ... [2021-10-28 09:04:42,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:04:42,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:42,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:04:42,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:04:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:04:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:04:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:04:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:04:42,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:04:42,769 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 09:04:42,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:04:42 BoogieIcfgContainer [2021-10-28 09:04:42,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:04:42,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:04:42,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:04:42,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:04:42,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:04:42" (1/3) ... [2021-10-28 09:04:42,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e80270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:04:42, skipping insertion in model container [2021-10-28 09:04:42,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:04:42" (2/3) ... [2021-10-28 09:04:42,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e80270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:04:42, skipping insertion in model container [2021-10-28 09:04:42,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:04:42" (3/3) ... [2021-10-28 09:04:42,781 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2021-10-28 09:04:42,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:04:42,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:04:42,857 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:04:42,864 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:04:42,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:04:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 09:04:42,883 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:42,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:04:42,884 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-10-28 09:04:42,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:42,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108321518] [2021-10-28 09:04:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:42,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:43,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:43,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108321518] [2021-10-28 09:04:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108321518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:04:43,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:04:43,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:04:43,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149535200] [2021-10-28 09:04:43,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:04:43,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:04:43,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:04:43,097 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:43,111 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-28 09:04:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:04:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-28 09:04:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:43,129 INFO L225 Difference]: With dead ends: 20 [2021-10-28 09:04:43,129 INFO L226 Difference]: Without dead ends: 8 [2021-10-28 09:04:43,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:04:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-28 09:04:43,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-28 09:04:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-28 09:04:43,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-28 09:04:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:43,172 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-28 09:04:43,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-28 09:04:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 09:04:43,182 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:43,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:04:43,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:04:43,183 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-10-28 09:04:43,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:43,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034797520] [2021-10-28 09:04:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:43,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:43,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:43,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034797520] [2021-10-28 09:04:43,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034797520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:04:43,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:04:43,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:04:43,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873927814] [2021-10-28 09:04:43,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:04:43,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:43,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:04:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:04:43,283 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:43,299 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-10-28 09:04:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:04:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-28 09:04:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:43,301 INFO L225 Difference]: With dead ends: 16 [2021-10-28 09:04:43,301 INFO L226 Difference]: Without dead ends: 10 [2021-10-28 09:04:43,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:04:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-28 09:04:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-28 09:04:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-28 09:04:43,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-10-28 09:04:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:43,306 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-28 09:04:43,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-28 09:04:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:04:43,307 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:43,308 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:43,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:04:43,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-10-28 09:04:43,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:43,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116165218] [2021-10-28 09:04:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:43,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:43,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:43,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116165218] [2021-10-28 09:04:43,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116165218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:43,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936502439] [2021-10-28 09:04:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:43,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:43,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:43,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:04:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:43,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:04:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:43,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936502439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:43,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:43,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 09:04:43,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5341880] [2021-10-28 09:04:43,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:04:43,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:04:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:04:43,608 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:43,632 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-10-28 09:04:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:04:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 09:04:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:43,634 INFO L225 Difference]: With dead ends: 18 [2021-10-28 09:04:43,634 INFO L226 Difference]: Without dead ends: 12 [2021-10-28 09:04:43,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:04:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-28 09:04:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-28 09:04:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-28 09:04:43,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-10-28 09:04:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:43,639 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-28 09:04:43,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-28 09:04:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:04:43,640 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:43,640 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:43,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:43,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:43,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-10-28 09:04:43,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:43,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031886692] [2021-10-28 09:04:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:43,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:04:43,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:43,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031886692] [2021-10-28 09:04:43,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031886692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:04:43,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:04:43,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:04:43,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055581752] [2021-10-28 09:04:43,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:04:43,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:43,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:04:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:04:43,913 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:43,936 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-28 09:04:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:04:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 09:04:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:43,938 INFO L225 Difference]: With dead ends: 18 [2021-10-28 09:04:43,938 INFO L226 Difference]: Without dead ends: 14 [2021-10-28 09:04:43,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:04:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-28 09:04:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-28 09:04:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-28 09:04:43,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-10-28 09:04:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:43,943 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-28 09:04:43,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-28 09:04:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:04:43,944 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:43,944 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:43,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:04:43,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-10-28 09:04:43,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:43,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019313403] [2021-10-28 09:04:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:43,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:44,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:44,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019313403] [2021-10-28 09:04:44,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019313403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:44,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201696703] [2021-10-28 09:04:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:44,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:44,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:04:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:04:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:44,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201696703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:44,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:44,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 09:04:44,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511436071] [2021-10-28 09:04:44,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:04:44,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:44,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:04:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:04:44,128 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:44,151 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-28 09:04:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:04:44,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 09:04:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:44,153 INFO L225 Difference]: With dead ends: 22 [2021-10-28 09:04:44,153 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 09:04:44,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:04:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 09:04:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 09:04:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 09:04:44,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-10-28 09:04:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:44,158 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 09:04:44,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-28 09:04:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:04:44,159 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:44,159 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:44,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:44,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:44,387 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2021-10-28 09:04:44,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:44,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310942006] [2021-10-28 09:04:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:44,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:44,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:44,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310942006] [2021-10-28 09:04:44,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310942006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:44,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687646255] [2021-10-28 09:04:44,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:04:44,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:44,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:44,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:04:44,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:04:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:04:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:44,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687646255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:44,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:04:44,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248726039] [2021-10-28 09:04:44,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:04:44,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:04:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:04:44,649 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:44,676 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-28 09:04:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:04:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 09:04:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:44,677 INFO L225 Difference]: With dead ends: 24 [2021-10-28 09:04:44,677 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 09:04:44,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:04:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 09:04:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 09:04:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-28 09:04:44,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-10-28 09:04:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:44,683 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-28 09:04:44,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-28 09:04:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:04:44,684 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:44,685 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:44,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:44,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:04:44,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 3 times [2021-10-28 09:04:44,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:44,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768897265] [2021-10-28 09:04:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:44,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:44,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:44,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768897265] [2021-10-28 09:04:44,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768897265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:44,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520987874] [2021-10-28 09:04:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:04:44,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:44,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:44,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:44,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:04:45,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:04:45,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:04:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:04:45,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520987874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:45,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:45,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-10-28 09:04:45,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302970060] [2021-10-28 09:04:45,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:04:45,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:45,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:04:45,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:04:45,145 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:45,212 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-10-28 09:04:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:04:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 09:04:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:45,218 INFO L225 Difference]: With dead ends: 29 [2021-10-28 09:04:45,219 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 09:04:45,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:04:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 09:04:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-28 09:04:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-28 09:04:45,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-10-28 09:04:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:45,239 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-28 09:04:45,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-28 09:04:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:04:45,241 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:45,242 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:45,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:45,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:45,451 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 4 times [2021-10-28 09:04:45,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:45,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282555117] [2021-10-28 09:04:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:45,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:45,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:45,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282555117] [2021-10-28 09:04:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282555117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568000168] [2021-10-28 09:04:45,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:04:45,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:45,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:45,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:04:45,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:04:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:04:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:45,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568000168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:45,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:45,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:04:45,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2619039] [2021-10-28 09:04:45,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:04:45,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:45,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:04:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:04:45,744 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:45,798 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-10-28 09:04:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:04:45,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:04:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:45,801 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:04:45,802 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 09:04:45,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:04:45,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 09:04:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-28 09:04:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-28 09:04:45,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-10-28 09:04:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-28 09:04:45,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-28 09:04:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:04:45,811 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:45,811 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:45,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:46,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:04:46,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 5 times [2021-10-28 09:04:46,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:46,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752281846] [2021-10-28 09:04:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:46,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:46,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:46,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752281846] [2021-10-28 09:04:46,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752281846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:46,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437151929] [2021-10-28 09:04:46,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:04:46,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:46,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:46,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:04:46,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-28 09:04:46,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:46,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:04:46,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:46,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437151929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:46,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:46,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 09:04:46,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571209483] [2021-10-28 09:04:46,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:04:46,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:04:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:04:46,378 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:46,419 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-10-28 09:04:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:04:46,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 09:04:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:46,423 INFO L225 Difference]: With dead ends: 34 [2021-10-28 09:04:46,423 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 09:04:46,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:04:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 09:04:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-28 09:04:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-28 09:04:46,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-10-28 09:04:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:46,435 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-28 09:04:46,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-28 09:04:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:04:46,436 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:46,436 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:46,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:46,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:46,637 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 6 times [2021-10-28 09:04:46,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:46,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466747600] [2021-10-28 09:04:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:46,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:46,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:46,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466747600] [2021-10-28 09:04:46,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466747600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:46,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881528633] [2021-10-28 09:04:46,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:04:46,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:46,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:46,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:04:46,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-28 09:04:46,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:04:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881528633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:46,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:46,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-10-28 09:04:46,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652250138] [2021-10-28 09:04:46,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:04:46,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:04:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:04:46,951 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:46,997 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-28 09:04:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:04:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 09:04:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:46,998 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:04:46,998 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 09:04:46,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:04:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 09:04:47,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-28 09:04:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-10-28 09:04:47,003 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-10-28 09:04:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:47,003 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-10-28 09:04:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-10-28 09:04:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 09:04:47,005 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:47,005 INFO L513 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:47,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:47,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:04:47,223 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 7 times [2021-10-28 09:04:47,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:47,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511101704] [2021-10-28 09:04:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:47,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:47,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:47,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511101704] [2021-10-28 09:04:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511101704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:47,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696467109] [2021-10-28 09:04:47,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:04:47,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:47,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:47,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:47,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:04:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:04:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696467109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:47,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:47,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-28 09:04:47,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747925973] [2021-10-28 09:04:47,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:04:47,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:04:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:04:47,577 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:47,622 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-28 09:04:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:04:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-28 09:04:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:47,625 INFO L225 Difference]: With dead ends: 42 [2021-10-28 09:04:47,625 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 09:04:47,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:04:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 09:04:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 09:04:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-28 09:04:47,633 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-10-28 09:04:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:47,635 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-28 09:04:47,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-28 09:04:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:04:47,637 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:47,637 INFO L513 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:47,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 09:04:47,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 8 times [2021-10-28 09:04:47,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:47,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54198046] [2021-10-28 09:04:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:47,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:47,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:47,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54198046] [2021-10-28 09:04:47,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54198046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:47,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374092923] [2021-10-28 09:04:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:04:47,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:47,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:48,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:04:48,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:04:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:04:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:48,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374092923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:48,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:48,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-28 09:04:48,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274877687] [2021-10-28 09:04:48,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:04:48,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:04:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:04:48,218 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:48,268 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-10-28 09:04:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:04:48,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-28 09:04:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:48,271 INFO L225 Difference]: With dead ends: 44 [2021-10-28 09:04:48,272 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 09:04:48,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:04:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 09:04:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-28 09:04:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-28 09:04:48,287 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2021-10-28 09:04:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:48,288 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-28 09:04:48,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-28 09:04:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:04:48,293 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:48,294 INFO L513 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:48,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:48,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:48,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash 653864095, now seen corresponding path program 9 times [2021-10-28 09:04:48,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:48,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86543155] [2021-10-28 09:04:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:48,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:04:48,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:48,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86543155] [2021-10-28 09:04:48,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86543155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:48,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396249752] [2021-10-28 09:04:48,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:04:48,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:48,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:48,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:04:48,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:04:48,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:48,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:04:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-10-28 09:04:48,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396249752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:48,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:48,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2021-10-28 09:04:48,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531868947] [2021-10-28 09:04:48,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:04:48,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:04:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:04:48,899 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:48,970 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-10-28 09:04:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:04:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 09:04:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:48,972 INFO L225 Difference]: With dead ends: 49 [2021-10-28 09:04:48,972 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 09:04:48,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:04:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 09:04:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-10-28 09:04:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-28 09:04:48,989 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2021-10-28 09:04:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:48,991 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-28 09:04:48,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-28 09:04:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:04:48,996 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:48,996 INFO L513 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:49,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:49,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:04:49,223 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:49,223 INFO L85 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 10 times [2021-10-28 09:04:49,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:49,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125298607] [2021-10-28 09:04:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:49,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:04:49,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:49,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125298607] [2021-10-28 09:04:49,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125298607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:49,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453518467] [2021-10-28 09:04:49,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:04:49,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:49,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:49,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:04:49,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:04:49,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:04:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:04:49,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453518467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:49,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:49,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-28 09:04:49,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021188832] [2021-10-28 09:04:49,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 09:04:49,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 09:04:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:04:49,657 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:49,704 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-10-28 09:04:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:04:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-28 09:04:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:49,705 INFO L225 Difference]: With dead ends: 52 [2021-10-28 09:04:49,705 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 09:04:49,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:04:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 09:04:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-28 09:04:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-28 09:04:49,709 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2021-10-28 09:04:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:49,709 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-28 09:04:49,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-28 09:04:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:04:49,710 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:49,711 INFO L513 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:49,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:49,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:04:49,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 11 times [2021-10-28 09:04:49,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:49,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068113334] [2021-10-28 09:04:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:49,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:04:50,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:50,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068113334] [2021-10-28 09:04:50,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068113334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:50,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632221903] [2021-10-28 09:04:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:04:50,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:50,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:50,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:04:50,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 09:04:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:50,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:04:50,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:04:50,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632221903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:50,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:50,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-28 09:04:50,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136551732] [2021-10-28 09:04:50,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:04:50,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:04:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:04:50,368 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:50,420 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-10-28 09:04:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:04:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-28 09:04:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:50,423 INFO L225 Difference]: With dead ends: 54 [2021-10-28 09:04:50,423 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 09:04:50,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:04:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 09:04:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-28 09:04:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-10-28 09:04:50,429 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2021-10-28 09:04:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:50,429 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-10-28 09:04:50,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-10-28 09:04:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 09:04:50,430 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:50,430 INFO L513 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:50,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:50,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:04:50,631 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 172515501, now seen corresponding path program 12 times [2021-10-28 09:04:50,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:50,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612543975] [2021-10-28 09:04:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:50,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:04:50,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:50,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612543975] [2021-10-28 09:04:50,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612543975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:50,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584703078] [2021-10-28 09:04:50,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:04:50,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:50,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:50,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:50,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:04:50,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-10-28 09:04:50,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:50,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:04:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-10-28 09:04:51,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584703078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:51,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:51,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2021-10-28 09:04:51,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926691096] [2021-10-28 09:04:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:04:51,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:04:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:04:51,137 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:51,223 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-10-28 09:04:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:04:51,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-28 09:04:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:51,224 INFO L225 Difference]: With dead ends: 59 [2021-10-28 09:04:51,224 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 09:04:51,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:04:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 09:04:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-10-28 09:04:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-10-28 09:04:51,230 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-10-28 09:04:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-10-28 09:04:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-10-28 09:04:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:04:51,231 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:51,232 INFO L513 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:51,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:04:51,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:04:51,448 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 13 times [2021-10-28 09:04:51,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:51,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333218286] [2021-10-28 09:04:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:51,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:04:51,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:51,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333218286] [2021-10-28 09:04:51,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333218286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:51,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293400345] [2021-10-28 09:04:51,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:04:51,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:51,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:51,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:04:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:04:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:04:51,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293400345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:51,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:51,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-28 09:04:51,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863235509] [2021-10-28 09:04:51,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:04:51,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:04:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:04:51,964 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:52,011 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-28 09:04:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:04:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 09:04:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:52,012 INFO L225 Difference]: With dead ends: 62 [2021-10-28 09:04:52,012 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 09:04:52,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:04:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 09:04:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-28 09:04:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-10-28 09:04:52,017 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2021-10-28 09:04:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:52,018 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-10-28 09:04:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-10-28 09:04:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 09:04:52,019 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:52,019 INFO L513 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:52,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:52,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:52,235 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:52,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 14 times [2021-10-28 09:04:52,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:52,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265615303] [2021-10-28 09:04:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:52,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:04:52,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:52,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265615303] [2021-10-28 09:04:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265615303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:52,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067361115] [2021-10-28 09:04:52,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:04:52,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:52,431 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:52,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:04:52,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:04:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:04:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:04:52,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067361115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:52,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:52,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-28 09:04:52,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640280305] [2021-10-28 09:04:52,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:04:52,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:52,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:04:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:04:52,742 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:52,808 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-10-28 09:04:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:04:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-28 09:04:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:52,809 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:04:52,809 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:04:52,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:04:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:04:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 09:04:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-10-28 09:04:52,825 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2021-10-28 09:04:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-10-28 09:04:52,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-10-28 09:04:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 09:04:52,828 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:52,828 INFO L513 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:52,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:53,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:04:53,043 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1185460165, now seen corresponding path program 15 times [2021-10-28 09:04:53,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:53,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349487861] [2021-10-28 09:04:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:53,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:04:53,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:53,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349487861] [2021-10-28 09:04:53,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349487861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:53,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698670402] [2021-10-28 09:04:53,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:04:53,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:53,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:53,267 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:53,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:04:53,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:04:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:04:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-10-28 09:04:53,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698670402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:53,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:53,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2021-10-28 09:04:53,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033212071] [2021-10-28 09:04:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:04:53,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:04:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:04:53,678 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:53,764 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-10-28 09:04:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:04:53,765 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-28 09:04:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:53,766 INFO L225 Difference]: With dead ends: 69 [2021-10-28 09:04:53,766 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 09:04:53,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:04:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 09:04:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-10-28 09:04:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-28 09:04:53,771 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2021-10-28 09:04:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:53,772 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-28 09:04:53,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-10-28 09:04:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 09:04:53,773 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:53,773 INFO L513 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:53,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:53,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:53,995 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 16 times [2021-10-28 09:04:53,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:53,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576014154] [2021-10-28 09:04:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:53,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 09:04:54,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:54,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576014154] [2021-10-28 09:04:54,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576014154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:54,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786164683] [2021-10-28 09:04:54,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:04:54,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:54,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:54,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:54,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:04:54,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:04:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:04:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 09:04:54,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786164683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:54,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:54,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-28 09:04:54,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92104428] [2021-10-28 09:04:54,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:04:54,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:54,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:04:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:04:54,640 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:54,694 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-10-28 09:04:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:04:54,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-28 09:04:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:54,695 INFO L225 Difference]: With dead ends: 72 [2021-10-28 09:04:54,695 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:04:54,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:04:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:04:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 09:04:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-10-28 09:04:54,702 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-10-28 09:04:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:54,702 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-10-28 09:04:54,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-10-28 09:04:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 09:04:54,704 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:54,704 INFO L513 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:54,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:54,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:54,920 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 17 times [2021-10-28 09:04:54,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:54,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869322531] [2021-10-28 09:04:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:54,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 09:04:55,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:55,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869322531] [2021-10-28 09:04:55,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869322531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:55,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584776499] [2021-10-28 09:04:55,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:04:55,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:55,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:55,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:55,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:04:55,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-10-28 09:04:55,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:04:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 09:04:55,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584776499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:55,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:55,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-28 09:04:55,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118699533] [2021-10-28 09:04:55,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:04:55,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:04:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:04:55,708 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:55,791 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-28 09:04:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:04:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-28 09:04:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:55,793 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:04:55,793 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 09:04:55,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:04:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 09:04:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-28 09:04:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-10-28 09:04:55,803 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2021-10-28 09:04:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:55,803 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-10-28 09:04:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-10-28 09:04:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:04:55,805 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:55,805 INFO L513 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:55,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:56,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:04:56,031 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash -575792311, now seen corresponding path program 18 times [2021-10-28 09:04:56,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:56,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652700600] [2021-10-28 09:04:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:56,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 09:04:56,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:56,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652700600] [2021-10-28 09:04:56,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652700600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:56,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176030695] [2021-10-28 09:04:56,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:04:56,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:56,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:56,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:04:56,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-10-28 09:04:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:56,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:04:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-10-28 09:04:56,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176030695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:56,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:56,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2021-10-28 09:04:56,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079467804] [2021-10-28 09:04:56,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:04:56,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:04:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:04:56,890 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:57,036 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-10-28 09:04:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:04:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-28 09:04:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:57,039 INFO L225 Difference]: With dead ends: 79 [2021-10-28 09:04:57,039 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:04:57,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:04:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:04:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-10-28 09:04:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-10-28 09:04:57,044 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 58 [2021-10-28 09:04:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:57,045 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-10-28 09:04:57,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-10-28 09:04:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 09:04:57,046 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:57,046 INFO L513 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:57,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 09:04:57,267 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 19 times [2021-10-28 09:04:57,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:57,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925982199] [2021-10-28 09:04:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:57,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:04:57,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:57,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925982199] [2021-10-28 09:04:57,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925982199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:57,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557735710] [2021-10-28 09:04:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:04:57,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:57,550 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:57,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:04:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:04:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:04:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557735710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:57,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:57,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-28 09:04:57,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592476584] [2021-10-28 09:04:57,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:04:57,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:04:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:04:57,975 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:58,028 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-10-28 09:04:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:04:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-10-28 09:04:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:58,029 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:04:58,029 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 09:04:58,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:04:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 09:04:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 09:04:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-28 09:04:58,033 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 62 [2021-10-28 09:04:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:58,033 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-28 09:04:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-28 09:04:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 09:04:58,034 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:58,035 INFO L513 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:58,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 09:04:58,239 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:58,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 20 times [2021-10-28 09:04:58,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:58,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385132229] [2021-10-28 09:04:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:58,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:04:58,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:58,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385132229] [2021-10-28 09:04:58,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385132229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:58,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523663956] [2021-10-28 09:04:58,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:04:58,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:58,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:58,599 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:58,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:04:58,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:04:58,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:58,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 09:04:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:04:59,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523663956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:59,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:59,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-28 09:04:59,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816506025] [2021-10-28 09:04:59,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:04:59,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:04:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:04:59,107 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:59,180 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-10-28 09:04:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:04:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-10-28 09:04:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:59,182 INFO L225 Difference]: With dead ends: 84 [2021-10-28 09:04:59,182 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 09:04:59,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:04:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 09:04:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-28 09:04:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-10-28 09:04:59,185 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2021-10-28 09:04:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:59,186 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-10-28 09:04:59,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:04:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-10-28 09:04:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 09:04:59,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:59,187 INFO L513 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:59,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:59,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:59,403 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:04:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1179443671, now seen corresponding path program 21 times [2021-10-28 09:04:59,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:59,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4622177] [2021-10-28 09:04:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:59,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 09:04:59,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:59,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4622177] [2021-10-28 09:04:59,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4622177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:59,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777694007] [2021-10-28 09:04:59,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:04:59,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:59,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:59,713 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:59,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:04:59,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-10-28 09:04:59,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:04:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-10-28 09:05:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777694007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:00,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:00,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2021-10-28 09:05:00,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648986633] [2021-10-28 09:05:00,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 09:05:00,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 09:05:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:05:00,287 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:00,412 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-10-28 09:05:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:05:00,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-10-28 09:05:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:00,413 INFO L225 Difference]: With dead ends: 89 [2021-10-28 09:05:00,413 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:05:00,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:05:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:05:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-10-28 09:05:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-28 09:05:00,417 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 66 [2021-10-28 09:05:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:00,418 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-28 09:05:00,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-28 09:05:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:05:00,419 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:00,419 INFO L513 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:00,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:00,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:00,627 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:00,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 22 times [2021-10-28 09:05:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:00,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015191419] [2021-10-28 09:05:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:00,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:05:00,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:00,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015191419] [2021-10-28 09:05:00,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015191419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:00,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742142251] [2021-10-28 09:05:00,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:05:00,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:00,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:00,986 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:05:01,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:05:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:01,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:05:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:05:01,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742142251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:01,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:01,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-10-28 09:05:01,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62820980] [2021-10-28 09:05:01,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:05:01,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:01,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:05:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:05:01,536 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:01,594 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-10-28 09:05:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:05:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-10-28 09:05:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:01,596 INFO L225 Difference]: With dead ends: 92 [2021-10-28 09:05:01,596 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 09:05:01,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:05:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 09:05:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-28 09:05:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-10-28 09:05:01,601 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2021-10-28 09:05:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:01,602 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-10-28 09:05:01,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-10-28 09:05:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 09:05:01,611 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:01,611 INFO L513 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:01,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:01,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:01,827 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 23 times [2021-10-28 09:05:01,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:01,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888243444] [2021-10-28 09:05:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:01,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:05:02,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:02,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888243444] [2021-10-28 09:05:02,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888243444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:02,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239784959] [2021-10-28 09:05:02,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:05:02,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:02,212 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:02,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:05:02,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-10-28 09:05:02,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:05:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:05:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239784959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:02,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:02,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-10-28 09:05:02,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135278651] [2021-10-28 09:05:02,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:05:02,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:05:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:05:02,807 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:02,886 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-10-28 09:05:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:05:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-28 09:05:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:02,888 INFO L225 Difference]: With dead ends: 94 [2021-10-28 09:05:02,888 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:05:02,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:05:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:05:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 09:05:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-28 09:05:02,893 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2021-10-28 09:05:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:02,894 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-28 09:05:02,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-28 09:05:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-28 09:05:02,895 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:02,895 INFO L513 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:03,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:05:03,120 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:03,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1772864485, now seen corresponding path program 24 times [2021-10-28 09:05:03,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:03,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804335432] [2021-10-28 09:05:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:03,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:05:03,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:03,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804335432] [2021-10-28 09:05:03,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804335432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:03,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760220247] [2021-10-28 09:05:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:05:03,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:03,525 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:03,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:05:03,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-10-28 09:05:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:05:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-10-28 09:05:04,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760220247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:04,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:04,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2021-10-28 09:05:04,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497622154] [2021-10-28 09:05:04,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 09:05:04,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 09:05:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:05:04,238 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:04,398 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-10-28 09:05:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:05:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-28 09:05:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:04,399 INFO L225 Difference]: With dead ends: 99 [2021-10-28 09:05:04,399 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:05:04,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:05:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:05:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-10-28 09:05:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-10-28 09:05:04,403 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 74 [2021-10-28 09:05:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:04,403 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-10-28 09:05:04,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-10-28 09:05:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 09:05:04,404 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:04,404 INFO L513 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:04,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-28 09:05:04,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:05:04,619 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 25 times [2021-10-28 09:05:04,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:04,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625821] [2021-10-28 09:05:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:04,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:05:05,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:05,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625821] [2021-10-28 09:05:05,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:05,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067374194] [2021-10-28 09:05:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:05:05,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:05,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:05,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:05:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:05:05,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:05:05,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067374194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:05,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:05,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-28 09:05:05,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329333202] [2021-10-28 09:05:05,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:05:05,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:05:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:05:05,585 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:05,661 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-10-28 09:05:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:05:05,662 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-28 09:05:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:05,663 INFO L225 Difference]: With dead ends: 102 [2021-10-28 09:05:05,672 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:05:05,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:05:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:05:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 09:05:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-10-28 09:05:05,677 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 78 [2021-10-28 09:05:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:05,678 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-10-28 09:05:05,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-10-28 09:05:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-28 09:05:05,679 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:05,679 INFO L513 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:05,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:05,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:05:05,895 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 26 times [2021-10-28 09:05:05,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:05,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647461368] [2021-10-28 09:05:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:05,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:05:06,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:06,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647461368] [2021-10-28 09:05:06,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647461368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:06,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287515745] [2021-10-28 09:05:06,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:05:06,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:06,407 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:06,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:05:06,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:05:06,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 09:05:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:05:07,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287515745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:07,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:07,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-28 09:05:07,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590872161] [2021-10-28 09:05:07,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:05:07,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:05:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:05:07,197 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:07,264 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-10-28 09:05:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:05:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-28 09:05:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:07,267 INFO L225 Difference]: With dead ends: 104 [2021-10-28 09:05:07,267 INFO L226 Difference]: Without dead ends: 83 [2021-10-28 09:05:07,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:05:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-28 09:05:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-28 09:05:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-10-28 09:05:07,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2021-10-28 09:05:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:07,274 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-10-28 09:05:07,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-10-28 09:05:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 09:05:07,275 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:07,276 INFO L513 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:07,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 09:05:07,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:07,479 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1740300659, now seen corresponding path program 27 times [2021-10-28 09:05:07,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:07,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489489665] [2021-10-28 09:05:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:07,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:05:07,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:07,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489489665] [2021-10-28 09:05:07,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489489665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:07,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021459495] [2021-10-28 09:05:07,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:05:07,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:07,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:07,975 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:07,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:05:08,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-28 09:05:08,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:08,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:05:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-10-28 09:05:08,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021459495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:08,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:08,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2021-10-28 09:05:08,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615503553] [2021-10-28 09:05:08,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 09:05:08,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 09:05:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:05:08,973 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:09,149 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-10-28 09:05:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:05:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-10-28 09:05:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:09,151 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:05:09,151 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 09:05:09,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:05:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 09:05:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-10-28 09:05:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-10-28 09:05:09,156 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2021-10-28 09:05:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-10-28 09:05:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-10-28 09:05:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 09:05:09,157 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:09,157 INFO L513 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:09,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-28 09:05:09,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:09,359 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:09,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 28 times [2021-10-28 09:05:09,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:09,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104087383] [2021-10-28 09:05:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:09,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-28 09:05:09,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:09,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104087383] [2021-10-28 09:05:09,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104087383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:09,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153589437] [2021-10-28 09:05:09,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:05:09,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:09,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:09,793 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:09,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:05:10,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:05:10,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:05:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-28 09:05:10,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153589437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:10,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:10,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-10-28 09:05:10,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991001314] [2021-10-28 09:05:10,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:05:10,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:05:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:05:10,418 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:10,502 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-10-28 09:05:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:05:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-10-28 09:05:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:10,504 INFO L225 Difference]: With dead ends: 112 [2021-10-28 09:05:10,504 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 09:05:10,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:05:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 09:05:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-28 09:05:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 88 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-10-28 09:05:10,509 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 86 [2021-10-28 09:05:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:10,510 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-10-28 09:05:10,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-10-28 09:05:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 09:05:10,511 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:10,511 INFO L513 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:10,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:10,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:10,730 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 29 times [2021-10-28 09:05:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:10,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535365667] [2021-10-28 09:05:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:10,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-28 09:05:11,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:11,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535365667] [2021-10-28 09:05:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535365667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:11,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109937155] [2021-10-28 09:05:11,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:05:11,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:11,222 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:11,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:05:11,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-10-28 09:05:11,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 09:05:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-28 09:05:11,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109937155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:11,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:11,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-10-28 09:05:11,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104539818] [2021-10-28 09:05:11,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 09:05:11,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:11,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 09:05:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:05:11,974 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:12,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:12,067 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-10-28 09:05:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 09:05:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-10-28 09:05:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:12,069 INFO L225 Difference]: With dead ends: 114 [2021-10-28 09:05:12,069 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 09:05:12,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:05:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 09:05:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-28 09:05:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-10-28 09:05:12,076 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2021-10-28 09:05:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:12,076 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-10-28 09:05:12,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-10-28 09:05:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-28 09:05:12,078 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:12,078 INFO L513 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:12,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-28 09:05:12,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:12,287 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1948099967, now seen corresponding path program 30 times [2021-10-28 09:05:12,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:12,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790856641] [2021-10-28 09:05:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:12,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-28 09:05:12,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:12,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790856641] [2021-10-28 09:05:12,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790856641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:12,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074198105] [2021-10-28 09:05:12,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:05:12,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:12,808 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:12,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:05:13,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-10-28 09:05:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:05:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-10-28 09:05:13,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074198105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:13,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:13,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2021-10-28 09:05:13,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077627989] [2021-10-28 09:05:13,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 09:05:13,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 09:05:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:05:13,773 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:14,012 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2021-10-28 09:05:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 09:05:14,013 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-28 09:05:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:14,015 INFO L225 Difference]: With dead ends: 119 [2021-10-28 09:05:14,015 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 09:05:14,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:05:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 09:05:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-10-28 09:05:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-10-28 09:05:14,021 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 90 [2021-10-28 09:05:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-10-28 09:05:14,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-10-28 09:05:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:05:14,023 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:14,024 INFO L513 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:14,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:14,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:14,250 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 31 times [2021-10-28 09:05:14,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:14,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527106456] [2021-10-28 09:05:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:14,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-28 09:05:14,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:14,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527106456] [2021-10-28 09:05:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527106456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:14,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417217273] [2021-10-28 09:05:14,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:05:14,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:14,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:14,830 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:14,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 09:05:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:05:15,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-28 09:05:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417217273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:15,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-28 09:05:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165918946] [2021-10-28 09:05:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 09:05:15,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 09:05:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:05:15,643 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:15,778 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-10-28 09:05:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 09:05:15,778 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-10-28 09:05:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:15,780 INFO L225 Difference]: With dead ends: 122 [2021-10-28 09:05:15,781 INFO L226 Difference]: Without dead ends: 97 [2021-10-28 09:05:15,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:05:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-28 09:05:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-28 09:05:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 96 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-10-28 09:05:15,787 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 94 [2021-10-28 09:05:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:15,787 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-10-28 09:05:15,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-10-28 09:05:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-28 09:05:15,789 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:15,789 INFO L513 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:15,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:16,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:16,003 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 32 times [2021-10-28 09:05:16,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:16,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082685217] [2021-10-28 09:05:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:16,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-28 09:05:16,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:16,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082685217] [2021-10-28 09:05:16,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082685217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:16,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792741761] [2021-10-28 09:05:16,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:05:16,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:16,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:16,555 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:16,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 09:05:17,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:05:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:05:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-28 09:05:17,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792741761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:17,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-10-28 09:05:17,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053573309] [2021-10-28 09:05:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 09:05:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 09:05:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:05:17,435 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:17,506 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-10-28 09:05:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:05:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-10-28 09:05:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:17,507 INFO L225 Difference]: With dead ends: 124 [2021-10-28 09:05:17,507 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:05:17,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:05:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:05:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-28 09:05:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-10-28 09:05:17,512 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2021-10-28 09:05:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:17,513 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-10-28 09:05:17,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-10-28 09:05:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 09:05:17,519 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:17,519 INFO L513 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:17,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-28 09:05:17,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 09:05:17,727 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551375, now seen corresponding path program 33 times [2021-10-28 09:05:17,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:17,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058414510] [2021-10-28 09:05:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:17,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-28 09:05:18,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:18,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058414510] [2021-10-28 09:05:18,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058414510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:18,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179737317] [2021-10-28 09:05:18,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:05:18,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:18,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:18,401 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:18,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 09:05:19,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-28 09:05:19,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:19,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:05:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-10-28 09:05:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179737317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:19,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:19,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2021-10-28 09:05:19,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581200499] [2021-10-28 09:05:19,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 09:05:19,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 09:05:19,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:05:19,597 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:19,780 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-10-28 09:05:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 09:05:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-28 09:05:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:19,782 INFO L225 Difference]: With dead ends: 129 [2021-10-28 09:05:19,782 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 09:05:19,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:05:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 09:05:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-10-28 09:05:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 102 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-10-28 09:05:19,787 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 98 [2021-10-28 09:05:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:19,787 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-10-28 09:05:19,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-10-28 09:05:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-28 09:05:19,788 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:19,789 INFO L513 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:19,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:20,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 09:05:20,003 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 34 times [2021-10-28 09:05:20,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:20,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879291459] [2021-10-28 09:05:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:20,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:05:20,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:20,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879291459] [2021-10-28 09:05:20,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879291459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:20,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954706193] [2021-10-28 09:05:20,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:05:20,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:20,680 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:20,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 09:05:21,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:05:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 09:05:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:05:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954706193] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:21,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:21,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-10-28 09:05:21,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174987161] [2021-10-28 09:05:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:05:21,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:05:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:05:21,525 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:21,598 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-10-28 09:05:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 09:05:21,599 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-10-28 09:05:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:21,600 INFO L225 Difference]: With dead ends: 132 [2021-10-28 09:05:21,600 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 09:05:21,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:05:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 09:05:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-28 09:05:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 104 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-10-28 09:05:21,608 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 102 [2021-10-28 09:05:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:21,609 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-10-28 09:05:21,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-10-28 09:05:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-28 09:05:21,610 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:21,610 INFO L513 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:21,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:21,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:05:21,826 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 35 times [2021-10-28 09:05:21,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:21,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096873451] [2021-10-28 09:05:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:21,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:05:22,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:22,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096873451] [2021-10-28 09:05:22,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096873451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:22,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21086972] [2021-10-28 09:05:22,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:05:22,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:22,539 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:22,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 09:05:23,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-10-28 09:05:23,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:23,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:05:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:05:23,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21086972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:23,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:23,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-10-28 09:05:23,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855078752] [2021-10-28 09:05:23,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 09:05:23,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 09:05:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:05:23,634 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:23,743 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-10-28 09:05:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 09:05:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-28 09:05:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:23,744 INFO L225 Difference]: With dead ends: 134 [2021-10-28 09:05:23,744 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 09:05:23,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:05:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 09:05:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 09:05:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-10-28 09:05:23,751 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2021-10-28 09:05:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:23,751 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-10-28 09:05:23,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-10-28 09:05:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:05:23,753 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:23,753 INFO L513 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:23,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:23,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:23,975 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -646783203, now seen corresponding path program 36 times [2021-10-28 09:05:23,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:23,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456475539] [2021-10-28 09:05:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:23,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:05:24,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:24,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456475539] [2021-10-28 09:05:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456475539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:24,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770984282] [2021-10-28 09:05:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:05:24,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:24,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:24,658 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:24,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 09:05:25,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-10-28 09:05:25,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:05:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-10-28 09:05:25,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770984282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:25,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:25,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-10-28 09:05:25,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400922910] [2021-10-28 09:05:25,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 09:05:25,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 09:05:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:05:25,867 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:26,037 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-10-28 09:05:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:05:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-10-28 09:05:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:26,039 INFO L225 Difference]: With dead ends: 139 [2021-10-28 09:05:26,039 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 09:05:26,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:05:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 09:05:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-10-28 09:05:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 110 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2021-10-28 09:05:26,045 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 106 [2021-10-28 09:05:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:26,046 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2021-10-28 09:05:26,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2021-10-28 09:05:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-28 09:05:26,047 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:26,047 INFO L513 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:26,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:26,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:05:26,262 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:26,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 37 times [2021-10-28 09:05:26,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:26,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946755382] [2021-10-28 09:05:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:26,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:05:27,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:27,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946755382] [2021-10-28 09:05:27,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946755382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:27,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175362480] [2021-10-28 09:05:27,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:05:27,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:27,008 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:27,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 09:05:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:27,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:05:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:05:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175362480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:27,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-10-28 09:05:27,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845188309] [2021-10-28 09:05:27,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:05:27,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:27,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:05:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:05:27,981 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:28,079 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2021-10-28 09:05:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 09:05:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-10-28 09:05:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:28,081 INFO L225 Difference]: With dead ends: 142 [2021-10-28 09:05:28,082 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 09:05:28,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:05:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 09:05:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-10-28 09:05:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-10-28 09:05:28,088 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 110 [2021-10-28 09:05:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:28,089 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-10-28 09:05:28,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-10-28 09:05:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 09:05:28,090 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:28,090 INFO L513 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:28,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:28,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:28,315 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 38 times [2021-10-28 09:05:28,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:28,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048782304] [2021-10-28 09:05:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:28,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:05:29,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:29,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048782304] [2021-10-28 09:05:29,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048782304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:29,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273573308] [2021-10-28 09:05:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:05:29,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:29,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:29,187 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:29,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 09:05:29,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:05:29,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:29,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 09:05:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:05:30,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273573308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:30,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:30,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-10-28 09:05:30,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683417676] [2021-10-28 09:05:30,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 09:05:30,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 09:05:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:05:30,155 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:30,274 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-10-28 09:05:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 09:05:30,275 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-10-28 09:05:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:30,276 INFO L225 Difference]: With dead ends: 144 [2021-10-28 09:05:30,276 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 09:05:30,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:05:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 09:05:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-28 09:05:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-10-28 09:05:30,292 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2021-10-28 09:05:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:30,293 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-10-28 09:05:30,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-10-28 09:05:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-28 09:05:30,294 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:30,294 INFO L513 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:30,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:30,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:30,503 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 84159147, now seen corresponding path program 39 times [2021-10-28 09:05:30,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:30,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68436734] [2021-10-28 09:05:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:30,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:05:31,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:31,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68436734] [2021-10-28 09:05:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68436734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:31,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798720663] [2021-10-28 09:05:31,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:05:31,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:31,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:31,267 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:31,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 09:05:32,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-28 09:05:32,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:05:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-28 09:05:32,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798720663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:32,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:32,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2021-10-28 09:05:32,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512056582] [2021-10-28 09:05:32,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-28 09:05:32,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:32,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-28 09:05:32,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:05:32,723 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:32,911 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2021-10-28 09:05:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 09:05:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-10-28 09:05:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:32,913 INFO L225 Difference]: With dead ends: 149 [2021-10-28 09:05:32,913 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 09:05:32,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:05:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 09:05:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-10-28 09:05:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-10-28 09:05:32,919 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 114 [2021-10-28 09:05:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:32,919 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-10-28 09:05:32,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-10-28 09:05:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:05:32,920 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:32,920 INFO L513 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:32,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:33,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 09:05:33,135 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 40 times [2021-10-28 09:05:33,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:33,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476683684] [2021-10-28 09:05:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:33,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-28 09:05:33,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:33,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476683684] [2021-10-28 09:05:33,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476683684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:33,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103057723] [2021-10-28 09:05:33,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:05:33,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:33,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:33,920 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:33,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 09:05:34,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:05:34,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 09:05:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-28 09:05:34,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103057723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:34,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:34,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-10-28 09:05:34,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863867745] [2021-10-28 09:05:34,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 09:05:34,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 09:05:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:05:34,987 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:35,069 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2021-10-28 09:05:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 09:05:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-10-28 09:05:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:35,071 INFO L225 Difference]: With dead ends: 152 [2021-10-28 09:05:35,071 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 09:05:35,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:05:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 09:05:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-10-28 09:05:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 120 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-10-28 09:05:35,077 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 118 [2021-10-28 09:05:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:35,077 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-10-28 09:05:35,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-10-28 09:05:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-28 09:05:35,079 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:35,079 INFO L513 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:35,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:35,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:35,295 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash -411073194, now seen corresponding path program 41 times [2021-10-28 09:05:35,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:35,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995461677] [2021-10-28 09:05:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:35,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-28 09:05:36,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:36,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995461677] [2021-10-28 09:05:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995461677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:36,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769600197] [2021-10-28 09:05:36,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:05:36,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:36,109 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:36,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 09:05:36,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-10-28 09:05:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:05:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-28 09:05:37,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769600197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:37,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:37,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-10-28 09:05:37,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695776099] [2021-10-28 09:05:37,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 09:05:37,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:37,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 09:05:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:05:37,215 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:37,346 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2021-10-28 09:05:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 09:05:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-10-28 09:05:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:37,348 INFO L225 Difference]: With dead ends: 154 [2021-10-28 09:05:37,348 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 09:05:37,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:05:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 09:05:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-10-28 09:05:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-10-28 09:05:37,354 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2021-10-28 09:05:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:37,354 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-10-28 09:05:37,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-10-28 09:05:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-28 09:05:37,355 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:37,355 INFO L513 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:37,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 09:05:37,573 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash -553758279, now seen corresponding path program 42 times [2021-10-28 09:05:37,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:37,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958015775] [2021-10-28 09:05:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:37,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-28 09:05:38,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:38,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958015775] [2021-10-28 09:05:38,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958015775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:38,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563903287] [2021-10-28 09:05:38,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:05:38,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:38,587 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:38,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 09:05:39,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-10-28 09:05:39,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:39,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:05:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-10-28 09:05:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563903287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:40,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2021-10-28 09:05:40,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850383133] [2021-10-28 09:05:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 09:05:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 09:05:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 09:05:40,273 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:40,548 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-10-28 09:05:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 09:05:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-28 09:05:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:40,550 INFO L225 Difference]: With dead ends: 159 [2021-10-28 09:05:40,551 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 09:05:40,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 09:05:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 09:05:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-10-28 09:05:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.119047619047619) internal successors, (141), 126 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-10-28 09:05:40,556 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 122 [2021-10-28 09:05:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:40,557 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-10-28 09:05:40,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-10-28 09:05:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-28 09:05:40,558 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:40,558 INFO L513 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:40,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:40,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 09:05:40,767 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1685652673, now seen corresponding path program 43 times [2021-10-28 09:05:40,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:40,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053651513] [2021-10-28 09:05:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:40,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-28 09:05:41,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:41,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053651513] [2021-10-28 09:05:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053651513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:41,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791230228] [2021-10-28 09:05:41,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:05:41,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:41,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:41,835 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:41,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 09:05:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 09:05:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-28 09:05:43,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791230228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:43,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:43,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-10-28 09:05:43,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824490081] [2021-10-28 09:05:43,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 09:05:43,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:43,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 09:05:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:05:43,103 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:43,233 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-10-28 09:05:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-28 09:05:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-10-28 09:05:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:43,235 INFO L225 Difference]: With dead ends: 162 [2021-10-28 09:05:43,235 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 09:05:43,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:05:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 09:05:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-28 09:05:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1171875) internal successors, (143), 128 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-10-28 09:05:43,241 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 126 [2021-10-28 09:05:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:43,241 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-10-28 09:05:43,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 50 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-10-28 09:05:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-28 09:05:43,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:43,243 INFO L513 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:43,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:43,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:43,456 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash 834124516, now seen corresponding path program 44 times [2021-10-28 09:05:43,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:43,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530387939] [2021-10-28 09:05:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:43,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-28 09:05:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530387939] [2021-10-28 09:05:44,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530387939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539530835] [2021-10-28 09:05:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:05:44,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:44,344 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:44,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 09:05:45,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:05:45,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:45,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 09:05:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-28 09:05:45,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539530835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:45,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-10-28 09:05:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181529439] [2021-10-28 09:05:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 09:05:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 09:05:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:05:45,596 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:45,686 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2021-10-28 09:05:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 09:05:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-10-28 09:05:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:45,688 INFO L225 Difference]: With dead ends: 164 [2021-10-28 09:05:45,688 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 09:05:45,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:05:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 09:05:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-10-28 09:05:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-10-28 09:05:45,694 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2021-10-28 09:05:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:45,694 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-10-28 09:05:45,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-10-28 09:05:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 09:05:45,696 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:45,696 INFO L513 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:45,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-28 09:05:45,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:45,915 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1440648121, now seen corresponding path program 45 times [2021-10-28 09:05:45,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:45,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267195058] [2021-10-28 09:05:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:45,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-28 09:05:46,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:46,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267195058] [2021-10-28 09:05:46,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267195058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:46,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951926991] [2021-10-28 09:05:46,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:05:46,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:46,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:46,961 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:46,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 09:05:47,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-10-28 09:05:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:05:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-10-28 09:05:48,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951926991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:48,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:48,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2021-10-28 09:05:48,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069241115] [2021-10-28 09:05:48,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 09:05:48,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 09:05:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:05:48,726 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:48,935 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2021-10-28 09:05:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-28 09:05:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-10-28 09:05:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:48,940 INFO L225 Difference]: With dead ends: 169 [2021-10-28 09:05:48,940 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 09:05:48,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:05:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 09:05:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-10-28 09:05:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 134 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-10-28 09:05:48,947 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 130 [2021-10-28 09:05:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:48,948 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-10-28 09:05:48,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-10-28 09:05:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-28 09:05:48,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:48,949 INFO L513 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:48,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:49,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 09:05:49,165 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:49,165 INFO L85 PathProgramCache]: Analyzing trace with hash -83220273, now seen corresponding path program 46 times [2021-10-28 09:05:49,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:49,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369789941] [2021-10-28 09:05:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:49,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-28 09:05:50,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:50,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369789941] [2021-10-28 09:05:50,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369789941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:50,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127739518] [2021-10-28 09:05:50,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:05:50,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:50,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:50,216 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:50,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 09:05:51,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:05:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:05:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-28 09:05:51,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127739518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:51,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:51,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-10-28 09:05:51,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123256526] [2021-10-28 09:05:51,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-28 09:05:51,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-28 09:05:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:05:51,553 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:51,647 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2021-10-28 09:05:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 09:05:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-10-28 09:05:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:51,649 INFO L225 Difference]: With dead ends: 172 [2021-10-28 09:05:51,649 INFO L226 Difference]: Without dead ends: 137 [2021-10-28 09:05:51,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:05:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-28 09:05:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-28 09:05:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 136 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2021-10-28 09:05:51,655 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 134 [2021-10-28 09:05:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:51,655 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2021-10-28 09:05:51,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 53 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2021-10-28 09:05:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-28 09:05:51,657 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:51,657 INFO L513 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:51,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-28 09:05:51,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 09:05:51,875 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1769075726, now seen corresponding path program 47 times [2021-10-28 09:05:51,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:51,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107652136] [2021-10-28 09:05:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:51,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:05:53,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:53,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107652136] [2021-10-28 09:05:53,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107652136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:53,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830828660] [2021-10-28 09:05:53,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:05:53,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:53,637 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 09:05:54,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-10-28 09:05:54,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:05:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:05:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:05:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-10-28 09:05:55,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830828660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:55,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:05:55,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 35] total 85 [2021-10-28 09:05:55,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594208652] [2021-10-28 09:05:55,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-10-28 09:05:55,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:05:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-10-28 09:05:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 09:05:55,869 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:05:56,284 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2021-10-28 09:05:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-10-28 09:05:56,285 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-10-28 09:05:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:05:56,286 INFO L225 Difference]: With dead ends: 178 [2021-10-28 09:05:56,287 INFO L226 Difference]: Without dead ends: 174 [2021-10-28 09:05:56,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 09:05:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-28 09:05:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-10-28 09:05:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.197674418604651) internal successors, (206), 172 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2021-10-28 09:05:56,294 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 136 [2021-10-28 09:05:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:05:56,295 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2021-10-28 09:05:56,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:05:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2021-10-28 09:05:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-10-28 09:05:56,297 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:05:56,297 INFO L513 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1] [2021-10-28 09:05:56,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-28 09:05:56,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:56,519 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:05:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:05:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 823112396, now seen corresponding path program 48 times [2021-10-28 09:05:56,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:05:56,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382458152] [2021-10-28 09:05:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:05:56,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:05:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:05:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:05:59,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:05:59,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382458152] [2021-10-28 09:05:59,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382458152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:05:59,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711065013] [2021-10-28 09:05:59,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:05:59,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:05:59,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:05:59,094 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:05:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 09:06:00,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-10-28 09:06:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:00,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:06:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-28 09:06:01,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711065013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:01,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:01,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 44] total 94 [2021-10-28 09:06:01,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576192030] [2021-10-28 09:06:01,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-10-28 09:06:01,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-10-28 09:06:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 09:06:01,073 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:01,678 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2021-10-28 09:06:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-28 09:06:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-10-28 09:06:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:01,682 INFO L225 Difference]: With dead ends: 196 [2021-10-28 09:06:01,682 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 09:06:01,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 09:06:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 09:06:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-10-28 09:06:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2263157894736842) internal successors, (233), 190 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-10-28 09:06:01,690 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 172 [2021-10-28 09:06:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:01,690 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-10-28 09:06:01,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-10-28 09:06:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-10-28 09:06:01,692 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:01,692 INFO L513 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:01,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:01,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-28 09:06:01,911 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1326856103, now seen corresponding path program 49 times [2021-10-28 09:06:01,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:01,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753582690] [2021-10-28 09:06:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:01,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:05,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:05,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753582690] [2021-10-28 09:06:05,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753582690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:05,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967473771] [2021-10-28 09:06:05,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:06:05,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:05,082 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:05,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-28 09:06:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-28 09:06:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:06,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967473771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:06,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:06,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-10-28 09:06:06,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397016544] [2021-10-28 09:06:06,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-28 09:06:06,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-28 09:06:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 09:06:06,671 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:07,322 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2021-10-28 09:06:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-10-28 09:06:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-10-28 09:06:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:07,324 INFO L225 Difference]: With dead ends: 198 [2021-10-28 09:06:07,324 INFO L226 Difference]: Without dead ends: 194 [2021-10-28 09:06:07,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 09:06:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-28 09:06:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-10-28 09:06:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.2291666666666667) internal successors, (236), 192 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 236 transitions. [2021-10-28 09:06:07,331 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 236 transitions. Word has length 190 [2021-10-28 09:06:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:07,332 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 236 transitions. [2021-10-28 09:06:07,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 236 transitions. [2021-10-28 09:06:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-10-28 09:06:07,334 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:07,334 INFO L513 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:07,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:07,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:07,554 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 548761726, now seen corresponding path program 50 times [2021-10-28 09:06:07,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:07,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413849635] [2021-10-28 09:06:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:07,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:10,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:10,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413849635] [2021-10-28 09:06:10,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413849635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:10,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487654336] [2021-10-28 09:06:10,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:06:10,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:10,743 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:10,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-28 09:06:11,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:06:11,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:11,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-28 09:06:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:12,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487654336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:12,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:12,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-10-28 09:06:12,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601503914] [2021-10-28 09:06:12,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-28 09:06:12,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-28 09:06:12,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:06:12,474 INFO L87 Difference]: Start difference. First operand 193 states and 236 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:13,191 INFO L93 Difference]: Finished difference Result 200 states and 245 transitions. [2021-10-28 09:06:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-28 09:06:13,191 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-10-28 09:06:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:13,193 INFO L225 Difference]: With dead ends: 200 [2021-10-28 09:06:13,193 INFO L226 Difference]: Without dead ends: 196 [2021-10-28 09:06:13,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:06:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-28 09:06:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-10-28 09:06:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.231958762886598) internal successors, (239), 194 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 239 transitions. [2021-10-28 09:06:13,201 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 239 transitions. Word has length 192 [2021-10-28 09:06:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:13,201 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 239 transitions. [2021-10-28 09:06:13,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 239 transitions. [2021-10-28 09:06:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-10-28 09:06:13,203 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:13,203 INFO L513 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:13,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-28 09:06:13,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:13,431 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash -868768925, now seen corresponding path program 51 times [2021-10-28 09:06:13,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:13,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717112569] [2021-10-28 09:06:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:13,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:16,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717112569] [2021-10-28 09:06:16,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717112569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069919270] [2021-10-28 09:06:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:06:16,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:16,649 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:16,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-28 09:06:17,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-10-28 09:06:17,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 09:06:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4450 proven. 1936 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-10-28 09:06:18,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069919270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:18,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:18,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2021-10-28 09:06:18,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136094210] [2021-10-28 09:06:18,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-28 09:06:18,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:18,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-28 09:06:18,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:06:18,412 INFO L87 Difference]: Start difference. First operand 195 states and 239 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:19,060 INFO L93 Difference]: Finished difference Result 202 states and 248 transitions. [2021-10-28 09:06:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-28 09:06:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-10-28 09:06:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:19,061 INFO L225 Difference]: With dead ends: 202 [2021-10-28 09:06:19,061 INFO L226 Difference]: Without dead ends: 198 [2021-10-28 09:06:19,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:06:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-28 09:06:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-10-28 09:06:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.2346938775510203) internal successors, (242), 196 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2021-10-28 09:06:19,066 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 194 [2021-10-28 09:06:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:19,067 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2021-10-28 09:06:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2021-10-28 09:06:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-28 09:06:19,068 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:19,069 INFO L513 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:19,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:19,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-28 09:06:19,283 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1611091704, now seen corresponding path program 52 times [2021-10-28 09:06:19,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:19,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409096774] [2021-10-28 09:06:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:19,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:22,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:22,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409096774] [2021-10-28 09:06:22,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409096774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:22,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131969151] [2021-10-28 09:06:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:06:22,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:22,423 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:22,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-28 09:06:23,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:06:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-28 09:06:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:24,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131969151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:24,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:24,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-10-28 09:06:24,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997025896] [2021-10-28 09:06:24,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-10-28 09:06:24,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-10-28 09:06:24,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 09:06:24,208 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:24,902 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2021-10-28 09:06:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-28 09:06:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-10-28 09:06:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:24,904 INFO L225 Difference]: With dead ends: 204 [2021-10-28 09:06:24,904 INFO L226 Difference]: Without dead ends: 200 [2021-10-28 09:06:24,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 09:06:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-28 09:06:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-10-28 09:06:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.2373737373737375) internal successors, (245), 198 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2021-10-28 09:06:24,911 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 196 [2021-10-28 09:06:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2021-10-28 09:06:24,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2021-10-28 09:06:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-10-28 09:06:24,913 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:24,913 INFO L513 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:24,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:25,127 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2018711187, now seen corresponding path program 53 times [2021-10-28 09:06:25,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:25,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276674368] [2021-10-28 09:06:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:25,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:28,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:28,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276674368] [2021-10-28 09:06:28,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276674368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:28,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025938200] [2021-10-28 09:06:28,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:06:28,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:28,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:28,372 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:28,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-28 09:06:29,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-10-28 09:06:29,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:29,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:06:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-10-28 09:06:30,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025938200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:30,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:30,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 51] total 101 [2021-10-28 09:06:30,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777814782] [2021-10-28 09:06:30,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-10-28 09:06:30,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-10-28 09:06:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-28 09:06:30,403 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:31,156 INFO L93 Difference]: Finished difference Result 210 states and 262 transitions. [2021-10-28 09:06:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-10-28 09:06:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-10-28 09:06:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:31,159 INFO L225 Difference]: With dead ends: 210 [2021-10-28 09:06:31,159 INFO L226 Difference]: Without dead ends: 206 [2021-10-28 09:06:31,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-28 09:06:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-28 09:06:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-10-28 09:06:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.2450980392156863) internal successors, (254), 204 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 254 transitions. [2021-10-28 09:06:31,166 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 254 transitions. Word has length 198 [2021-10-28 09:06:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:31,166 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 254 transitions. [2021-10-28 09:06:31,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 254 transitions. [2021-10-28 09:06:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-10-28 09:06:31,168 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:31,168 INFO L513 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:31,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:31,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:31,390 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:31,390 INFO L85 PathProgramCache]: Analyzing trace with hash -400837860, now seen corresponding path program 54 times [2021-10-28 09:06:31,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:31,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320264154] [2021-10-28 09:06:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:31,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:34,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:34,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320264154] [2021-10-28 09:06:34,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320264154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:34,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540924678] [2021-10-28 09:06:34,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:06:34,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:34,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:34,806 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:34,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-28 09:06:36,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-10-28 09:06:36,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:36,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 09:06:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-10-28 09:06:36,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540924678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:36,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:36,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 52] total 102 [2021-10-28 09:06:36,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722416507] [2021-10-28 09:06:36,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-28 09:06:36,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-28 09:06:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 09:06:36,788 INFO L87 Difference]: Start difference. First operand 205 states and 254 transitions. Second operand has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:37,595 INFO L93 Difference]: Finished difference Result 211 states and 261 transitions. [2021-10-28 09:06:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-28 09:06:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-10-28 09:06:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:37,597 INFO L225 Difference]: With dead ends: 211 [2021-10-28 09:06:37,597 INFO L226 Difference]: Without dead ends: 207 [2021-10-28 09:06:37,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 09:06:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-28 09:06:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-10-28 09:06:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2021-10-28 09:06:37,604 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 204 [2021-10-28 09:06:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:37,605 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2021-10-28 09:06:37,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2021-10-28 09:06:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-10-28 09:06:37,606 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:37,607 INFO L513 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:37,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-28 09:06:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-28 09:06:37,823 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1394062977, now seen corresponding path program 55 times [2021-10-28 09:06:37,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:37,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133602881] [2021-10-28 09:06:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:37,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-10-28 09:06:39,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:39,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133602881] [2021-10-28 09:06:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133602881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:39,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011111175] [2021-10-28 09:06:39,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:06:39,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:39,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:39,395 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:39,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-28 09:06:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-28 09:06:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-10-28 09:06:42,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011111175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:42,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:42,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-10-28 09:06:42,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444566221] [2021-10-28 09:06:42,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:06:42,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:06:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:06:42,318 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:43,637 INFO L93 Difference]: Finished difference Result 2862 states and 4237 transitions. [2021-10-28 09:06:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:06:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-10-28 09:06:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:43,654 INFO L225 Difference]: With dead ends: 2862 [2021-10-28 09:06:43,654 INFO L226 Difference]: Without dead ends: 2858 [2021-10-28 09:06:43,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 09:06:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-10-28 09:06:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 209. [2021-10-28 09:06:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.25) internal successors, (260), 208 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 260 transitions. [2021-10-28 09:06:43,709 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 260 transitions. Word has length 206 [2021-10-28 09:06:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:43,710 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 260 transitions. [2021-10-28 09:06:43,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 260 transitions. [2021-10-28 09:06:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-10-28 09:06:43,712 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:43,712 INFO L513 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:43,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:43,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-28 09:06:43,931 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:06:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash -283085658, now seen corresponding path program 56 times [2021-10-28 09:06:43,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:43,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377484238] [2021-10-28 09:06:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:43,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-10-28 09:06:45,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:45,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377484238] [2021-10-28 09:06:45,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377484238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:45,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:45,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-10-28 09:06:45,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775089576] [2021-10-28 09:06:45,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 09:06:45,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:45,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 09:06:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:06:45,051 INFO L87 Difference]: Start difference. First operand 209 states and 260 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:45,390 INFO L93 Difference]: Finished difference Result 308 states and 408 transitions. [2021-10-28 09:06:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 09:06:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-10-28 09:06:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:45,391 INFO L225 Difference]: With dead ends: 308 [2021-10-28 09:06:45,391 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:06:45,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:06:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:06:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:06:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:06:45,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 208 [2021-10-28 09:06:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:45,393 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:06:45,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:06:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:06:45,393 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:06:45,396 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:06:45,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-10-28 09:06:45,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:06:45,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:06:45,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:06:46,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:06:48,044 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:06:48,044 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 34) no Hoare annotation was computed. [2021-10-28 09:06:48,045 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-28 09:06:48,045 INFO L860 garLoopResultBuilder]: At program point L36(lines 24 37) the Hoare annotation is: true [2021-10-28 09:06:48,045 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:06:48,045 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:06:48,045 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:06:48,045 INFO L857 garLoopResultBuilder]: For program point L28(lines 28 33) no Hoare annotation was computed. [2021-10-28 09:06:48,046 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 27 34) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 64) (<= 64 ULTIMATE.start_main_~y~0) (<= 64 ULTIMATE.start_main_~x~0) (< ULTIMATE.start_main_~x~0 65)) (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 76) (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 58 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 58) (<= 58 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 58)) (and (<= 61 ULTIMATE.start_main_~x~0) (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61)) (and (<= ULTIMATE.start_main_~y~0 89) (<= 89 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 89) (<= 89 ULTIMATE.start_main_~y~0)) (and (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 79) (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~x~0) (<= 90 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 90)) (and (<= 52 ULTIMATE.start_main_~y~0) (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 52) (< ULTIMATE.start_main_~x~0 53)) (and (<= 83 ULTIMATE.start_main_~y~0) (<= 83 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83)) (and (<= ULTIMATE.start_main_~y~0 62) (<= ULTIMATE.start_main_~x~0 62) (<= 62 ULTIMATE.start_main_~y~0) (<= 62 ULTIMATE.start_main_~x~0)) (and (<= 81 ULTIMATE.start_main_~y~0) (<= 81 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 81) (<= ULTIMATE.start_main_~y~0 81)) (and (<= ULTIMATE.start_main_~x~0 82) (<= ULTIMATE.start_main_~y~0 82) (<= 82 ULTIMATE.start_main_~x~0) (<= 82 ULTIMATE.start_main_~y~0)) (and (<= 56 ULTIMATE.start_main_~y~0) (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 56) (< ULTIMATE.start_main_~x~0 57)) (and (<= 54 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54)) (and (<= ULTIMATE.start_main_~x~0 91) (<= 91 ULTIMATE.start_main_~x~0) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 91)) (and (<= 71 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 92) (<= 92 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0)) (and (<= 50 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 50)) (and (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 96) (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0)) (and (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97) (<= 97 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and (<= 57 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 58)) (and (<= 86 ULTIMATE.start_main_~y~0) (<= 86 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 86) (<= ULTIMATE.start_main_~x~0 86)) (and (<= 94 ULTIMATE.start_main_~y~0) (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94)) (and (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74) (<= 74 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 74)) (and (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~x~0) (<= 53 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 54)) (and (<= ULTIMATE.start_main_~y~0 87) (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0) (<= 87 ULTIMATE.start_main_~y~0)) (and (<= 60 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0) (<= 65 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 100 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 100) (< 99 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 88) (<= 88 ULTIMATE.start_main_~x~0) (<= 88 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 88)) (and (<= 59 ULTIMATE.start_main_~y~0) (<= 59 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 56) (<= 55 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 70) (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (and (<= 77 ULTIMATE.start_main_~y~0) (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 77) (<= ULTIMATE.start_main_~y~0 77)) (and (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 73) (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73)) (and (<= ULTIMATE.start_main_~x~0 99) (<= 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 67) (<= 67 ULTIMATE.start_main_~x~0) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 67)) (and (< ULTIMATE.start_main_~x~0 64) (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= 63 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 93) (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 93) (<= 93 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 84) (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0) (<= 84 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 75) (<= 75 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (and (<= 68 ULTIMATE.start_main_~y~0) (<= 68 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 68) (<= ULTIMATE.start_main_~x~0 68)) (and (<= 51 ULTIMATE.start_main_~y~0) (< ULTIMATE.start_main_~x~0 52) (<= 51 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 51)) (and (<= 69 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 69) (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 69)) (and (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80) (<= 80 ULTIMATE.start_main_~y~0) (<= 80 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 95) (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~y~0)) (and (<= 78 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 78) (<= ULTIMATE.start_main_~x~0 78)) (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 72) (<= 72 ULTIMATE.start_main_~x~0)) (and (<= 66 ULTIMATE.start_main_~y~0) (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66))) [2021-10-28 09:06:48,046 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-28 09:06:48,047 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-28 09:06:48,047 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-28 09:06:48,050 INFO L731 BasicCegarLoop]: Path program histogram: [56, 2, 1, 1] [2021-10-28 09:06:48,051 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:06:48,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:06:48 BoogieIcfgContainer [2021-10-28 09:06:48,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:06:48,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:06:48,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:06:48,090 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:06:48,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:04:42" (3/4) ... [2021-10-28 09:06:48,094 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:06:48,106 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 09:06:48,106 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:06:48,106 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:06:48,107 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:06:48,138 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:06:48,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:06:48,140 INFO L168 Benchmark]: Toolchain (without parser) took 125971.13 ms. Allocated memory was 86.0 MB in the beginning and 960.5 MB in the end (delta: 874.5 MB). Free memory was 49.7 MB in the beginning and 316.3 MB in the end (delta: -266.6 MB). Peak memory consumption was 606.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:06:48,140 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 66.0 MB in the beginning and 65.9 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:06:48,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.02 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.5 MB in the beginning and 81.0 MB in the end (delta: -31.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:06:48,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 79.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:06:48,141 INFO L168 Benchmark]: Boogie Preprocessor took 19.11 ms. Allocated memory is still 104.9 MB. Free memory was 79.8 MB in the beginning and 78.8 MB in the end (delta: 933.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:06:48,142 INFO L168 Benchmark]: RCFGBuilder took 292.77 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 69.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:06:48,142 INFO L168 Benchmark]: TraceAbstraction took 125315.06 ms. Allocated memory was 104.9 MB in the beginning and 960.5 MB in the end (delta: 855.6 MB). Free memory was 69.4 MB in the beginning and 318.4 MB in the end (delta: -249.0 MB). Peak memory consumption was 762.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:06:48,142 INFO L168 Benchmark]: Witness Printer took 49.34 ms. Allocated memory is still 960.5 MB. Free memory was 318.4 MB in the beginning and 316.3 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:06:48,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 66.0 MB in the beginning and 65.9 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.02 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.5 MB in the beginning and 81.0 MB in the end (delta: -31.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 79.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.11 ms. Allocated memory is still 104.9 MB. Free memory was 79.8 MB in the beginning and 78.8 MB in the end (delta: 933.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 292.77 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 69.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 125315.06 ms. Allocated memory was 104.9 MB in the beginning and 960.5 MB in the end (delta: 855.6 MB). Free memory was 69.4 MB in the beginning and 318.4 MB in the end (delta: -249.0 MB). Peak memory consumption was 762.2 MB. Max. memory is 16.1 GB. * Witness Printer took 49.34 ms. Allocated memory is still 960.5 MB. Free memory was 318.4 MB in the beginning and 316.3 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 125.1s, OverallIterations: 60, TraceHistogramMax: 101, PathProgramHistogramMax: 56, EmptinessCheckTime: 0.0s, AutomataDifference: 11.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 501 SDtfs, 1345 SDslu, 6489 SDs, 0 SdLazy, 8165 SolverSat, 4412 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7207 GetRequests, 4930 SyntacticMatches, 7 SemanticMatches, 2270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 46.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=59, InterpolantAutomatonStates: 2352, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 60 MinimizatonAttempts, 2671 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 660 HoareAnnotationTreeSize, 3 FomulaSimplifications, 15405 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 420 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 65.4s InterpolantComputationTime, 10346 NumberOfCodeBlocks, 9986 NumberOfCodeBlocksAsserted, 1129 NumberOfCheckSat, 10230 ConstructedInterpolants, 0 QuantifiedInterpolants, 26595 SizeOfPredicates, 2 NumberOfNonLiveVariables, 12202 ConjunctsInSsa, 1649 ConjunctsInUnsatCore, 116 InterpolantComputations, 4 PerfectInterpolantSequences, 107648/293403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 64 && 64 <= y) && 64 <= x) && x < 65) || (((76 <= y && y <= 76) && x <= 76) && 76 <= x)) || (((58 <= x && y <= 58) && 58 <= y) && x <= 58)) || (((61 <= x && 61 <= y) && x <= 61) && y <= 61)) || (((y <= 89 && 89 <= x) && x <= 89) && 89 <= y)) || (((79 <= y && y <= 79) && x <= 79) && 79 <= x)) || (((y <= 90 && 90 <= x) && 90 <= y) && x <= 90)) || (((52 <= y && 52 <= x) && y <= 52) && x < 53)) || (((83 <= y && 83 <= x) && x <= 83) && y <= 83)) || (((y <= 62 && x <= 62) && 62 <= y) && 62 <= x)) || (((81 <= y && 81 <= x) && x <= 81) && y <= 81)) || (((x <= 82 && y <= 82) && 82 <= x) && 82 <= y)) || (((56 <= y && 56 <= x) && y <= 56) && x < 57)) || (((54 <= x && y <= 54) && 54 <= y) && x <= 54)) || (((x <= 91 && 91 <= x) && 91 <= y) && y <= 91)) || (((71 <= x && y <= 71) && x <= 71) && 71 <= y)) || (((y <= 92 && 92 <= y) && x <= 92) && 92 <= x)) || ((50 <= y && x < 51) && y <= 50)) || (((96 <= x && x <= 96) && y <= 96) && 96 <= y)) || (((97 <= y && x <= 97) && y <= 97) && 97 <= x)) || (((x <= 85 && 85 <= y) && y <= 85) && 85 <= x)) || (((57 <= x && y <= 57) && 57 <= y) && x < 58)) || (((86 <= y && 86 <= x) && y <= 86) && x <= 86)) || (((94 <= y && 94 <= x) && x <= 94) && y <= 94)) || (((74 <= y && y <= 74) && 74 <= x) && x <= 74)) || (((y <= 53 && 53 <= x) && 53 <= y) && x < 54)) || (((y <= 87 && x <= 87) && 87 <= x) && 87 <= y)) || (((60 <= y && x <= 60) && y <= 60) && 60 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || (((y <= 98 && 98 <= y) && 98 <= x) && x <= 98)) || ((100 <= x && y <= 100) && 99 < y)) || (((y <= 88 && 88 <= x) && 88 <= y) && x <= 88)) || (((59 <= y && 59 <= x) && y <= 59) && x <= 59)) || (((y <= 55 && 55 <= y) && x < 56) && 55 <= x)) || (((y <= 70 && 70 <= x) && x <= 70) && 70 <= y)) || (((77 <= y && 77 <= x) && x <= 77) && y <= 77)) || (((73 <= x && x <= 73) && 73 <= y) && y <= 73)) || (((x <= 99 && 99 <= x) && y <= 99) && 99 <= y)) || (((y <= 67 && 67 <= x) && 67 <= y) && x <= 67)) || (((x < 64 && 63 <= y) && y <= 63) && 63 <= x)) || (((x <= 93 && 93 <= y) && y <= 93) && 93 <= x)) || (((y <= 84 && x <= 84) && 84 <= x) && 84 <= y)) || (((y <= 75 && 75 <= x) && x <= 75) && 75 <= y)) || (((68 <= y && 68 <= x) && y <= 68) && x <= 68)) || (((51 <= y && x < 52) && 51 <= x) && y <= 51)) || (((69 <= y && x <= 69) && 69 <= x) && y <= 69)) || (((x <= 80 && y <= 80) && 80 <= y) && 80 <= x)) || (((y <= 95 && 95 <= x) && x <= 95) && 95 <= y)) || (((78 <= y && 78 <= x) && y <= 78) && x <= 78)) || (((y <= 72 && 72 <= y) && x <= 72) && 72 <= x)) || (((66 <= y && 66 <= x) && y <= 66) && x <= 66) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 09:06:48,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fb27a9-ff08-49fc-9b27-90e66f910b4d/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...