./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_3.c --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_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/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_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/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_ba70bcd4-aed7-40a6-bba7-d673eb710042/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 6a30debb45adf4eb2040807436dec0136066a492a6c11eb0dbebd1f179f328d9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 08:37:49,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:37:49,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:37:49,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:37:49,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:37:49,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:37:49,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:37:49,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:37:49,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:37:49,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:37:49,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:37:49,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:37:49,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:37:49,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:37:49,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:37:49,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:37:49,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:37:49,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:37:49,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:37:49,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:37:49,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:37:49,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:37:49,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:37:49,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:37:49,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:37:49,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:37:49,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:37:49,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:37:49,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:37:49,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:37:49,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:37:49,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:37:49,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:37:49,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:37:49,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:37:49,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:37:49,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:37:49,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:37:49,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:37:49,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:37:49,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:37:49,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:37:49,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:37:49,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:37:49,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:37:49,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:37:49,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:37:49,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:37:49,553 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:37:49,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:37:49,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:37:49,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:37:49,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:37:49,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:37:49,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:37:49,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:37:49,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:37:49,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:37:49,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:37:49,556 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:37:49,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:37:49,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:37:49,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:37:49,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:37:49,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:37:49,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:37:49,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:37:49,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:37:49,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:37:49,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:37:49,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:37:49,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:37:49,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:37:49,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:37:49,560 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_ba70bcd4-aed7-40a6-bba7-d673eb710042/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a30debb45adf4eb2040807436dec0136066a492a6c11eb0dbebd1f179f328d9 [2021-10-28 08:37:49,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:37:49,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:37:49,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:37:49,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:37:49,956 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:37:49,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-simple/nested_3.c [2021-10-28 08:37:50,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/data/5d73c423c/7b313d5e75684f4d9f633ea4f9b6c42b/FLAGea7d4407f [2021-10-28 08:37:50,662 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:37:50,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/sv-benchmarks/c/loop-simple/nested_3.c [2021-10-28 08:37:50,687 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/data/5d73c423c/7b313d5e75684f4d9f633ea4f9b6c42b/FLAGea7d4407f [2021-10-28 08:37:51,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/data/5d73c423c/7b313d5e75684f4d9f633ea4f9b6c42b [2021-10-28 08:37:51,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:37:51,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:37:51,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:37:51,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:37:51,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:37:51,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aef81dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51, skipping insertion in model container [2021-10-28 08:37:51,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:37:51,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:37:51,256 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_ba70bcd4-aed7-40a6-bba7-d673eb710042/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-10-28 08:37:51,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:37:51,272 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:37:51,294 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_ba70bcd4-aed7-40a6-bba7-d673eb710042/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-10-28 08:37:51,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:37:51,313 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:37:51,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51 WrapperNode [2021-10-28 08:37:51,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:37:51,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:37:51,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:37:51,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:37:51,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:37:51,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:37:51,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:37:51,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:37:51,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:37:51,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:37:51,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:37:51,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:37:51,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (1/1) ... [2021-10-28 08:37:51,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:37:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:51,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:37:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:37:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:37:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:37:51,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:37:51,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:37:51,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:37:51,779 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 08:37:51,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:37:51 BoogieIcfgContainer [2021-10-28 08:37:51,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:37:51,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:37:51,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:37:51,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:37:51,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:37:51" (1/3) ... [2021-10-28 08:37:51,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b254c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:37:51, skipping insertion in model container [2021-10-28 08:37:51,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:51" (2/3) ... [2021-10-28 08:37:51,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b254c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:37:51, skipping insertion in model container [2021-10-28 08:37:51,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:37:51" (3/3) ... [2021-10-28 08:37:51,809 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2021-10-28 08:37:51,815 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:37:51,815 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:37:51,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:37:51,938 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 08:37:51,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:37:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 08:37:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-28 08:37:51,965 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:51,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-28 08:37:51,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2021-10-28 08:37:51,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:51,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125848628] [2021-10-28 08:37:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:51,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:52,200 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 08:37:52,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125848628] [2021-10-28 08:37:52,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125848628] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:37:52,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:37:52,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:37:52,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104410311] [2021-10-28 08:37:52,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:37:52,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:37:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:37:52,238 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 08:37:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:52,256 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-10-28 08:37:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:37:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-28 08:37:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:52,268 INFO L225 Difference]: With dead ends: 28 [2021-10-28 08:37:52,268 INFO L226 Difference]: Without dead ends: 11 [2021-10-28 08:37:52,272 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 08:37:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-28 08:37:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-28 08:37:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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 08:37:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-28 08:37:52,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2021-10-28 08:37:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:52,310 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-28 08:37:52,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 08:37:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-28 08:37:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-28 08:37:52,312 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:52,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-28 08:37:52,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:37:52,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:52,317 INFO L85 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2021-10-28 08:37:52,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:52,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435231857] [2021-10-28 08:37:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:52,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:52,418 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 08:37:52,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:52,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435231857] [2021-10-28 08:37:52,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435231857] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:37:52,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:37:52,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:37:52,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806473738] [2021-10-28 08:37:52,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:37:52,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:37:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:37:52,425 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 08:37:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:52,456 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-10-28 08:37:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:37:52,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-10-28 08:37:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:52,459 INFO L225 Difference]: With dead ends: 20 [2021-10-28 08:37:52,460 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 08:37:52,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:37:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 08:37:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-10-28 08:37:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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 08:37:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-28 08:37:52,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2021-10-28 08:37:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:52,471 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-28 08:37:52,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 08:37:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-28 08:37:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:37:52,473 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:52,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:52,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:37:52,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 269702254, now seen corresponding path program 1 times [2021-10-28 08:37:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:52,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798383230] [2021-10-28 08:37:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:52,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:52,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:52,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798383230] [2021-10-28 08:37:52,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798383230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:37:52,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:37:52,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:37:52,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440069525] [2021-10-28 08:37:52,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:37:52,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:37:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:37:52,571 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 08:37:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:52,587 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-28 08:37:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:37:52,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 08:37:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:52,589 INFO L225 Difference]: With dead ends: 25 [2021-10-28 08:37:52,589 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 08:37:52,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:37:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 08:37:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-28 08:37:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 08:37:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-28 08:37:52,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-10-28 08:37:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:52,595 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-28 08:37:52,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 08:37:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-28 08:37:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:37:52,596 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:52,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:52,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:37:52,597 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash 904437762, now seen corresponding path program 1 times [2021-10-28 08:37:52,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:52,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342196897] [2021-10-28 08:37:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:52,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:52,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:52,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342196897] [2021-10-28 08:37:52,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342196897] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:37:52,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:37:52,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:37:52,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800856097] [2021-10-28 08:37:52,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:37:52,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:37:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:37:52,642 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 08:37:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:52,654 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-10-28 08:37:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:37:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2021-10-28 08:37:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:52,656 INFO L225 Difference]: With dead ends: 25 [2021-10-28 08:37:52,656 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 08:37:52,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:37:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 08:37:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-28 08:37:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 08:37:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-28 08:37:52,661 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-10-28 08:37:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:52,661 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 08:37:52,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 08:37:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-28 08:37:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:37:52,662 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:52,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:52,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:37:52,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164800, now seen corresponding path program 1 times [2021-10-28 08:37:52,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:52,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97522352] [2021-10-28 08:37:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:52,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:52,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:52,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97522352] [2021-10-28 08:37:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97522352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:52,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878220852] [2021-10-28 08:37:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:52,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:52,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:52,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:37:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:37:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:52,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878220852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:52,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:52,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 08:37:52,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948686965] [2021-10-28 08:37:52,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:37:52,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:52,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:37:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:37:52,886 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 08:37:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:52,907 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-10-28 08:37:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:37:52,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) Word has length 13 [2021-10-28 08:37:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:52,909 INFO L225 Difference]: With dead ends: 28 [2021-10-28 08:37:52,909 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 08:37:52,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 08:37:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 08:37:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-28 08:37:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 08:37:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-28 08:37:52,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-10-28 08:37:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:52,915 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-28 08:37:52,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 08:37:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-28 08:37:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:37:52,916 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:52,916 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:52,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:53,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:53,133 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:53,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -253582594, now seen corresponding path program 2 times [2021-10-28 08:37:53,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:53,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753995857] [2021-10-28 08:37:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:53,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:37:53,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:53,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753995857] [2021-10-28 08:37:53,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753995857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:53,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643394151] [2021-10-28 08:37:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:37:53,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:53,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:53,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:37:53,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:37:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:37:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:53,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643394151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:53,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:53,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-28 08:37:53,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989051087] [2021-10-28 08:37:53,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:37:53,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:37:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:37:53,335 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 08:37:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:53,485 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-10-28 08:37:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:37:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 15 [2021-10-28 08:37:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:53,487 INFO L225 Difference]: With dead ends: 51 [2021-10-28 08:37:53,487 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 08:37:53,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:37:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 08:37:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-10-28 08:37:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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 08:37:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-10-28 08:37:53,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2021-10-28 08:37:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:53,515 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-10-28 08:37:53,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 08:37:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-10-28 08:37:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:37:53,517 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:53,517 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:53,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:53,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:53,718 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:53,719 INFO L85 PathProgramCache]: Analyzing trace with hash -311567314, now seen corresponding path program 3 times [2021-10-28 08:37:53,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:53,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813750609] [2021-10-28 08:37:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:53,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 08:37:53,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:53,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813750609] [2021-10-28 08:37:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813750609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:53,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261567226] [2021-10-28 08:37:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:37:53,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:53,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:53,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:37:53,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:37:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:37:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-28 08:37:53,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261567226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:53,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:53,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 08:37:53,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914869865] [2021-10-28 08:37:53,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:37:53,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:37:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:37:53,989 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 08:37:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:54,014 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-10-28 08:37:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:37:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2021-10-28 08:37:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:54,017 INFO L225 Difference]: With dead ends: 71 [2021-10-28 08:37:54,017 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 08:37:54,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 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 08:37:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 08:37:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2021-10-28 08:37:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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 08:37:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-28 08:37:54,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2021-10-28 08:37:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:54,030 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-28 08:37:54,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 08:37:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-28 08:37:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:37:54,033 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:54,033 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:54,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:54,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:54,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -936285786, now seen corresponding path program 4 times [2021-10-28 08:37:54,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:54,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881107033] [2021-10-28 08:37:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:54,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 08:37:54,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:54,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881107033] [2021-10-28 08:37:54,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881107033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:54,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506848933] [2021-10-28 08:37:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:37:54,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:54,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:54,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:37:54,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:37:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:37:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 08:37:54,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506848933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:54,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:54,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 08:37:54,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172153514] [2021-10-28 08:37:54,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:37:54,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:54,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:37:54,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:37:54,568 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 08:37:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:54,596 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-10-28 08:37:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:37:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 47 [2021-10-28 08:37:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:54,598 INFO L225 Difference]: With dead ends: 97 [2021-10-28 08:37:54,598 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 08:37:54,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 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 08:37:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 08:37:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-10-28 08:37:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 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 08:37:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-10-28 08:37:54,610 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2021-10-28 08:37:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:54,610 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-10-28 08:37:54,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 08:37:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-10-28 08:37:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 08:37:54,613 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:54,613 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:54,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:54,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:54,841 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1097513562, now seen corresponding path program 5 times [2021-10-28 08:37:54,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:54,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879013999] [2021-10-28 08:37:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:54,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-10-28 08:37:54,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:54,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879013999] [2021-10-28 08:37:54,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879013999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:54,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100463918] [2021-10-28 08:37:54,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:37:54,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:54,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:54,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:37:55,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 08:37:55,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:37:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 218 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-10-28 08:37:55,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100463918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:55,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:55,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 08:37:55,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952456987] [2021-10-28 08:37:55,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:37:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:37:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:37:55,320 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 08:37:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:55,370 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2021-10-28 08:37:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:37:55,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 55 [2021-10-28 08:37:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:55,374 INFO L225 Difference]: With dead ends: 111 [2021-10-28 08:37:55,374 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 08:37:55,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:37:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 08:37:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-10-28 08:37:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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 08:37:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-10-28 08:37:55,390 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 55 [2021-10-28 08:37:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:55,390 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-10-28 08:37:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 08:37:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-10-28 08:37:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 08:37:55,400 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:55,400 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:55,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:55,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 08:37:55,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:55,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1691369894, now seen corresponding path program 6 times [2021-10-28 08:37:55,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:55,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45325956] [2021-10-28 08:37:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:55,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 190 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-10-28 08:37:55,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:55,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45325956] [2021-10-28 08:37:55,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45325956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:55,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035735906] [2021-10-28 08:37:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:37:55,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:55,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:55,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:37:55,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-10-28 08:37:55,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:37:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 318 proven. 25 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-10-28 08:37:56,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035735906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:56,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:56,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 08:37:56,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81513420] [2021-10-28 08:37:56,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:37:56,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:37:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:37:56,039 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 08:37:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:56,078 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-10-28 08:37:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:37:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 63 [2021-10-28 08:37:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:56,083 INFO L225 Difference]: With dead ends: 121 [2021-10-28 08:37:56,083 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 08:37:56,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 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 08:37:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 08:37:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 08:37:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 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 08:37:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-10-28 08:37:56,105 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 63 [2021-10-28 08:37:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:56,105 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-10-28 08:37:56,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 08:37:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-10-28 08:37:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 08:37:56,109 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:56,109 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:56,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-28 08:37:56,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:37:56,310 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1900076454, now seen corresponding path program 7 times [2021-10-28 08:37:56,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:56,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543653728] [2021-10-28 08:37:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:56,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-10-28 08:37:56,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:56,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543653728] [2021-10-28 08:37:56,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543653728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:56,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847349377] [2021-10-28 08:37:56,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:37:56,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:56,388 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:56,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:37:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:37:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-10-28 08:37:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847349377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:56,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:56,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 08:37:56,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095385184] [2021-10-28 08:37:56,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:37:56,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:37:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:37:56,736 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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 08:37:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:56,762 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-10-28 08:37:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:37:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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 71 [2021-10-28 08:37:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:56,766 INFO L225 Difference]: With dead ends: 168 [2021-10-28 08:37:56,766 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 08:37:56,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 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 08:37:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 08:37:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-10-28 08:37:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 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 08:37:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-28 08:37:56,784 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 71 [2021-10-28 08:37:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:56,785 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-28 08:37:56,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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 08:37:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-28 08:37:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 08:37:56,796 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:56,796 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:56,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:57,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:57,001 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1075796806, now seen corresponding path program 8 times [2021-10-28 08:37:57,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:57,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981422788] [2021-10-28 08:37:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:57,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-10-28 08:37:57,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:57,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981422788] [2021-10-28 08:37:57,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981422788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:57,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659173858] [2021-10-28 08:37:57,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:37:57,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:57,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:57,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:57,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:37:57,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:37:57,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:37:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-10-28 08:37:57,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659173858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:57,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:57,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 08:37:57,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941431203] [2021-10-28 08:37:57,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:37:57,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:37:57,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:37:57,586 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 08:37:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:57,633 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2021-10-28 08:37:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:37:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 101 [2021-10-28 08:37:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:57,637 INFO L225 Difference]: With dead ends: 213 [2021-10-28 08:37:57,637 INFO L226 Difference]: Without dead ends: 160 [2021-10-28 08:37:57,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 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 08:37:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-28 08:37:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2021-10-28 08:37:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.083969465648855) internal successors, (142), 131 states have internal predecessors, (142), 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 08:37:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2021-10-28 08:37:57,671 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 101 [2021-10-28 08:37:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:57,674 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2021-10-28 08:37:57,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 08:37:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2021-10-28 08:37:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-28 08:37:57,680 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:57,680 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:57,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:57,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 08:37:57,880 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash -538489946, now seen corresponding path program 9 times [2021-10-28 08:37:57,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:57,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557149961] [2021-10-28 08:37:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:57,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1403 proven. 526 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2021-10-28 08:37:57,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:57,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557149961] [2021-10-28 08:37:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557149961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:57,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731445165] [2021-10-28 08:37:57,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:37:57,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:57,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:57,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:58,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:37:58,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-10-28 08:37:58,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:37:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1404 proven. 526 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-10-28 08:37:58,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731445165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:58,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:58,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 08:37:58,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625645864] [2021-10-28 08:37:58,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:37:58,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:37:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:37:58,591 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 08:37:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:58,631 INFO L93 Difference]: Finished difference Result 258 states and 279 transitions. [2021-10-28 08:37:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:37:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 131 [2021-10-28 08:37:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:58,633 INFO L225 Difference]: With dead ends: 258 [2021-10-28 08:37:58,634 INFO L226 Difference]: Without dead ends: 190 [2021-10-28 08:37:58,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:37:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-28 08:37:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 162. [2021-10-28 08:37:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0807453416149069) internal successors, (174), 161 states have internal predecessors, (174), 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 08:37:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2021-10-28 08:37:58,645 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 131 [2021-10-28 08:37:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:58,646 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2021-10-28 08:37:58,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 08:37:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2021-10-28 08:37:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-28 08:37:58,648 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:58,648 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:58,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:58,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:58,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1069707590, now seen corresponding path program 10 times [2021-10-28 08:37:58,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:58,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579557235] [2021-10-28 08:37:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:58,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-10-28 08:37:59,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:59,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579557235] [2021-10-28 08:37:59,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579557235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:59,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639181910] [2021-10-28 08:37:59,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:37:59,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:59,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:59,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:37:59,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:37:59,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:37:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:37:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-10-28 08:37:59,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639181910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:59,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:59,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 08:37:59,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580816651] [2021-10-28 08:37:59,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:37:59,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:37:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:37:59,692 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 08:37:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:59,745 INFO L93 Difference]: Finished difference Result 275 states and 297 transitions. [2021-10-28 08:37:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:37:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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) Word has length 161 [2021-10-28 08:37:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:59,748 INFO L225 Difference]: With dead ends: 275 [2021-10-28 08:37:59,749 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 08:37:59,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 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 08:37:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 08:37:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-10-28 08:37:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0785340314136125) internal successors, (206), 191 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 08:37:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 206 transitions. [2021-10-28 08:37:59,765 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 206 transitions. Word has length 161 [2021-10-28 08:37:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:59,767 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 206 transitions. [2021-10-28 08:37:59,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 08:37:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 206 transitions. [2021-10-28 08:37:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-28 08:37:59,770 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:59,770 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 08:37:59,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:59,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 08:37:59,997 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:59,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1969636954, now seen corresponding path program 11 times [2021-10-28 08:37:59,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:59,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892115414] [2021-10-28 08:37:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:59,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:38:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2021-10-28 08:38:00,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:38:00,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892115414] [2021-10-28 08:38:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892115414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:00,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800590692] [2021-10-28 08:38:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:38:00,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:38:00,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:38:00,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:38:00,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2021-10-28 08:38:00,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:38:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:38:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2021-10-28 08:38:01,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800590692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:01,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:38:01,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 08:38:01,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103308924] [2021-10-28 08:38:01,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:38:01,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:38:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:38:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:38:01,114 INFO L87 Difference]: Start difference. First operand 192 states and 206 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 08:38:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:38:01,149 INFO L93 Difference]: Finished difference Result 380 states and 408 transitions. [2021-10-28 08:38:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:38:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 191 [2021-10-28 08:38:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:38:01,153 INFO L225 Difference]: With dead ends: 380 [2021-10-28 08:38:01,153 INFO L226 Difference]: Without dead ends: 377 [2021-10-28 08:38:01,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 191 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 08:38:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-28 08:38:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 285. [2021-10-28 08:38:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0774647887323943) internal successors, (306), 284 states have internal predecessors, (306), 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 08:38:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2021-10-28 08:38:01,182 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 191 [2021-10-28 08:38:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:38:01,183 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2021-10-28 08:38:01,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 08:38:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2021-10-28 08:38:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-10-28 08:38:01,188 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:38:01,188 INFO L513 BasicCegarLoop]: trace histogram [108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-28 08:38:01,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:38:01,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:38:01,402 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:38:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:38:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash -148194194, now seen corresponding path program 12 times [2021-10-28 08:38:01,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:38:01,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609015344] [2021-10-28 08:38:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:38:01,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:38:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2021-10-28 08:38:01,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:38:01,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609015344] [2021-10-28 08:38:01,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609015344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:01,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347506741] [2021-10-28 08:38:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:38:01,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:38:01,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:38:01,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:38:02,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-10-28 08:38:02,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:38:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:38:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2021-10-28 08:38:03,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347506741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:03,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:38:03,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 08:38:03,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449994317] [2021-10-28 08:38:03,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:38:03,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:38:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:38:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:38:03,114 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 08:38:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:38:03,162 INFO L93 Difference]: Finished difference Result 473 states and 508 transitions. [2021-10-28 08:38:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:38:03,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 284 [2021-10-28 08:38:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:38:03,166 INFO L225 Difference]: With dead ends: 473 [2021-10-28 08:38:03,166 INFO L226 Difference]: Without dead ends: 470 [2021-10-28 08:38:03,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 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 08:38:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-10-28 08:38:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 378. [2021-10-28 08:38:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0769230769230769) internal successors, (406), 377 states have internal predecessors, (406), 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 08:38:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 406 transitions. [2021-10-28 08:38:03,195 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 406 transitions. Word has length 284 [2021-10-28 08:38:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:38:03,195 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 406 transitions. [2021-10-28 08:38:03,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 08:38:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 406 transitions. [2021-10-28 08:38:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-10-28 08:38:03,202 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:38:03,203 INFO L513 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-28 08:38:03,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:38:03,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:38:03,425 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:38:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:38:03,426 INFO L85 PathProgramCache]: Analyzing trace with hash 382291622, now seen corresponding path program 13 times [2021-10-28 08:38:03,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:38:03,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465829524] [2021-10-28 08:38:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:38:03,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:38:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2021-10-28 08:38:03,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:38:03,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465829524] [2021-10-28 08:38:03,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465829524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:03,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939850677] [2021-10-28 08:38:03,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:38:03,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:03,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:38:03,623 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:38:03,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:38:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:38:04,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2021-10-28 08:38:05,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939850677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:05,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:38:05,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 08:38:05,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053045343] [2021-10-28 08:38:05,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:38:05,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:38:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:38:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:38:05,298 INFO L87 Difference]: Start difference. First operand 378 states and 406 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 08:38:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:38:05,351 INFO L93 Difference]: Finished difference Result 566 states and 608 transitions. [2021-10-28 08:38:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:38:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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) Word has length 377 [2021-10-28 08:38:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:38:05,356 INFO L225 Difference]: With dead ends: 566 [2021-10-28 08:38:05,356 INFO L226 Difference]: Without dead ends: 563 [2021-10-28 08:38:05,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:38:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-10-28 08:38:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 471. [2021-10-28 08:38:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.0765957446808512) internal successors, (506), 470 states have internal predecessors, (506), 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 08:38:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 506 transitions. [2021-10-28 08:38:05,394 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 506 transitions. Word has length 377 [2021-10-28 08:38:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:38:05,395 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 506 transitions. [2021-10-28 08:38:05,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 08:38:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 506 transitions. [2021-10-28 08:38:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-10-28 08:38:05,404 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:38:05,404 INFO L513 BasicCegarLoop]: trace histogram [180, 180, 30, 30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2021-10-28 08:38:05,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:38:05,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:38:05,629 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:38:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:38:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1130841966, now seen corresponding path program 14 times [2021-10-28 08:38:05,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:38:05,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024949906] [2021-10-28 08:38:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:38:05,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:38:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2021-10-28 08:38:05,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:38:05,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024949906] [2021-10-28 08:38:05,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024949906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:05,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542323511] [2021-10-28 08:38:05,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:38:05,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:05,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:38:05,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:38:05,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:38:06,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:38:06,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:38:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:38:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2021-10-28 08:38:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542323511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:07,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:38:07,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 08:38:07,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171014969] [2021-10-28 08:38:07,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:38:07,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:38:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:38:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:38:07,949 INFO L87 Difference]: Start difference. First operand 471 states and 506 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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 08:38:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:38:08,023 INFO L93 Difference]: Finished difference Result 567 states and 609 transitions. [2021-10-28 08:38:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:38:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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 470 [2021-10-28 08:38:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:38:08,027 INFO L225 Difference]: With dead ends: 567 [2021-10-28 08:38:08,028 INFO L226 Difference]: Without dead ends: 564 [2021-10-28 08:38:08,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 470 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 08:38:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-10-28 08:38:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-10-28 08:38:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.0763765541740675) internal successors, (606), 563 states have internal predecessors, (606), 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 08:38:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 606 transitions. [2021-10-28 08:38:08,067 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 606 transitions. Word has length 470 [2021-10-28 08:38:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:38:08,068 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 606 transitions. [2021-10-28 08:38:08,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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 08:38:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 606 transitions. [2021-10-28 08:38:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2021-10-28 08:38:08,082 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:38:08,083 INFO L513 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-28 08:38:08,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:38:08,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:38:08,309 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:38:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:38:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1072389210, now seen corresponding path program 15 times [2021-10-28 08:38:08,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:38:08,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402418939] [2021-10-28 08:38:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:38:08,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:38:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 0 proven. 48558 refuted. 0 times theorem prover too weak. 7815 trivial. 0 not checked. [2021-10-28 08:38:09,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:38:09,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402418939] [2021-10-28 08:38:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402418939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:09,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118535450] [2021-10-28 08:38:09,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:38:09,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:09,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:38:09,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:38:09,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:38:09,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-10-28 08:38:09,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:38:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:38:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 15747 proven. 1311 refuted. 0 times theorem prover too weak. 39315 trivial. 0 not checked. [2021-10-28 08:38:11,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118535450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:11,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:38:11,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 34 [2021-10-28 08:38:11,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943206385] [2021-10-28 08:38:11,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 08:38:11,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:38:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 08:38:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 08:38:11,645 INFO L87 Difference]: Start difference. First operand 564 states and 606 transitions. Second operand has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 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 08:38:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:38:19,059 INFO L93 Difference]: Finished difference Result 1047 states and 1127 transitions. [2021-10-28 08:38:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2021-10-28 08:38:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 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) Word has length 563 [2021-10-28 08:38:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:38:19,064 INFO L225 Difference]: With dead ends: 1047 [2021-10-28 08:38:19,064 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:38:19,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 553 SyntacticMatches, 3 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44277 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7654, Invalid=96998, Unknown=0, NotChecked=0, Total=104652 [2021-10-28 08:38:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:38:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:38:19,107 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 08:38:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:38:19,107 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 563 [2021-10-28 08:38:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:38:19,108 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:38:19,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 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 08:38:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:38:19,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:38:19,111 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:38:19,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:38:19,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:19,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 08:38:19,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:38:19,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:38:19,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:38:22,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:38:25,248 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 08:38:25,248 INFO L860 garLoopResultBuilder]: At program point L31(lines 15 32) the Hoare annotation is: true [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (let ((.cse1 (<= ULTIMATE.start_main_~c~0 6)) (.cse0 (<= ULTIMATE.start_main_~a~0 5))) (or (and (= ULTIMATE.start_main_~b~0 5) .cse0 (< ULTIMATE.start_main_~c~0 7)) (and (= ULTIMATE.start_main_~b~0 4) .cse1 .cse0) (and (= ULTIMATE.start_main_~b~0 2) .cse1 .cse0) (and (= ULTIMATE.start_main_~b~0 0) .cse1 .cse0) (and .cse1 .cse0 (= ULTIMATE.start_main_~b~0 3)) (and .cse1 (= ULTIMATE.start_main_~b~0 1) .cse0))) [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L853 garLoopResultBuilder]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (< 5 ULTIMATE.start_main_~b~0) (<= ULTIMATE.start_main_~b~0 6) (<= ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~c~0)) [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 08:38:25,249 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2021-10-28 08:38:25,250 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2021-10-28 08:38:25,250 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2021-10-28 08:38:25,250 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 26) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~c~0 6)) (.cse1 (<= ULTIMATE.start_main_~a~0 5)) (.cse2 (< 5 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 3)) (and (= ULTIMATE.start_main_~b~0 5) (<= 6 ULTIMATE.start_main_~c~0) .cse1 (< ULTIMATE.start_main_~c~0 7)) (and (= ULTIMATE.start_main_~b~0 2) .cse0 .cse1 .cse2) (and (< 5 ULTIMATE.start_main_~b~0) (<= ULTIMATE.start_main_~b~0 6) .cse0 .cse1 .cse2) (and .cse0 (= ULTIMATE.start_main_~b~0 1) .cse1 .cse2) (and (= ULTIMATE.start_main_~b~0 0) .cse0 .cse1 .cse2) (and (= ULTIMATE.start_main_~b~0 4) .cse0 .cse1 .cse2))) [2021-10-28 08:38:25,253 INFO L731 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1] [2021-10-28 08:38:25,254 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:38:25,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:38:25 BoogieIcfgContainer [2021-10-28 08:38:25,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:38:25,271 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:38:25,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:38:25,271 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:38:25,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:37:51" (3/4) ... [2021-10-28 08:38:25,275 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:38:25,284 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 08:38:25,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:38:25,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:38:25,285 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:38:25,314 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:38:25,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:38:25,315 INFO L168 Benchmark]: Toolchain (without parser) took 34301.24 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 73.6 MB in the beginning and 248.5 MB in the end (delta: -174.9 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:38:25,316 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 82.6 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:38:25,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.13 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 84.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:38:25,316 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.99 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 82.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:38:25,317 INFO L168 Benchmark]: Boogie Preprocessor took 47.41 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 82.0 MB in the end (delta: 534.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:38:25,317 INFO L168 Benchmark]: RCFGBuilder took 374.69 ms. Allocated memory is still 109.1 MB. Free memory was 81.5 MB in the beginning and 72.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:38:25,318 INFO L168 Benchmark]: TraceAbstraction took 33473.74 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 72.0 MB in the beginning and 250.6 MB in the end (delta: -178.6 MB). Peak memory consumption was 220.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:38:25,318 INFO L168 Benchmark]: Witness Printer took 43.02 ms. Allocated memory is still 339.7 MB. Free memory was 250.6 MB in the beginning and 248.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:38:25,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 82.6 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.13 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 84.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.99 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 82.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.41 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 82.0 MB in the end (delta: 534.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 374.69 ms. Allocated memory is still 109.1 MB. Free memory was 81.5 MB in the beginning and 72.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33473.74 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 72.0 MB in the beginning and 250.6 MB in the end (delta: -178.6 MB). Peak memory consumption was 220.3 MB. Max. memory is 16.1 GB. * Witness Printer took 43.02 ms. Allocated memory is still 339.7 MB. Free memory was 250.6 MB in the beginning and 248.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. 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: 29]: 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, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.3s, OverallIterations: 19, TraceHistogramMax: 216, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 835 SDslu, 355 SDs, 0 SdLazy, 808 SolverSat, 564 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2974 GetRequests, 2567 SyntacticMatches, 3 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44353 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred in iteration=18, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 409 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 173 HoareAnnotationTreeSize, 4 FomulaSimplifications, 81170 FormulaSimplificationTreeSizeReduction, 2.9s HoareSimplificationTime, 4 FomulaSimplificationsInter, 5785 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 5165 NumberOfCodeBlocks, 4619 NumberOfCodeBlocksAsserted, 293 NumberOfCheckSat, 5131 ConstructedInterpolants, 0 QuantifiedInterpolants, 13643 SizeOfPredicates, 3 NumberOfNonLiveVariables, 3678 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 122731/302125 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: 21]: Loop Invariant Derived loop invariant: (((5 < b && b <= 6) && a <= 6) && c <= 6) && 5 < c - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((b == 5 && a <= 5) && c < 7) || ((b == 4 && c <= 6) && a <= 5)) || ((b == 2 && c <= 6) && a <= 5)) || ((b == 0 && c <= 6) && a <= 5)) || ((c <= 6 && a <= 5) && b == 3)) || ((c <= 6 && b == 1) && a <= 5) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((c <= 6 && a <= 5) && 5 < c) && b == 3) || (((b == 5 && 6 <= c) && a <= 5) && c < 7)) || (((b == 2 && c <= 6) && a <= 5) && 5 < c)) || ((((5 < b && b <= 6) && c <= 6) && a <= 5) && 5 < c)) || (((c <= 6 && b == 1) && a <= 5) && 5 < c)) || (((b == 0 && c <= 6) && a <= 5) && 5 < c)) || (((b == 4 && c <= 6) && a <= 5) && 5 < c) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 08:38:25,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba70bcd4-aed7-40a6-bba7-d673eb710042/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...