./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/half_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY --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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:36:01,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:36:01,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:36:01,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:36:01,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:36:01,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:36:01,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:36:01,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:36:01,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:36:01,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:36:01,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:36:01,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:36:01,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:36:01,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:36:01,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:36:01,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:36:01,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:36:01,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:36:01,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:36:01,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:36:01,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:36:01,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:36:01,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:36:01,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:36:01,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:36:01,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:36:01,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:36:01,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:36:01,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:36:01,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:36:01,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:36:01,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:36:01,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:36:01,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:36:01,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:36:01,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:36:01,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:36:01,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:36:01,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:36:01,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:36:01,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:36:01,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:36:01,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:36:01,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:36:01,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:36:01,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:36:01,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:36:01,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:36:01,462 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:36:01,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:36:01,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:36:01,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:36:01,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:36:01,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:36:01,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:36:01,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:36:01,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:36:01,464 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:36:01,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:36:01,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:36:01,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:36:01,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:36:01,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:36:01,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:36:01,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:36:01,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:36:01,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:36:01,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:36:01,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:36:01,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:36:01,467 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:36:01,467 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:36:01,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:36:01,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:36:01,468 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_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2021-11-07 07:36:01,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:36:01,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:36:01,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:36:01,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:36:01,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:36:01,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-invgen/half_2.i [2021-11-07 07:36:01,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/data/cc7592aeb/84b15d2feb4944cf81572e7d9024af23/FLAG3d2924145 [2021-11-07 07:36:02,474 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:36:02,474 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/sv-benchmarks/c/loop-invgen/half_2.i [2021-11-07 07:36:02,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/data/cc7592aeb/84b15d2feb4944cf81572e7d9024af23/FLAG3d2924145 [2021-11-07 07:36:02,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/data/cc7592aeb/84b15d2feb4944cf81572e7d9024af23 [2021-11-07 07:36:02,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:36:02,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:36:02,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:36:02,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:36:02,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:36:02,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:36:02" (1/1) ... [2021-11-07 07:36:02,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aabca2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:02, skipping insertion in model container [2021-11-07 07:36:02,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:36:02" (1/1) ... [2021-11-07 07:36:02,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:36:03,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:36:03,216 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_b189a107-ee51-40ae-a184-bc39962e5e71/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2021-11-07 07:36:03,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:36:03,239 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:36:03,255 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_b189a107-ee51-40ae-a184-bc39962e5e71/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2021-11-07 07:36:03,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:36:03,275 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:36:03,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03 WrapperNode [2021-11-07 07:36:03,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:36:03,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:36:03,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:36:03,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:36:03,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:36:03,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:36:03,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:36:03,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:36:03,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:36:03,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:36:03,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:36:03,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:36:03,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (1/1) ... [2021-11-07 07:36:03,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:36:03,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:03,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:36:03,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:36:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:36:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:36:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:36:03,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:36:03,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:36:03,790 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 07:36:03,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:36:03 BoogieIcfgContainer [2021-11-07 07:36:03,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:36:03,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:36:03,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:36:03,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:36:03,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:36:02" (1/3) ... [2021-11-07 07:36:03,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cb3778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:36:03, skipping insertion in model container [2021-11-07 07:36:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:03" (2/3) ... [2021-11-07 07:36:03,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cb3778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:36:03, skipping insertion in model container [2021-11-07 07:36:03,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:36:03" (3/3) ... [2021-11-07 07:36:03,809 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.i [2021-11-07 07:36:03,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:36:03,820 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:36:03,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:36:03,900 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 [2021-11-07 07:36:03,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:36:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:36:03,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:03,930 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:03,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2021-11-07 07:36:03,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:03,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295874491] [2021-11-07 07:36:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:03,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:04,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:04,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295874491] [2021-11-07 07:36:04,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295874491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:04,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:04,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:36:04,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843608208] [2021-11-07 07:36:04,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:36:04,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:36:04,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:36:04,221 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 4.0) internal successors, (8), 2 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) [2021-11-07 07:36:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:04,241 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-11-07 07:36:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:36:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2021-11-07 07:36:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:04,257 INFO L225 Difference]: With dead ends: 24 [2021-11-07 07:36:04,257 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 07:36:04,260 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 [2021-11-07 07:36:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 07:36:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-07 07:36:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-07 07:36:04,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-11-07 07:36:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:04,297 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-07 07:36:04,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-11-07 07:36:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-07 07:36:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:36:04,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:04,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:04,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:36:04,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2021-11-07 07:36:04,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:04,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805377898] [2021-11-07 07:36:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:04,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:04,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:04,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805377898] [2021-11-07 07:36:04,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805377898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:36:04,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:36:04,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:36:04,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860910411] [2021-11-07 07:36:04,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:36:04,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:04,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:36:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:36:04,429 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-07 07:36:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:04,473 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-07 07:36:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:36:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2021-11-07 07:36:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:04,475 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:36:04,475 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 07:36:04,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:36:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 07:36:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 07:36:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-07 07:36:04,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-07 07:36:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:04,480 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-07 07:36:04,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-07 07:36:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-07 07:36:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:36:04,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:04,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:04,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:36:04,482 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:04,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2021-11-07 07:36:04,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:04,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615634223] [2021-11-07 07:36:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:04,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:04,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:04,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615634223] [2021-11-07 07:36:04,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615634223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:04,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038523593] [2021-11-07 07:36:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:04,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:04,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:04,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:04,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:36:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:36:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:05,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038523593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:05,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:05,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 07:36:05,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208934623] [2021-11-07 07:36:05,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:36:05,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:36:05,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:36:05,123 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2021-11-07 07:36:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:05,222 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-07 07:36:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:36:05,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 07:36:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:05,225 INFO L225 Difference]: With dead ends: 20 [2021-11-07 07:36:05,225 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 07:36:05,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:36:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 07:36:05,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-07 07:36:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-07 07:36:05,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-11-07 07:36:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:05,232 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-07 07:36:05,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2021-11-07 07:36:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-07 07:36:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:36:05,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:05,233 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:05,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:05,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:05,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -15345099, now seen corresponding path program 2 times [2021-11-07 07:36:05,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:05,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219303035] [2021-11-07 07:36:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:05,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:05,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:05,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219303035] [2021-11-07 07:36:05,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219303035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:05,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713546366] [2021-11-07 07:36:05,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:36:05,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:05,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:05,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:05,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:36:05,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:36:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:36:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:05,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713546366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:05,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:05,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-07 07:36:05,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698387093] [2021-11-07 07:36:05,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:36:05,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:36:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:36:05,799 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-11-07 07:36:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:05,922 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-07 07:36:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:36:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 07:36:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:05,926 INFO L225 Difference]: With dead ends: 25 [2021-11-07 07:36:05,926 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 07:36:05,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:36:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 07:36:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-11-07 07:36:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-07 07:36:05,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-11-07 07:36:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:05,945 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-07 07:36:05,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-11-07 07:36:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-07 07:36:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:36:05,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:05,947 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:05,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:06,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:06,169 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 3 times [2021-11-07 07:36:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:06,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910194001] [2021-11-07 07:36:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:06,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:06,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910194001] [2021-11-07 07:36:06,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910194001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229382280] [2021-11-07 07:36:06,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:36:06,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:06,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:06,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:06,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:36:06,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 07:36:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:36:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:06,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229382280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:06,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:06,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-07 07:36:06,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203957133] [2021-11-07 07:36:06,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:36:06,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:36:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:36:06,543 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:06,725 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-07 07:36:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:36:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 07:36:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:06,727 INFO L225 Difference]: With dead ends: 27 [2021-11-07 07:36:06,728 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:36:06,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:36:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:36:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 13. [2021-11-07 07:36:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-07 07:36:06,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-07 07:36:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:06,734 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-07 07:36:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-07 07:36:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:36:06,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:06,736 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:06,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:06,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:06,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash 242948241, now seen corresponding path program 1 times [2021-11-07 07:36:06,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:06,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000857346] [2021-11-07 07:36:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:06,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:07,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:07,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000857346] [2021-11-07 07:36:07,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000857346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:07,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353750012] [2021-11-07 07:36:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:07,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:07,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:07,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:07,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:36:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:36:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:07,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353750012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:07,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:07,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-07 07:36:07,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588651742] [2021-11-07 07:36:07,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:36:07,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:36:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:36:07,445 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:07,521 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-07 07:36:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:36:07,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:36:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:07,522 INFO L225 Difference]: With dead ends: 24 [2021-11-07 07:36:07,522 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 07:36:07,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:36:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 07:36:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 07:36:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-11-07 07:36:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-07 07:36:07,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-11-07 07:36:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:07,527 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-07 07:36:07,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-07 07:36:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:36:07,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:07,528 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:07,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:07,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:36:07,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 2 times [2021-11-07 07:36:07,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:07,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067053288] [2021-11-07 07:36:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:07,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:07,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:07,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067053288] [2021-11-07 07:36:07,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067053288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:07,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99711677] [2021-11-07 07:36:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:36:07,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:07,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:07,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:36:08,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:36:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:36:08,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:08,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99711677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:08,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:08,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-11-07 07:36:08,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917163089] [2021-11-07 07:36:08,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:36:08,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:36:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:36:08,318 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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) [2021-11-07 07:36:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:08,501 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-07 07:36:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:36:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 13 [2021-11-07 07:36:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:08,502 INFO L225 Difference]: With dead ends: 27 [2021-11-07 07:36:08,502 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 07:36:08,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:36:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 07:36:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 07:36:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 07:36:08,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-11-07 07:36:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:08,507 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 07:36:08,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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) [2021-11-07 07:36:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 07:36:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:36:08,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:08,510 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:08,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:08,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:08,711 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1204539281, now seen corresponding path program 3 times [2021-11-07 07:36:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:08,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376054079] [2021-11-07 07:36:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:08,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:08,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:08,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376054079] [2021-11-07 07:36:08,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376054079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:08,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876047779] [2021-11-07 07:36:08,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:36:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:08,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:08,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:36:08,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 07:36:08,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:36:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:09,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876047779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:09,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:09,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-07 07:36:09,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80503541] [2021-11-07 07:36:09,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:36:09,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:36:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:36:09,050 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:09,141 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-07 07:36:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:36:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 07:36:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:09,143 INFO L225 Difference]: With dead ends: 22 [2021-11-07 07:36:09,143 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 07:36:09,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:36:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 07:36:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-07 07:36:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-07 07:36:09,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-11-07 07:36:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-07 07:36:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-07 07:36:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:36:09,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:09,157 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:09,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:09,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:09,373 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:09,373 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 4 times [2021-11-07 07:36:09,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:09,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386892179] [2021-11-07 07:36:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:09,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:09,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:09,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386892179] [2021-11-07 07:36:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386892179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:09,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952170479] [2021-11-07 07:36:09,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:36:09,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:09,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:09,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:36:09,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:36:09,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:36:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:09,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952170479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:09,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:09,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-11-07 07:36:09,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684890651] [2021-11-07 07:36:09,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:36:09,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:36:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:36:09,960 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:10,154 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-07 07:36:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:36:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 17 [2021-11-07 07:36:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:10,156 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:36:10,156 INFO L226 Difference]: Without dead ends: 19 [2021-11-07 07:36:10,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:36:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-07 07:36:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-07 07:36:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-07 07:36:10,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-11-07 07:36:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:10,162 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-07 07:36:10,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-07 07:36:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:36:10,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:10,163 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:10,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:10,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 07:36:10,385 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash 972400821, now seen corresponding path program 5 times [2021-11-07 07:36:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:10,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915784957] [2021-11-07 07:36:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:10,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:10,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:10,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915784957] [2021-11-07 07:36:10,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915784957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:10,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226599180] [2021-11-07 07:36:10,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:36:10,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:10,509 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:10,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:36:10,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 07:36:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:36:10,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:10,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226599180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:10,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:10,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-07 07:36:10,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106492050] [2021-11-07 07:36:10,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:36:10,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:36:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:36:10,778 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-11-07 07:36:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:10,947 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-07 07:36:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:36:10,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 18 [2021-11-07 07:36:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:10,948 INFO L225 Difference]: With dead ends: 26 [2021-11-07 07:36:10,949 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:36:10,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:36:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:36:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-07 07:36:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-07 07:36:10,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-11-07 07:36:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:10,955 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-07 07:36:10,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-11-07 07:36:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-07 07:36:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 07:36:10,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:10,957 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:11,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:11,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:36:11,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 6 times [2021-11-07 07:36:11,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:11,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478966381] [2021-11-07 07:36:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:11,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:11,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:11,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478966381] [2021-11-07 07:36:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478966381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:11,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610356341] [2021-11-07 07:36:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:36:11,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:11,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:11,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:36:11,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 07:36:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:36:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610356341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:12,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:12,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-11-07 07:36:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239460735] [2021-11-07 07:36:12,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:36:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:36:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:36:12,034 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:12,377 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-07 07:36:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:36:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 07:36:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:12,378 INFO L225 Difference]: With dead ends: 41 [2021-11-07 07:36:12,378 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 07:36:12,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:36:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 07:36:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-07 07:36:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-07 07:36:12,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2021-11-07 07:36:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:12,383 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-07 07:36:12,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-07 07:36:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:36:12,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:12,384 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:12,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:12,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:36:12,597 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1894361361, now seen corresponding path program 7 times [2021-11-07 07:36:12,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:12,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405787559] [2021-11-07 07:36:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:12,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:12,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:12,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405787559] [2021-11-07 07:36:12,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405787559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:12,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960558481] [2021-11-07 07:36:12,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:36:12,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:12,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:12,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:36:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:36:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960558481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:13,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:13,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-11-07 07:36:13,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759460461] [2021-11-07 07:36:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:36:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:36:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:36:13,092 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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) [2021-11-07 07:36:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:13,287 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-07 07:36:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:36:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22 [2021-11-07 07:36:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:13,288 INFO L225 Difference]: With dead ends: 30 [2021-11-07 07:36:13,288 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 07:36:13,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:36:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 07:36:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-11-07 07:36:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-07 07:36:13,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-11-07 07:36:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:13,294 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-07 07:36:13,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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) [2021-11-07 07:36:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-07 07:36:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:36:13,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:13,299 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:13,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:13,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:36:13,521 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 8 times [2021-11-07 07:36:13,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:13,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486912323] [2021-11-07 07:36:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:13,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:13,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:13,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486912323] [2021-11-07 07:36:13,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486912323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:13,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728380687] [2021-11-07 07:36:13,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:36:13,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:13,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:13,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:36:14,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:36:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:36:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:14,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728380687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:14,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:14,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-11-07 07:36:14,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033297395] [2021-11-07 07:36:14,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:36:14,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:36:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:36:14,418 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:14,708 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-11-07 07:36:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:36:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 07:36:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:14,709 INFO L225 Difference]: With dead ends: 48 [2021-11-07 07:36:14,709 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 07:36:14,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:36:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 07:36:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 07:36:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-07 07:36:14,715 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2021-11-07 07:36:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:14,715 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-07 07:36:14,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-07 07:36:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:36:14,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:14,717 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:14,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:14,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:36:14,937 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1892051147, now seen corresponding path program 9 times [2021-11-07 07:36:14,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:14,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873820681] [2021-11-07 07:36:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:14,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:15,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:15,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873820681] [2021-11-07 07:36:15,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873820681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:15,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459545977] [2021-11-07 07:36:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:36:15,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:15,096 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:15,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:36:15,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 07:36:15,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:15,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:36:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:15,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459545977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:15,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:15,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-11-07 07:36:15,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093889075] [2021-11-07 07:36:15,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:36:15,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:15,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:36:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:36:15,527 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:15,781 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-07 07:36:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:36:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:36:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:15,782 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:36:15,782 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 07:36:15,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:36:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 07:36:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-11-07 07:36:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-11-07 07:36:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-07 07:36:15,790 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2021-11-07 07:36:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:15,790 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-07 07:36:15,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-07 07:36:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:36:15,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:15,791 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:15,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:16,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:36:16,005 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 10 times [2021-11-07 07:36:16,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:16,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478078941] [2021-11-07 07:36:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:16,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:16,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:16,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478078941] [2021-11-07 07:36:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478078941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:16,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018380374] [2021-11-07 07:36:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:36:16,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:16,449 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:16,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:36:16,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:36:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:36:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:17,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018380374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:17,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:17,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-11-07 07:36:17,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168116840] [2021-11-07 07:36:17,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:36:17,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:36:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:36:17,130 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:17,553 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-11-07 07:36:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:36:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 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 29 [2021-11-07 07:36:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:17,554 INFO L225 Difference]: With dead ends: 55 [2021-11-07 07:36:17,554 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:36:17,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:36:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:36:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 07:36:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2021-11-07 07:36:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-07 07:36:17,562 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2021-11-07 07:36:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:17,563 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-07 07:36:17,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-07 07:36:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:36:17,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:17,564 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:17,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:17,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:17,782 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1576493713, now seen corresponding path program 11 times [2021-11-07 07:36:17,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:17,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122205870] [2021-11-07 07:36:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:17,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:18,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:18,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122205870] [2021-11-07 07:36:18,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122205870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:18,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147117748] [2021-11-07 07:36:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:36:18,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:18,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:18,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:18,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:36:18,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:36:18,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:36:18,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:18,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147117748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:18,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:18,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-11-07 07:36:18,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205202061] [2021-11-07 07:36:18,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:36:18,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:36:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:36:18,551 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:18,806 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-07 07:36:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:36:18,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 07:36:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:18,823 INFO L225 Difference]: With dead ends: 38 [2021-11-07 07:36:18,823 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:36:18,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:36:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:36:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-11-07 07:36:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-07 07:36:18,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2021-11-07 07:36:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:18,834 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-07 07:36:18,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-07 07:36:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:36:18,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:18,835 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:18,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:19,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:36:19,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 12 times [2021-11-07 07:36:19,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:19,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676634139] [2021-11-07 07:36:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:19,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:19,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:19,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676634139] [2021-11-07 07:36:19,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676634139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:19,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998450033] [2021-11-07 07:36:19,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:36:19,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:19,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:19,585 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:19,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:36:19,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:36:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:36:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:20,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998450033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:20,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:20,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-11-07 07:36:20,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175770978] [2021-11-07 07:36:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:36:20,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:36:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:36:20,667 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:21,223 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-07 07:36:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:36:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 07:36:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:21,224 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:36:21,224 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 07:36:21,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=2289, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:36:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 07:36:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-07 07:36:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2021-11-07 07:36:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-07 07:36:21,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2021-11-07 07:36:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:21,237 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-07 07:36:21,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-07 07:36:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:36:21,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:21,240 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:21,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:21,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:36:21,458 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2109102667, now seen corresponding path program 13 times [2021-11-07 07:36:21,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:21,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837676222] [2021-11-07 07:36:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:21,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:21,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:21,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837676222] [2021-11-07 07:36:21,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837676222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:21,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722259320] [2021-11-07 07:36:21,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:36:21,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:21,644 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:21,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:36:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:36:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:22,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722259320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:22,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:22,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-11-07 07:36:22,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862116378] [2021-11-07 07:36:22,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:36:22,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:36:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:36:22,328 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:22,631 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-07 07:36:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:36:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 07:36:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:22,632 INFO L225 Difference]: With dead ends: 42 [2021-11-07 07:36:22,632 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:36:22,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:36:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:36:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-07 07:36:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-07 07:36:22,640 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2021-11-07 07:36:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:22,640 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-07 07:36:22,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-07 07:36:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 07:36:22,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:22,642 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:22,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:22,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:36:22,865 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 14 times [2021-11-07 07:36:22,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:22,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928135133] [2021-11-07 07:36:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:22,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:23,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:23,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928135133] [2021-11-07 07:36:23,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928135133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:23,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501395893] [2021-11-07 07:36:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:36:23,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:23,422 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:23,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:36:23,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:36:23,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:36:23,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:24,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501395893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:24,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:24,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2021-11-07 07:36:24,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95789796] [2021-11-07 07:36:24,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:36:24,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:36:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:36:24,330 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:24,896 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-07 07:36:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:36:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 07:36:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:24,898 INFO L225 Difference]: With dead ends: 69 [2021-11-07 07:36:24,898 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 07:36:24,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:36:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 07:36:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 07:36:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-07 07:36:24,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2021-11-07 07:36:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:24,906 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-07 07:36:24,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-07 07:36:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:36:24,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:24,907 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:24,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:25,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:25,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash 713882641, now seen corresponding path program 15 times [2021-11-07 07:36:25,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:25,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543280427] [2021-11-07 07:36:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:25,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 21 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:25,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:25,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543280427] [2021-11-07 07:36:25,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543280427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:25,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611698556] [2021-11-07 07:36:25,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:36:25,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:25,323 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:25,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:36:25,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 07:36:25,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:36:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611698556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:25,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:25,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-11-07 07:36:25,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823255649] [2021-11-07 07:36:25,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:36:25,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:36:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:36:25,907 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:26,231 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-07 07:36:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:36:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 07:36:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:26,232 INFO L225 Difference]: With dead ends: 46 [2021-11-07 07:36:26,232 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 07:36:26,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:36:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 07:36:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-07 07:36:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-07 07:36:26,242 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2021-11-07 07:36:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:26,242 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-07 07:36:26,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-07 07:36:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:36:26,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:26,243 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:26,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:26,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:26,457 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 16 times [2021-11-07 07:36:26,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:26,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031563557] [2021-11-07 07:36:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:26,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:27,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:27,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031563557] [2021-11-07 07:36:27,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031563557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:27,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129527531] [2021-11-07 07:36:27,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:36:27,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:27,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:27,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:27,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:36:27,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:36:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:27,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:36:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129527531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:28,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:28,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 35 [2021-11-07 07:36:28,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387260656] [2021-11-07 07:36:28,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:36:28,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:36:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:36:28,148 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:28,867 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-07 07:36:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:36:28,868 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 07:36:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:28,868 INFO L225 Difference]: With dead ends: 76 [2021-11-07 07:36:28,869 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 07:36:28,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:36:28,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 07:36:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 07:36:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-07 07:36:28,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2021-11-07 07:36:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:28,914 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-07 07:36:28,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-07 07:36:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:36:28,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:28,916 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:28,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:29,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:36:29,117 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1754125365, now seen corresponding path program 17 times [2021-11-07 07:36:29,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:29,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727699753] [2021-11-07 07:36:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:29,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:29,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:29,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727699753] [2021-11-07 07:36:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727699753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:29,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530328680] [2021-11-07 07:36:29,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:36:29,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:29,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:29,408 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:29,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:36:29,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:36:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:36:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:30,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530328680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:30,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:30,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2021-11-07 07:36:30,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893033049] [2021-11-07 07:36:30,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:36:30,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:36:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:36:30,156 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:30,607 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-07 07:36:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:36:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 07:36:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:30,613 INFO L225 Difference]: With dead ends: 50 [2021-11-07 07:36:30,613 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:36:30,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=2115, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:36:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:36:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-11-07 07:36:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-07 07:36:30,626 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2021-11-07 07:36:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:30,626 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-07 07:36:30,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-07 07:36:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 07:36:30,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:30,627 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:30,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:30,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:30,828 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 18 times [2021-11-07 07:36:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:30,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158599334] [2021-11-07 07:36:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:30,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:31,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:31,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158599334] [2021-11-07 07:36:31,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158599334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:31,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914921361] [2021-11-07 07:36:31,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:36:31,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:31,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:31,530 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:31,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:36:31,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-07 07:36:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:36:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:33,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914921361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:33,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:33,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2021-11-07 07:36:33,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27597343] [2021-11-07 07:36:33,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:36:33,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:33,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:36:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:36:33,006 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:34,012 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-11-07 07:36:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:36:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 07:36:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:34,013 INFO L225 Difference]: With dead ends: 83 [2021-11-07 07:36:34,014 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 07:36:34,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=432, Invalid=4260, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:36:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 07:36:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-07 07:36:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-07 07:36:34,025 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2021-11-07 07:36:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:34,025 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-07 07:36:34,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-07 07:36:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:36:34,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:34,027 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:34,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:34,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:34,233 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -532515439, now seen corresponding path program 19 times [2021-11-07 07:36:34,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:34,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990894560] [2021-11-07 07:36:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:34,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:34,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:34,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990894560] [2021-11-07 07:36:34,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990894560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:34,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621726118] [2021-11-07 07:36:34,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:36:34,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:34,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:34,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:36:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:36:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621726118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:35,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2021-11-07 07:36:35,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642707321] [2021-11-07 07:36:35,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:36:35,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:36:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:36:35,265 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:35,696 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-07 07:36:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:36:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 07:36:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:35,697 INFO L225 Difference]: With dead ends: 54 [2021-11-07 07:36:35,697 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 07:36:35,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=2558, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:36:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 07:36:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-11-07 07:36:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-07 07:36:35,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2021-11-07 07:36:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:35,705 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-07 07:36:35,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-07 07:36:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:36:35,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:35,706 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:35,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 07:36:35,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:35,921 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 20 times [2021-11-07 07:36:35,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:35,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167985898] [2021-11-07 07:36:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:35,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:36,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:36,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167985898] [2021-11-07 07:36:36,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167985898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:36,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654830070] [2021-11-07 07:36:36,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:36:36,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:36,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:36,775 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:36,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:36:37,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:36:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:36:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:38,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654830070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:38,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:38,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 41 [2021-11-07 07:36:38,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430264775] [2021-11-07 07:36:38,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:36:38,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:38,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:36:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:36:38,023 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:38,882 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-11-07 07:36:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:36:38,883 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 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 49 [2021-11-07 07:36:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:38,883 INFO L225 Difference]: With dead ends: 90 [2021-11-07 07:36:38,883 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 07:36:38,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:36:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 07:36:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-07 07:36:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-07 07:36:38,891 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2021-11-07 07:36:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-07 07:36:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-07 07:36:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:36:38,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:38,892 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:38,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:39,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:36:39,093 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -378658123, now seen corresponding path program 21 times [2021-11-07 07:36:39,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:39,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047421431] [2021-11-07 07:36:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:39,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 45 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:39,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:39,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047421431] [2021-11-07 07:36:39,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047421431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:39,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529079202] [2021-11-07 07:36:39,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:36:39,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:39,457 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:39,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:36:39,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:36:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:36:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:40,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529079202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:40,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:40,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2021-11-07 07:36:40,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490553608] [2021-11-07 07:36:40,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:36:40,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:36:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:36:40,426 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:40,972 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-07 07:36:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:36:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 07:36:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:40,974 INFO L225 Difference]: With dead ends: 58 [2021-11-07 07:36:40,974 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:36:40,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=3043, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:36:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:36:40,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-07 07:36:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-07 07:36:40,985 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2021-11-07 07:36:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:40,985 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-07 07:36:40,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-07 07:36:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:36:40,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:40,986 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:41,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:41,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:36:41,187 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 22 times [2021-11-07 07:36:41,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:41,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669377824] [2021-11-07 07:36:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:41,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:42,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:42,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669377824] [2021-11-07 07:36:42,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669377824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:42,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369853056] [2021-11-07 07:36:42,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:36:42,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:42,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:42,070 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:42,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:36:42,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:36:42,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 07:36:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369853056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:43,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:43,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 44 [2021-11-07 07:36:43,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038643567] [2021-11-07 07:36:43,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:36:43,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:36:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:36:43,572 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:44,450 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-11-07 07:36:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:36:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 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 53 [2021-11-07 07:36:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:44,451 INFO L225 Difference]: With dead ends: 97 [2021-11-07 07:36:44,451 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 07:36:44,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=358, Invalid=2834, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:36:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 07:36:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-07 07:36:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-07 07:36:44,458 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2021-11-07 07:36:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:44,459 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-07 07:36:44,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-07 07:36:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:36:44,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:44,460 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:44,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:36:44,665 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -156250351, now seen corresponding path program 23 times [2021-11-07 07:36:44,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:44,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544491800] [2021-11-07 07:36:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:44,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 55 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:45,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:45,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544491800] [2021-11-07 07:36:45,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544491800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:45,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820362815] [2021-11-07 07:36:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:36:45,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:45,029 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:45,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:36:45,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:36:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 07:36:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820362815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2021-11-07 07:36:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467451670] [2021-11-07 07:36:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:36:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:36:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:36:46,334 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 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) [2021-11-07 07:36:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:46,879 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-11-07 07:36:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:36:46,879 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 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) Word has length 54 [2021-11-07 07:36:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:46,880 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:36:46,880 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 07:36:46,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=3570, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:36:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 07:36:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-11-07 07:36:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-07 07:36:46,889 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2021-11-07 07:36:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:46,890 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-07 07:36:46,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 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) [2021-11-07 07:36:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-07 07:36:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 07:36:46,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:46,890 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:46,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:47,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:36:47,091 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 24 times [2021-11-07 07:36:47,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:47,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420115500] [2021-11-07 07:36:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:47,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:48,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:48,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420115500] [2021-11-07 07:36:48,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420115500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:48,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44205843] [2021-11-07 07:36:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:36:48,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:48,056 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:48,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:36:48,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:36:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:36:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:50,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44205843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:50,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:50,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 59 [2021-11-07 07:36:50,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041134688] [2021-11-07 07:36:50,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:36:50,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:36:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:36:50,114 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 59 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:51,449 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2021-11-07 07:36:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:36:51,450 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 07:36:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:51,450 INFO L225 Difference]: With dead ends: 104 [2021-11-07 07:36:51,451 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 07:36:51,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=648, Invalid=6834, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:36:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 07:36:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-07 07:36:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-07 07:36:51,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2021-11-07 07:36:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:51,462 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-07 07:36:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-07 07:36:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:36:51,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:51,463 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:51,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-07 07:36:51,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:36:51,679 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:51,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2119340341, now seen corresponding path program 25 times [2021-11-07 07:36:51,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:51,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543586701] [2021-11-07 07:36:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:51,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 66 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:52,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:52,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543586701] [2021-11-07 07:36:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543586701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:52,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592866243] [2021-11-07 07:36:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:36:52,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:52,125 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:52,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:36:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:52,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:36:52,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:53,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592866243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:53,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:53,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-11-07 07:36:53,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636914365] [2021-11-07 07:36:53,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:36:53,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:36:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:36:53,532 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:54,110 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-11-07 07:36:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:36:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 07:36:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:54,111 INFO L225 Difference]: With dead ends: 66 [2021-11-07 07:36:54,111 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:36:54,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=831, Invalid=4139, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:36:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:36:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-11-07 07:36:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-07 07:36:54,121 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2021-11-07 07:36:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:54,121 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-07 07:36:54,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-07 07:36:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 07:36:54,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:54,122 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:54,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 07:36:54,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:54,337 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 26 times [2021-11-07 07:36:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:54,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962851311] [2021-11-07 07:36:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:54,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:55,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:55,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962851311] [2021-11-07 07:36:55,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962851311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:55,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114421734] [2021-11-07 07:36:55,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:36:55,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:55,564 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:55,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:36:56,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:36:56,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 07:36:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:57,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114421734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:57,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:57,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 50 [2021-11-07 07:36:57,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040305702] [2021-11-07 07:36:57,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:36:57,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:36:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2177, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:36:57,339 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:58,347 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-11-07 07:36:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:36:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 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 61 [2021-11-07 07:36:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:58,348 INFO L225 Difference]: With dead ends: 111 [2021-11-07 07:36:58,348 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 07:36:58,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=455, Invalid=3705, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:36:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 07:36:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-07 07:36:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-07 07:36:58,357 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 61 [2021-11-07 07:36:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:58,357 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-07 07:36:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-07 07:36:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:36:58,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:58,358 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:58,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 07:36:58,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:58,561 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash -747829103, now seen corresponding path program 27 times [2021-11-07 07:36:58,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:58,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803016979] [2021-11-07 07:36:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:58,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 78 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:59,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:59,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803016979] [2021-11-07 07:36:59,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803016979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:59,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808618678] [2021-11-07 07:36:59,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:36:59,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:59,061 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:59,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:36:59,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 07:36:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:36:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:00,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808618678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:00,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:00,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 48 [2021-11-07 07:37:00,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492036085] [2021-11-07 07:37:00,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:37:00,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:37:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:37:00,585 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:01,208 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-07 07:37:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:37:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 07:37:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:01,209 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:37:01,209 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 07:37:01,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=950, Invalid=4750, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:37:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 07:37:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-07 07:37:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-07 07:37:01,222 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2021-11-07 07:37:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:01,223 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-07 07:37:01,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-07 07:37:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:37:01,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:01,223 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:01,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-07 07:37:01,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:01,424 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 28 times [2021-11-07 07:37:01,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:01,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508749850] [2021-11-07 07:37:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:01,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:02,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:02,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508749850] [2021-11-07 07:37:02,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508749850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:02,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372663859] [2021-11-07 07:37:02,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:37:02,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:02,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:02,798 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:02,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:37:03,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:37:03,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:03,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 07:37:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:04,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372663859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:04,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:04,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 53 [2021-11-07 07:37:04,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151368014] [2021-11-07 07:37:04,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 07:37:04,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 07:37:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:37:04,769 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:06,016 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-11-07 07:37:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:37:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 65 [2021-11-07 07:37:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:06,017 INFO L225 Difference]: With dead ends: 118 [2021-11-07 07:37:06,017 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 07:37:06,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=508, Invalid=4184, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:37:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 07:37:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-07 07:37:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-11-07 07:37:06,028 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 65 [2021-11-07 07:37:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:06,028 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-11-07 07:37:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-11-07 07:37:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:37:06,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:06,029 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:06,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 07:37:06,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 07:37:06,237 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash -224190539, now seen corresponding path program 29 times [2021-11-07 07:37:06,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:06,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609450945] [2021-11-07 07:37:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:06,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 91 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:06,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:06,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609450945] [2021-11-07 07:37:06,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609450945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:06,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060215899] [2021-11-07 07:37:06,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:37:06,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:06,678 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:06,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:37:07,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-07 07:37:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:37:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:08,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060215899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:08,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:08,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 51 [2021-11-07 07:37:08,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235091374] [2021-11-07 07:37:08,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:37:08,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:37:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2147, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:37:08,111 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 51 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:08,834 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-11-07 07:37:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:37:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 51 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:37:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:08,835 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:37:08,835 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:37:08,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1077, Invalid=5403, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:37:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:37:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-11-07 07:37:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-07 07:37:08,850 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2021-11-07 07:37:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:08,850 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-07 07:37:08,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 51 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-07 07:37:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:37:08,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:08,851 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:08,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 07:37:09,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 07:37:09,077 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 30 times [2021-11-07 07:37:09,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:09,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040502216] [2021-11-07 07:37:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:09,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:10,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:10,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040502216] [2021-11-07 07:37:10,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040502216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:10,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185774300] [2021-11-07 07:37:10,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:37:10,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:10,236 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:10,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:37:11,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-07 07:37:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:37:11,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:13,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185774300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:13,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:13,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2021-11-07 07:37:13,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299398336] [2021-11-07 07:37:13,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:37:13,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:37:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=4478, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:37:13,253 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 71 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 71 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:14,924 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-11-07 07:37:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:37:14,924 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 71 states have internal predecessors, (135), 0 states have call successors, (0), 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 69 [2021-11-07 07:37:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:14,925 INFO L225 Difference]: With dead ends: 125 [2021-11-07 07:37:14,925 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 07:37:14,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=909, Invalid=10011, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:37:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 07:37:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-07 07:37:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-11-07 07:37:14,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2021-11-07 07:37:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:14,937 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-11-07 07:37:14,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 71 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-11-07 07:37:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:37:14,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:14,937 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:14,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:15,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:37:15,138 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1242702353, now seen corresponding path program 31 times [2021-11-07 07:37:15,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:15,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599780437] [2021-11-07 07:37:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:15,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 105 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:15,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599780437] [2021-11-07 07:37:15,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599780437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977708909] [2021-11-07 07:37:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:37:15,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:15,649 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:15,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:37:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:16,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:37:16,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:17,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977708909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:17,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:17,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2021-11-07 07:37:17,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959665012] [2021-11-07 07:37:17,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:37:17,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:37:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2409, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:37:17,265 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 54 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:18,167 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-11-07 07:37:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:37:18,167 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 54 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:37:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:18,168 INFO L225 Difference]: With dead ends: 78 [2021-11-07 07:37:18,168 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:37:18,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1212, Invalid=6098, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:37:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:37:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-11-07 07:37:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-11-07 07:37:18,186 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2021-11-07 07:37:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:18,186 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-11-07 07:37:18,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 54 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-11-07 07:37:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:37:18,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:18,187 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:18,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:18,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:37:18,389 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 32 times [2021-11-07 07:37:18,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:18,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997117345] [2021-11-07 07:37:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:18,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:19,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:19,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997117345] [2021-11-07 07:37:19,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997117345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:19,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409724893] [2021-11-07 07:37:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:37:19,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:19,706 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:19,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:37:20,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:37:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 07:37:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:22,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409724893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:22,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:22,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 59 [2021-11-07 07:37:22,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682183877] [2021-11-07 07:37:22,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:37:22,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:37:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3044, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:37:22,088 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 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) [2021-11-07 07:37:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:23,486 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2021-11-07 07:37:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:37:23,487 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 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 73 [2021-11-07 07:37:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:23,487 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:37:23,487 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 07:37:23,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=623, Invalid=5229, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:37:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 07:37:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-07 07:37:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-07 07:37:23,500 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 73 [2021-11-07 07:37:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:23,500 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-07 07:37:23,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 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) [2021-11-07 07:37:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-07 07:37:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 07:37:23,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:23,502 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:23,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 07:37:23,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:23,705 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 33 times [2021-11-07 07:37:23,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:23,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575607736] [2021-11-07 07:37:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:23,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 120 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:24,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:24,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575607736] [2021-11-07 07:37:24,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575607736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:24,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302323268] [2021-11-07 07:37:24,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:37:24,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:24,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:24,429 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:24,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:37:25,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-07 07:37:25,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 07:37:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:26,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302323268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:26,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:26,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 57 [2021-11-07 07:37:26,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911254814] [2021-11-07 07:37:26,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 07:37:26,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 07:37:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2686, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:37:26,734 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:27,729 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-11-07 07:37:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:37:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 07:37:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:27,730 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:37:27,730 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 07:37:27,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1355, Invalid=6835, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:37:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 07:37:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-11-07 07:37:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-11-07 07:37:27,744 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2021-11-07 07:37:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:27,744 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-11-07 07:37:27,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-11-07 07:37:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:37:27,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:27,745 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:27,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:27,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:37:27,965 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:27,965 INFO L85 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 34 times [2021-11-07 07:37:27,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:27,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038311175] [2021-11-07 07:37:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:27,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:29,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:29,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038311175] [2021-11-07 07:37:29,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038311175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:29,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045088075] [2021-11-07 07:37:29,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:37:29,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:29,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:29,638 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:29,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:37:30,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:37:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-07 07:37:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:32,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045088075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:32,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:32,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 62 [2021-11-07 07:37:32,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061592630] [2021-11-07 07:37:32,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 07:37:32,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 07:37:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=3365, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:37:32,340 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:34,161 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2021-11-07 07:37:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:37:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 07:37:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:34,162 INFO L225 Difference]: With dead ends: 139 [2021-11-07 07:37:34,163 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 07:37:34,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=685, Invalid=5795, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:37:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 07:37:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 07:37:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-11-07 07:37:34,183 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 77 [2021-11-07 07:37:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:34,183 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-11-07 07:37:34,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-11-07 07:37:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 07:37:34,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:34,185 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:34,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:34,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:37:34,401 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 473373585, now seen corresponding path program 35 times [2021-11-07 07:37:34,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:34,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138074202] [2021-11-07 07:37:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:34,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 136 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:35,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:35,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138074202] [2021-11-07 07:37:35,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138074202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:35,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628164400] [2021-11-07 07:37:35,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:37:35,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:35,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:35,114 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:35,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:37:36,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:37:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:36,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:37:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628164400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:37,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:37,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 60 [2021-11-07 07:37:37,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024495602] [2021-11-07 07:37:37,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 07:37:37,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 07:37:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=2978, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:37:37,230 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:38,309 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-07 07:37:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:37:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 07:37:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:38,310 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:37:38,310 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 07:37:38,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1506, Invalid=7614, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:37:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 07:37:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-11-07 07:37:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-07 07:37:38,324 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2021-11-07 07:37:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:38,324 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-07 07:37:38,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-07 07:37:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 07:37:38,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:38,325 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:38,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:38,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:37:38,526 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 36 times [2021-11-07 07:37:38,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:38,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022953875] [2021-11-07 07:37:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:38,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:40,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:40,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022953875] [2021-11-07 07:37:40,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022953875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:40,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056757642] [2021-11-07 07:37:40,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:37:40,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:40,457 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:40,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:37:41,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:37:41,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 07:37:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056757642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:44,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:44,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 83 [2021-11-07 07:37:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411759432] [2021-11-07 07:37:44,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 07:37:44,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 07:37:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=6140, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:37:44,131 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 83 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:46,310 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-11-07 07:37:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 07:37:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 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 81 [2021-11-07 07:37:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:46,311 INFO L225 Difference]: With dead ends: 146 [2021-11-07 07:37:46,311 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 07:37:46,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1215, Invalid=13791, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:37:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 07:37:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-07 07:37:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-11-07 07:37:46,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 81 [2021-11-07 07:37:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:46,329 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-11-07 07:37:46,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-11-07 07:37:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:37:46,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:46,330 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:46,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-07 07:37:46,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:46,530 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 37 times [2021-11-07 07:37:46,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:46,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522921753] [2021-11-07 07:37:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:46,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:47,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:47,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522921753] [2021-11-07 07:37:47,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522921753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:47,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230734871] [2021-11-07 07:37:47,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:37:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:47,245 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:37:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:48,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 07:37:48,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230734871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:49,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:49,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 63 [2021-11-07 07:37:49,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074197208] [2021-11-07 07:37:49,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:37:49,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:37:49,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=3285, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:37:49,402 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:50,562 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-11-07 07:37:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:37:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 07:37:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:50,564 INFO L225 Difference]: With dead ends: 90 [2021-11-07 07:37:50,564 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:37:50,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1665, Invalid=8435, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:37:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:37:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-11-07 07:37:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-11-07 07:37:50,584 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2021-11-07 07:37:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:50,584 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-11-07 07:37:50,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-11-07 07:37:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 07:37:50,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:50,585 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:50,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-07 07:37:50,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 07:37:50,793 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 38 times [2021-11-07 07:37:50,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:50,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740200211] [2021-11-07 07:37:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:50,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:52,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:52,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740200211] [2021-11-07 07:37:52,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740200211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:52,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110617533] [2021-11-07 07:37:52,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:37:52,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:52,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:52,488 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:52,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:37:53,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:37:53,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-07 07:37:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:55,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110617533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:55,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:55,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 68 [2021-11-07 07:37:55,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064363252] [2021-11-07 07:37:55,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 07:37:55,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 07:37:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=4055, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:37:55,309 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:56,921 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2021-11-07 07:37:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:37:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 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 85 [2021-11-07 07:37:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:56,923 INFO L225 Difference]: With dead ends: 153 [2021-11-07 07:37:56,923 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 07:37:56,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=818, Invalid=7014, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:37:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 07:37:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-07 07:37:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-11-07 07:37:56,938 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2021-11-07 07:37:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:56,938 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-11-07 07:37:56,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-11-07 07:37:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 07:37:56,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:56,940 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:56,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-07 07:37:57,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 07:37:57,145 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2037642513, now seen corresponding path program 39 times [2021-11-07 07:37:57,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:57,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70474773] [2021-11-07 07:37:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:57,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 171 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:58,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:58,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70474773] [2021-11-07 07:37:58,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70474773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:58,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724570141] [2021-11-07 07:37:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:37:58,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:58,007 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:58,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:37:59,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-07 07:37:59,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 07:37:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:00,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724570141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:00,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 66 [2021-11-07 07:38:00,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181512351] [2021-11-07 07:38:00,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:38:00,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:38:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=3607, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:38:00,691 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 66 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) [2021-11-07 07:38:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:01,887 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-11-07 07:38:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:38:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 66 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) Word has length 86 [2021-11-07 07:38:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:01,888 INFO L225 Difference]: With dead ends: 94 [2021-11-07 07:38:01,888 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 07:38:01,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1832, Invalid=9298, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 07:38:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 07:38:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-11-07 07:38:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-07 07:38:01,913 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2021-11-07 07:38:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:01,913 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-07 07:38:01,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 66 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) [2021-11-07 07:38:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-07 07:38:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 07:38:01,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:01,914 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:01,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:02,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:02,129 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 40 times [2021-11-07 07:38:02,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:02,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743272082] [2021-11-07 07:38:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:02,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:04,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:04,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743272082] [2021-11-07 07:38:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743272082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:04,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530613080] [2021-11-07 07:38:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:38:04,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:04,258 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:04,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:38:05,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:38:05,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 07:38:05,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:07,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530613080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:07,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:07,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 71 [2021-11-07 07:38:07,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957675898] [2021-11-07 07:38:07,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:38:07,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:38:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=4424, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:38:07,662 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:09,631 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2021-11-07 07:38:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:38:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 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 89 [2021-11-07 07:38:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:09,633 INFO L225 Difference]: With dead ends: 160 [2021-11-07 07:38:09,633 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 07:38:09,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=889, Invalid=7667, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:38:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 07:38:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-07 07:38:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-11-07 07:38:09,650 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 89 [2021-11-07 07:38:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:09,651 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-11-07 07:38:09,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-11-07 07:38:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:38:09,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:09,652 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:09,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:09,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:09,881 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 41 times [2021-11-07 07:38:09,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:09,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499699892] [2021-11-07 07:38:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:09,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 190 proven. 673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:10,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:10,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499699892] [2021-11-07 07:38:10,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499699892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:10,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542661649] [2021-11-07 07:38:10,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:38:10,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:10,884 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:10,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:38:12,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-07 07:38:12,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:12,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 07:38:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:13,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542661649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:13,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:13,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 69 [2021-11-07 07:38:13,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691823619] [2021-11-07 07:38:13,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 07:38:13,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 07:38:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3944, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:38:13,420 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:14,764 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-11-07 07:38:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:38:14,765 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 07:38:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:14,766 INFO L225 Difference]: With dead ends: 98 [2021-11-07 07:38:14,766 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:38:14,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2007, Invalid=10203, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:38:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:38:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-11-07 07:38:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-11-07 07:38:14,787 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2021-11-07 07:38:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-11-07 07:38:14,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-11-07 07:38:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 07:38:14,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:14,790 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:14,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 07:38:14,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:14,997 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 42 times [2021-11-07 07:38:14,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:14,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12012180] [2021-11-07 07:38:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:14,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:16,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:16,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12012180] [2021-11-07 07:38:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12012180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:16,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998885476] [2021-11-07 07:38:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:38:16,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:16,867 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:16,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:38:18,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-11-07 07:38:18,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:38:18,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:21,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998885476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:21,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:21,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 95 [2021-11-07 07:38:21,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599480347] [2021-11-07 07:38:21,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 07:38:21,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:21,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 07:38:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=8063, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:38:21,936 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 95 states, 95 states have (on average 1.9263157894736842) internal successors, (183), 95 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:24,969 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-11-07 07:38:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:38:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9263157894736842) internal successors, (183), 95 states have internal predecessors, (183), 0 states have call successors, (0), 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 93 [2021-11-07 07:38:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:24,970 INFO L225 Difference]: With dead ends: 167 [2021-11-07 07:38:24,970 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 07:38:24,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3904 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1566, Invalid=18174, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:38:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 07:38:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-07 07:38:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-07 07:38:24,987 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 93 [2021-11-07 07:38:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:24,987 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-07 07:38:24,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9263157894736842) internal successors, (183), 95 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-07 07:38:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:38:24,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:24,988 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:25,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:25,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:38:25,189 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2137042577, now seen corresponding path program 43 times [2021-11-07 07:38:25,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:25,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530720045] [2021-11-07 07:38:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:25,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 210 proven. 738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:25,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:25,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530720045] [2021-11-07 07:38:25,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530720045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:25,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283091969] [2021-11-07 07:38:25,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:38:25,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:25,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:25,979 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:25,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:38:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:38:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:28,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283091969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:28,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:28,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 72 [2021-11-07 07:38:28,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577203551] [2021-11-07 07:38:28,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 07:38:28,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:28,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 07:38:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=4296, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:38:28,580 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 72 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:29,827 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-11-07 07:38:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:38:29,827 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 72 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 07:38:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:29,828 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:38:29,828 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 07:38:29,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2190, Invalid=11150, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:38:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 07:38:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-11-07 07:38:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-11-07 07:38:29,848 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2021-11-07 07:38:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:29,848 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-11-07 07:38:29,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 72 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-11-07 07:38:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 07:38:29,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:29,849 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:29,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:30,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:38:30,063 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 44 times [2021-11-07 07:38:30,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:30,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859739316] [2021-11-07 07:38:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:30,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:32,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:32,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859739316] [2021-11-07 07:38:32,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859739316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:32,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408746475] [2021-11-07 07:38:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:38:32,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:32,156 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:32,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:38:33,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:38:33,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-07 07:38:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:36,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408746475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:36,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:36,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 77 [2021-11-07 07:38:36,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880567969] [2021-11-07 07:38:36,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-07 07:38:36,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-07 07:38:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:38:36,057 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 77 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 77 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:38,614 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2021-11-07 07:38:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:38:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 77 states have internal predecessors, (169), 0 states have call successors, (0), 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 97 [2021-11-07 07:38:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:38,615 INFO L225 Difference]: With dead ends: 174 [2021-11-07 07:38:38,615 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 07:38:38,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1040, Invalid=9060, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:38:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 07:38:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-07 07:38:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-11-07 07:38:38,635 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2021-11-07 07:38:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:38,635 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-11-07 07:38:38,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 77 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-11-07 07:38:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:38:38,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:38,636 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:38,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:38,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:38:38,836 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 45 times [2021-11-07 07:38:38,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:38,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47662465] [2021-11-07 07:38:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:38,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 231 proven. 806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:39,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:39,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47662465] [2021-11-07 07:38:39,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47662465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:39,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621705339] [2021-11-07 07:38:39,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:38:39,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:39,892 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:38:41,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-07 07:38:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-07 07:38:41,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:43,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621705339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:43,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:43,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 75 [2021-11-07 07:38:43,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547002294] [2021-11-07 07:38:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:38:43,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:38:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:38:43,060 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 75 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:44,474 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-11-07 07:38:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:38:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 75 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 07:38:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:44,476 INFO L225 Difference]: With dead ends: 106 [2021-11-07 07:38:44,476 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:38:44,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2381, Invalid=12139, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 07:38:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:38:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2021-11-07 07:38:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-07 07:38:44,507 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2021-11-07 07:38:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:44,508 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-07 07:38:44,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 75 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-07 07:38:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:38:44,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:44,509 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:44,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:44,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:38:44,721 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash -584405303, now seen corresponding path program 46 times [2021-11-07 07:38:44,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:44,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928626122] [2021-11-07 07:38:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:44,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:47,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:47,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928626122] [2021-11-07 07:38:47,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928626122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:47,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550571049] [2021-11-07 07:38:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:38:47,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:47,061 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:47,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:38:48,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:38:48,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:48,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-07 07:38:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:51,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550571049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:51,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:51,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 80 [2021-11-07 07:38:51,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756240606] [2021-11-07 07:38:51,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 07:38:51,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 07:38:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=5627, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:38:51,006 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 80 states, 80 states have (on average 2.2) internal successors, (176), 80 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:53,409 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2021-11-07 07:38:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:38:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2) internal successors, (176), 80 states have internal predecessors, (176), 0 states have call successors, (0), 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 [2021-11-07 07:38:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:53,411 INFO L225 Difference]: With dead ends: 181 [2021-11-07 07:38:53,411 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 07:38:53,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1120, Invalid=9800, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:38:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 07:38:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-07 07:38:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-07 07:38:53,429 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 101 [2021-11-07 07:38:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:53,430 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-07 07:38:53,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2) internal successors, (176), 80 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-07 07:38:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:38:53,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:53,431 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:53,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:53,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:53,632 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1181399023, now seen corresponding path program 47 times [2021-11-07 07:38:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:53,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899877778] [2021-11-07 07:38:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:53,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 253 proven. 877 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:54,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:54,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899877778] [2021-11-07 07:38:54,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899877778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:54,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807031707] [2021-11-07 07:38:54,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:38:54,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:54,758 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:54,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:38:56,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:38:56,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 07:38:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:58,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807031707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:58,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:58,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 78 [2021-11-07 07:38:58,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436220825] [2021-11-07 07:38:58,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 07:38:58,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 07:38:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=961, Invalid=5045, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:38:58,430 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 78 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:59,927 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2021-11-07 07:38:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:38:59,928 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 78 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 07:38:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:59,928 INFO L225 Difference]: With dead ends: 110 [2021-11-07 07:38:59,928 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 07:38:59,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2580, Invalid=13170, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:38:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 07:38:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-11-07 07:38:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-11-07 07:38:59,956 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 102 [2021-11-07 07:38:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-11-07 07:38:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 78 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-11-07 07:38:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 07:38:59,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:59,957 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:59,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 07:39:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-07 07:39:00,158 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2091445523, now seen corresponding path program 48 times [2021-11-07 07:39:00,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:00,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271966234] [2021-11-07 07:39:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:00,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:02,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:02,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271966234] [2021-11-07 07:39:02,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271966234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:02,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133357941] [2021-11-07 07:39:02,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:39:02,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:02,628 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:02,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:39:04,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 07:39:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 07:39:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:08,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133357941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:08,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:08,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 107 [2021-11-07 07:39:08,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505801419] [2021-11-07 07:39:08,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 07:39:08,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 07:39:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1095, Invalid=10247, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:39:08,578 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:11,839 INFO L93 Difference]: Finished difference Result 188 states and 191 transitions. [2021-11-07 07:39:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-07 07:39:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 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 105 [2021-11-07 07:39:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:11,840 INFO L225 Difference]: With dead ends: 188 [2021-11-07 07:39:11,840 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 07:39:11,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4999 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1962, Invalid=23160, Unknown=0, NotChecked=0, Total=25122 [2021-11-07 07:39:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 07:39:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 07:39:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-11-07 07:39:11,876 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 105 [2021-11-07 07:39:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:11,877 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-11-07 07:39:11,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-11-07 07:39:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:39:11,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:11,878 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:12,093 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1966880715, now seen corresponding path program 49 times [2021-11-07 07:39:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:12,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870359179] [2021-11-07 07:39:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 276 proven. 951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:13,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:13,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870359179] [2021-11-07 07:39:13,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870359179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:13,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165242063] [2021-11-07 07:39:13,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:39:13,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:13,307 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:13,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:39:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 07:39:15,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:16,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165242063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:16,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:16,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 81 [2021-11-07 07:39:16,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598681547] [2021-11-07 07:39:16,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 07:39:16,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:16,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 07:39:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1038, Invalid=5442, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:39:16,686 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 81 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:18,417 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-11-07 07:39:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:39:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 81 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 07:39:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:18,418 INFO L225 Difference]: With dead ends: 114 [2021-11-07 07:39:18,418 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 07:39:18,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2787, Invalid=14243, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:39:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 07:39:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-11-07 07:39:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-11-07 07:39:18,446 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2021-11-07 07:39:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:18,447 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-11-07 07:39:18,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 81 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-11-07 07:39:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 07:39:18,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:18,447 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:18,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 07:39:18,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:18,648 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 900264009, now seen corresponding path program 50 times [2021-11-07 07:39:18,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:18,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209692225] [2021-11-07 07:39:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:18,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:21,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:21,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209692225] [2021-11-07 07:39:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209692225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:21,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112087235] [2021-11-07 07:39:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:21,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:21,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:21,203 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:39:23,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:23,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-07 07:39:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:26,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112087235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:26,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:26,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 86 [2021-11-07 07:39:26,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116335945] [2021-11-07 07:39:26,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 07:39:26,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 07:39:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=6509, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:39:26,139 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 86 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 86 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:29,072 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2021-11-07 07:39:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:39:29,072 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 86 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-07 07:39:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:29,073 INFO L225 Difference]: With dead ends: 195 [2021-11-07 07:39:29,074 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 07:39:29,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1289, Invalid=11367, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:39:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 07:39:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-07 07:39:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-11-07 07:39:29,095 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 109 [2021-11-07 07:39:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:29,095 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-11-07 07:39:29,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 86 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-11-07 07:39:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 07:39:29,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:29,096 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:29,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-07 07:39:29,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 07:39:29,296 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1582710383, now seen corresponding path program 51 times [2021-11-07 07:39:29,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:29,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365783709] [2021-11-07 07:39:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:29,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 300 proven. 1028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:30,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:30,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365783709] [2021-11-07 07:39:30,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365783709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:30,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042394496] [2021-11-07 07:39:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:39:30,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:30,431 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:30,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:39:32,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-07 07:39:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:39:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 1328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:34,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042394496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:34,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:34,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 84 [2021-11-07 07:39:34,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526858749] [2021-11-07 07:39:34,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 07:39:34,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 07:39:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=5854, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:39:34,090 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:35,900 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-11-07 07:39:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:39:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 07:39:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:35,901 INFO L225 Difference]: With dead ends: 118 [2021-11-07 07:39:35,901 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 07:39:35,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3002, Invalid=15358, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 07:39:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 07:39:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-11-07 07:39:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-11-07 07:39:35,935 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2021-11-07 07:39:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:35,935 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-11-07 07:39:35,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-11-07 07:39:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:39:35,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:35,937 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:35,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-07 07:39:36,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-07 07:39:36,161 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -369219219, now seen corresponding path program 52 times [2021-11-07 07:39:36,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:36,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886880148] [2021-11-07 07:39:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:36,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:39,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:39,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886880148] [2021-11-07 07:39:39,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886880148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:39,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230069507] [2021-11-07 07:39:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:39:39,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:39,111 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:39,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:39:41,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:39:41,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-07 07:39:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:44,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230069507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:44,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 89 [2021-11-07 07:39:44,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186244088] [2021-11-07 07:39:44,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-07 07:39:44,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-07 07:39:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=6974, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:39:44,440 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 89 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:47,655 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2021-11-07 07:39:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 07:39:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 89 states have internal predecessors, (197), 0 states have call successors, (0), 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 113 [2021-11-07 07:39:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:47,656 INFO L225 Difference]: With dead ends: 202 [2021-11-07 07:39:47,656 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 07:39:47,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1378, Invalid=12194, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:39:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 07:39:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-07 07:39:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-11-07 07:39:47,682 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 113 [2021-11-07 07:39:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:47,682 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-11-07 07:39:47,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 89 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-11-07 07:39:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 07:39:47,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:47,684 INFO L513 BasicCegarLoop]: trace histogram [28, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:47,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:47,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:39:47,913 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash -618326347, now seen corresponding path program 53 times [2021-11-07 07:39:47,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:47,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029132952] [2021-11-07 07:39:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:47,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 325 proven. 1108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:49,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:49,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029132952] [2021-11-07 07:39:49,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029132952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:49,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781626064] [2021-11-07 07:39:49,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:39:49,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:49,107 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:49,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:39:51,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-11-07 07:39:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:51,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-07 07:39:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:52,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781626064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:52,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:52,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 87 [2021-11-07 07:39:52,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710722950] [2021-11-07 07:39:52,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:39:52,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:39:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=6281, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:39:52,998 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 87 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:54,824 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-11-07 07:39:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 07:39:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 87 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 07:39:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:54,825 INFO L225 Difference]: With dead ends: 122 [2021-11-07 07:39:54,826 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 07:39:54,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4773 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3225, Invalid=16515, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:39:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 07:39:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2021-11-07 07:39:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-11-07 07:39:54,866 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2021-11-07 07:39:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:54,867 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-11-07 07:39:54,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 87 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-11-07 07:39:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 07:39:54,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:54,868 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:54,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-07 07:39:55,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-07 07:39:55,089 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash 559354313, now seen corresponding path program 54 times [2021-11-07 07:39:55,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:55,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191704059] [2021-11-07 07:39:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:55,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:58,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:58,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191704059] [2021-11-07 07:39:58,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191704059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:58,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109041001] [2021-11-07 07:39:58,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:39:58,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:58,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:58,069 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:58,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:40:00,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-11-07 07:40:00,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 07:40:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:05,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109041001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:05,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:05,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 119 [2021-11-07 07:40:05,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718680657] [2021-11-07 07:40:05,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-07 07:40:05,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-07 07:40:05,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1350, Invalid=12692, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:40:05,732 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 119 states, 119 states have (on average 1.9411764705882353) internal successors, (231), 119 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:10,104 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-11-07 07:40:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 07:40:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9411764705882353) internal successors, (231), 119 states have internal predecessors, (231), 0 states have call successors, (0), 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 117 [2021-11-07 07:40:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:10,106 INFO L225 Difference]: With dead ends: 209 [2021-11-07 07:40:10,106 INFO L226 Difference]: Without dead ends: 119 [2021-11-07 07:40:10,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6229 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2403, Invalid=28749, Unknown=0, NotChecked=0, Total=31152 [2021-11-07 07:40:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-07 07:40:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-07 07:40:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-11-07 07:40:10,145 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 117 [2021-11-07 07:40:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:10,146 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-11-07 07:40:10,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9411764705882353) internal successors, (231), 119 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-11-07 07:40:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 07:40:10,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:10,148 INFO L513 BasicCegarLoop]: trace histogram [29, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:10,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:10,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:10,363 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 523639569, now seen corresponding path program 55 times [2021-11-07 07:40:10,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:10,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091451328] [2021-11-07 07:40:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:10,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 351 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:11,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091451328] [2021-11-07 07:40:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091451328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890223389] [2021-11-07 07:40:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:40:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:11,510 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:11,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:40:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 07:40:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:16,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890223389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:16,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:16,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 90 [2021-11-07 07:40:16,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479149198] [2021-11-07 07:40:16,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 07:40:16,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 07:40:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=6723, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:40:16,072 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 90 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:18,017 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2021-11-07 07:40:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:40:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 90 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 07:40:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:18,019 INFO L225 Difference]: With dead ends: 126 [2021-11-07 07:40:18,019 INFO L226 Difference]: Without dead ends: 124 [2021-11-07 07:40:18,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5132 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3456, Invalid=17714, Unknown=0, NotChecked=0, Total=21170 [2021-11-07 07:40:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-07 07:40:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-07 07:40:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-11-07 07:40:18,043 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 118 [2021-11-07 07:40:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:18,043 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-11-07 07:40:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 90 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-11-07 07:40:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 07:40:18,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:18,044 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:18,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:18,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:18,245 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 430006253, now seen corresponding path program 56 times [2021-11-07 07:40:18,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:18,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848928798] [2021-11-07 07:40:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:18,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:21,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:21,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848928798] [2021-11-07 07:40:21,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848928798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:21,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474872440] [2021-11-07 07:40:21,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:40:21,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:21,255 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:21,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:40:23,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:40:23,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-07 07:40:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474872440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:26,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:26,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 95 [2021-11-07 07:40:26,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473513841] [2021-11-07 07:40:26,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 07:40:26,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 07:40:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=7952, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:40:26,764 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 95 states, 95 states have (on average 2.221052631578947) internal successors, (211), 95 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:30,126 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2021-11-07 07:40:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 07:40:30,127 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.221052631578947) internal successors, (211), 95 states have internal predecessors, (211), 0 states have call successors, (0), 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 121 [2021-11-07 07:40:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:30,128 INFO L225 Difference]: With dead ends: 216 [2021-11-07 07:40:30,128 INFO L226 Difference]: Without dead ends: 123 [2021-11-07 07:40:30,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1565, Invalid=13935, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:40:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-07 07:40:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-07 07:40:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-11-07 07:40:30,155 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 121 [2021-11-07 07:40:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:30,155 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-11-07 07:40:30,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.221052631578947) internal successors, (211), 95 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-11-07 07:40:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 07:40:30,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:30,157 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:30,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-07 07:40:30,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-07 07:40:30,357 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1832221387, now seen corresponding path program 57 times [2021-11-07 07:40:30,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:30,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430612768] [2021-11-07 07:40:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:30,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 378 proven. 1277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:31,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:31,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430612768] [2021-11-07 07:40:31,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430612768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:31,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725140476] [2021-11-07 07:40:31,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:40:31,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:31,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:31,837 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:31,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:40:34,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-11-07 07:40:34,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-07 07:40:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725140476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:36,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:36,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 93 [2021-11-07 07:40:36,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476080552] [2021-11-07 07:40:36,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 07:40:36,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 07:40:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=7180, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:40:36,150 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 93 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:38,092 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-11-07 07:40:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 07:40:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 93 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-07 07:40:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:38,093 INFO L225 Difference]: With dead ends: 130 [2021-11-07 07:40:38,094 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:40:38,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5504 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3695, Invalid=18955, Unknown=0, NotChecked=0, Total=22650 [2021-11-07 07:40:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:40:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-11-07 07:40:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 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) [2021-11-07 07:40:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-11-07 07:40:38,135 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2021-11-07 07:40:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:38,135 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-11-07 07:40:38,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 93 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-11-07 07:40:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 07:40:38,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:38,136 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:38,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:38,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:38,353 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849993, now seen corresponding path program 58 times [2021-11-07 07:40:38,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:38,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929793506] [2021-11-07 07:40:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:38,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:41,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:41,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929793506] [2021-11-07 07:40:41,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929793506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:41,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410472764] [2021-11-07 07:40:41,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:40:41,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:41,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:41,382 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:40:43,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:40:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-07 07:40:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:47,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410472764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:47,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:47,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 98 [2021-11-07 07:40:47,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421668144] [2021-11-07 07:40:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 07:40:47,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 07:40:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=8465, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:40:47,151 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 98 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:50,617 INFO L93 Difference]: Finished difference Result 223 states and 226 transitions. [2021-11-07 07:40:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:40:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 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 125 [2021-11-07 07:40:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:50,620 INFO L225 Difference]: With dead ends: 223 [2021-11-07 07:40:50,620 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 07:40:50,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1663, Invalid=14849, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:40:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 07:40:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-07 07:40:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-11-07 07:40:50,689 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 125 [2021-11-07 07:40:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:50,689 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-11-07 07:40:50,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-11-07 07:40:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 07:40:50,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:50,690 INFO L513 BasicCegarLoop]: trace histogram [31, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:50,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:50,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:50,891 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:50,891 INFO L85 PathProgramCache]: Analyzing trace with hash 131224721, now seen corresponding path program 59 times [2021-11-07 07:40:50,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:50,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692623495] [2021-11-07 07:40:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:50,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 406 proven. 1366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:52,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:52,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692623495] [2021-11-07 07:40:52,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692623495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:52,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498895606] [2021-11-07 07:40:52,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:40:52,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:52,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:52,139 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:52,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:40:54,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 07:40:54,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 07:40:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498895606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:56,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:56,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 96 [2021-11-07 07:40:56,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357584971] [2021-11-07 07:40:56,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 07:40:56,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 07:40:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1468, Invalid=7652, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:40:56,678 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 96 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:58,905 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-11-07 07:40:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:40:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 96 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 07:40:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:58,906 INFO L225 Difference]: With dead ends: 134 [2021-11-07 07:40:58,906 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:40:58,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5889 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3942, Invalid=20238, Unknown=0, NotChecked=0, Total=24180 [2021-11-07 07:40:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:40:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-11-07 07:40:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-11-07 07:40:58,935 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2021-11-07 07:40:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:58,936 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-11-07 07:40:58,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 96 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-11-07 07:40:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 07:40:58,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:58,937 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:58,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-07 07:40:59,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-07 07:40:59,137 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash 900249197, now seen corresponding path program 60 times [2021-11-07 07:40:59,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:59,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590199003] [2021-11-07 07:40:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:59,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:02,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:02,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590199003] [2021-11-07 07:41:02,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590199003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:02,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427645312] [2021-11-07 07:41:02,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:41:02,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:02,606 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:02,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:41:05,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:41:05,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 07:41:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:10,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427645312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:10,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:10,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 131 [2021-11-07 07:41:10,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992351295] [2021-11-07 07:41:10,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 07:41:10,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 07:41:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1632, Invalid=15398, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:41:10,865 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 131 states, 131 states have (on average 1.9465648854961832) internal successors, (255), 131 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:15,203 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2021-11-07 07:41:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 07:41:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9465648854961832) internal successors, (255), 131 states have internal predecessors, (255), 0 states have call successors, (0), 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 129 [2021-11-07 07:41:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:15,204 INFO L225 Difference]: With dead ends: 230 [2021-11-07 07:41:15,204 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 07:41:15,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7594 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2889, Invalid=34941, Unknown=0, NotChecked=0, Total=37830 [2021-11-07 07:41:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 07:41:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-07 07:41:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-11-07 07:41:15,230 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 129 [2021-11-07 07:41:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:15,230 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-11-07 07:41:15,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9465648854961832) internal successors, (255), 131 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-11-07 07:41:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:41:15,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:15,231 INFO L513 BasicCegarLoop]: trace histogram [32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:15,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:15,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-07 07:41:15,446 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash 219943861, now seen corresponding path program 61 times [2021-11-07 07:41:15,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:15,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825942695] [2021-11-07 07:41:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:15,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 435 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:16,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:16,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825942695] [2021-11-07 07:41:16,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825942695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:16,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388297566] [2021-11-07 07:41:16,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:41:16,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:16,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:16,924 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:16,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:41:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 07:41:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:21,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388297566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:21,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:21,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 99 [2021-11-07 07:41:21,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832723898] [2021-11-07 07:41:21,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:41:21,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:21,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:41:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1563, Invalid=8139, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:41:21,597 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 99 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:23,733 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-11-07 07:41:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:41:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 99 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 07:41:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:23,734 INFO L225 Difference]: With dead ends: 138 [2021-11-07 07:41:23,734 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 07:41:23,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6287 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4197, Invalid=21563, Unknown=0, NotChecked=0, Total=25760 [2021-11-07 07:41:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 07:41:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-11-07 07:41:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-11-07 07:41:23,763 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2021-11-07 07:41:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:23,763 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-11-07 07:41:23,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 99 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-11-07 07:41:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 07:41:23,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:23,764 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:23,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-07 07:41:23,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:23,973 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1767705399, now seen corresponding path program 62 times [2021-11-07 07:41:23,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:23,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359796636] [2021-11-07 07:41:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:23,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:27,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:27,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359796636] [2021-11-07 07:41:27,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359796636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:27,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285661730] [2021-11-07 07:41:27,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:41:27,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:27,283 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:27,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:41:30,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:41:30,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:30,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-07 07:41:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285661730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:33,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:33,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 104 [2021-11-07 07:41:33,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711829518] [2021-11-07 07:41:33,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-07 07:41:33,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-07 07:41:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=9539, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:41:33,852 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 104 states, 104 states have (on average 2.230769230769231) internal successors, (232), 104 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:37,692 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2021-11-07 07:41:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 07:41:37,692 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.230769230769231) internal successors, (232), 104 states have internal predecessors, (232), 0 states have call successors, (0), 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 133 [2021-11-07 07:41:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:37,693 INFO L225 Difference]: With dead ends: 237 [2021-11-07 07:41:37,693 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 07:41:37,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1868, Invalid=16764, Unknown=0, NotChecked=0, Total=18632 [2021-11-07 07:41:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 07:41:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-07 07:41:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-11-07 07:41:37,731 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 133 [2021-11-07 07:41:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-11-07 07:41:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.230769230769231) internal successors, (232), 104 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-11-07 07:41:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 07:41:37,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:37,732 INFO L513 BasicCegarLoop]: trace histogram [33, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:37,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:37,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:37,933 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1625919983, now seen corresponding path program 63 times [2021-11-07 07:41:37,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:37,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372792156] [2021-11-07 07:41:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:37,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 465 proven. 1553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:39,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:39,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372792156] [2021-11-07 07:41:39,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372792156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:39,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047352491] [2021-11-07 07:41:39,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:41:39,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:39,353 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:39,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:41:42,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-07 07:41:42,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-07 07:41:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:44,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047352491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:44,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:44,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 102 [2021-11-07 07:41:44,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456308111] [2021-11-07 07:41:44,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 07:41:44,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 07:41:44,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=8641, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:41:44,336 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 102 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:46,533 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2021-11-07 07:41:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 07:41:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 102 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 07:41:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:46,535 INFO L225 Difference]: With dead ends: 142 [2021-11-07 07:41:46,535 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 07:41:46,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6698 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4460, Invalid=22930, Unknown=0, NotChecked=0, Total=27390 [2021-11-07 07:41:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 07:41:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-11-07 07:41:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-11-07 07:41:46,564 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2021-11-07 07:41:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-11-07 07:41:46,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 102 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-11-07 07:41:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 07:41:46,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:46,565 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:46,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:46,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:46,765 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash 863775981, now seen corresponding path program 64 times [2021-11-07 07:41:46,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:46,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995237442] [2021-11-07 07:41:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:46,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1426 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:50,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:50,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995237442] [2021-11-07 07:41:50,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995237442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:50,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606923178] [2021-11-07 07:41:50,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:41:50,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:50,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:50,218 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:50,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:41:53,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:41:53,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-07 07:41:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:56,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606923178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:56,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:56,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 107 [2021-11-07 07:41:56,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800335069] [2021-11-07 07:41:56,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 07:41:56,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:56,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 07:41:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:41:56,870 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 107 states, 107 states have (on average 2.2336448598130842) internal successors, (239), 107 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:00,778 INFO L93 Difference]: Finished difference Result 244 states and 247 transitions. [2021-11-07 07:42:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:42:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2336448598130842) internal successors, (239), 107 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-07 07:42:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:00,780 INFO L225 Difference]: With dead ends: 244 [2021-11-07 07:42:00,780 INFO L226 Difference]: Without dead ends: 139 [2021-11-07 07:42:00,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1975, Invalid=17765, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:42:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-07 07:42:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-07 07:42:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-11-07 07:42:00,808 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 137 [2021-11-07 07:42:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:00,808 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-11-07 07:42:00,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2336448598130842) internal successors, (239), 107 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-11-07 07:42:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 07:42:00,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:00,809 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:00,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:01,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:01,010 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:01,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2004992565, now seen corresponding path program 65 times [2021-11-07 07:42:01,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:01,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797727187] [2021-11-07 07:42:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:01,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 496 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:02,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:02,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797727187] [2021-11-07 07:42:02,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797727187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:02,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440894220] [2021-11-07 07:42:02,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:42:02,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:02,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:02,534 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:02,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:42:05,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-07 07:42:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-07 07:42:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:07,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440894220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:07,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:07,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 105 [2021-11-07 07:42:07,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242176795] [2021-11-07 07:42:07,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 07:42:07,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 07:42:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1762, Invalid=9158, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:42:07,983 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 105 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:10,594 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-11-07 07:42:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:42:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 105 states have internal predecessors, (175), 0 states have call successors, (0), 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 138 [2021-11-07 07:42:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:10,596 INFO L225 Difference]: With dead ends: 146 [2021-11-07 07:42:10,596 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 07:42:10,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7122 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4731, Invalid=24339, Unknown=0, NotChecked=0, Total=29070 [2021-11-07 07:42:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 07:42:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-11-07 07:42:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-11-07 07:42:10,644 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 138 [2021-11-07 07:42:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:10,644 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-11-07 07:42:10,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 105 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-11-07 07:42:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 07:42:10,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:10,645 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:10,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:10,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-07 07:42:10,846 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash 628143689, now seen corresponding path program 66 times [2021-11-07 07:42:10,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:10,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766827398] [2021-11-07 07:42:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:10,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1520 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:15,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:15,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766827398] [2021-11-07 07:42:15,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766827398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:15,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765948447] [2021-11-07 07:42:15,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:42:15,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:15,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:15,221 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:15,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:42:18,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-11-07 07:42:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 07:42:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:24,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765948447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:24,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:24,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 143 [2021-11-07 07:42:24,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813604705] [2021-11-07 07:42:24,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-11-07 07:42:24,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:24,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-11-07 07:42:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1941, Invalid=18365, Unknown=0, NotChecked=0, Total=20306 [2021-11-07 07:42:24,944 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 143 states, 143 states have (on average 1.951048951048951) internal successors, (279), 143 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:30,090 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2021-11-07 07:42:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-07 07:42:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.951048951048951) internal successors, (279), 143 states have internal predecessors, (279), 0 states have call successors, (0), 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 141 [2021-11-07 07:42:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:30,091 INFO L225 Difference]: With dead ends: 251 [2021-11-07 07:42:30,091 INFO L226 Difference]: Without dead ends: 143 [2021-11-07 07:42:30,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9094 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3420, Invalid=41736, Unknown=0, NotChecked=0, Total=45156 [2021-11-07 07:42:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-07 07:42:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-07 07:42:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-11-07 07:42:30,123 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 141 [2021-11-07 07:42:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:30,124 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-11-07 07:42:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.951048951048951) internal successors, (279), 143 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-11-07 07:42:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 07:42:30,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:30,124 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:30,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-07 07:42:30,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:30,325 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash 379217809, now seen corresponding path program 67 times [2021-11-07 07:42:30,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:30,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388680282] [2021-11-07 07:42:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:30,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 528 proven. 1752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:31,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:31,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388680282] [2021-11-07 07:42:31,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388680282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:31,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726667274] [2021-11-07 07:42:31,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:42:31,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:31,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:31,888 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:31,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:42:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 07:42:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726667274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:37,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 108 [2021-11-07 07:42:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434689660] [2021-11-07 07:42:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-07 07:42:37,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-07 07:42:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1866, Invalid=9690, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:42:37,850 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 108 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:40,473 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2021-11-07 07:42:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 07:42:40,473 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 108 states have internal predecessors, (180), 0 states have call successors, (0), 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 142 [2021-11-07 07:42:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:40,474 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:42:40,474 INFO L226 Difference]: Without dead ends: 148 [2021-11-07 07:42:40,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7559 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5010, Invalid=25790, Unknown=0, NotChecked=0, Total=30800 [2021-11-07 07:42:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-07 07:42:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2021-11-07 07:42:40,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-11-07 07:42:40,536 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 142 [2021-11-07 07:42:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:40,536 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-11-07 07:42:40,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 108 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-11-07 07:42:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 07:42:40,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:40,538 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:40,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:40,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:40,754 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1518584685, now seen corresponding path program 68 times [2021-11-07 07:42:40,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:40,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726486273] [2021-11-07 07:42:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:40,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1617 proven. 764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:45,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:45,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726486273] [2021-11-07 07:42:45,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726486273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:45,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183586248] [2021-11-07 07:42:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:42:45,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:45,029 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:45,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:42:48,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:42:48,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-07 07:42:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:52,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183586248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:52,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:52,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 113 [2021-11-07 07:42:52,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54340967] [2021-11-07 07:42:52,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-07 07:42:52,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-07 07:42:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=11270, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:42:52,890 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 113 states, 113 states have (on average 2.2389380530973453) internal successors, (253), 113 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:57,872 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2021-11-07 07:42:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 07:42:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.2389380530973453) internal successors, (253), 113 states have internal predecessors, (253), 0 states have call successors, (0), 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 145 [2021-11-07 07:42:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:57,874 INFO L225 Difference]: With dead ends: 258 [2021-11-07 07:42:57,875 INFO L226 Difference]: Without dead ends: 147 [2021-11-07 07:42:57,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2198, Invalid=19854, Unknown=0, NotChecked=0, Total=22052 [2021-11-07 07:42:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-07 07:42:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-07 07:42:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-11-07 07:42:57,992 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 145 [2021-11-07 07:42:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:57,992 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-11-07 07:42:57,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.2389380530973453) internal successors, (253), 113 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-11-07 07:42:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 07:42:57,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:57,994 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:58,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-07 07:42:58,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:58,219 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1365479605, now seen corresponding path program 69 times [2021-11-07 07:42:58,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:58,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346439733] [2021-11-07 07:42:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:58,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 561 proven. 1856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:00,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:00,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346439733] [2021-11-07 07:43:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346439733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:00,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718285285] [2021-11-07 07:43:00,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:43:00,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:00,152 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:00,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 07:43:03,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-11-07 07:43:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-07 07:43:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:06,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718285285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:06,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:06,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 111 [2021-11-07 07:43:06,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403456065] [2021-11-07 07:43:06,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 07:43:06,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 07:43:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1973, Invalid=10237, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:43:06,436 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:09,405 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-11-07 07:43:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 07:43:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 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 146 [2021-11-07 07:43:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:09,409 INFO L225 Difference]: With dead ends: 154 [2021-11-07 07:43:09,410 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 07:43:09,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8009 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5297, Invalid=27283, Unknown=0, NotChecked=0, Total=32580 [2021-11-07 07:43:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 07:43:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-11-07 07:43:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-11-07 07:43:09,474 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2021-11-07 07:43:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:09,474 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-11-07 07:43:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-11-07 07:43:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:43:09,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:09,476 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:09,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:09,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-07 07:43:09,681 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1372477385, now seen corresponding path program 70 times [2021-11-07 07:43:09,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:09,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618827783] [2021-11-07 07:43:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:09,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1717 proven. 804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:14,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:14,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618827783] [2021-11-07 07:43:14,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618827783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:14,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282912971] [2021-11-07 07:43:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:43:14,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:14,315 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:14,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 07:43:18,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:43:18,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-07 07:43:18,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282912971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:23,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:23,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76] total 116 [2021-11-07 07:43:23,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562600879] [2021-11-07 07:43:23,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-07 07:43:23,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-07 07:43:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=11879, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:43:23,309 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 116 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:28,573 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2021-11-07 07:43:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 07:43:28,573 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:43:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:28,574 INFO L225 Difference]: With dead ends: 265 [2021-11-07 07:43:28,574 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 07:43:28,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2314, Invalid=20942, Unknown=0, NotChecked=0, Total=23256 [2021-11-07 07:43:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 07:43:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-07 07:43:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-11-07 07:43:28,627 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 149 [2021-11-07 07:43:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:28,627 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-11-07 07:43:28,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-11-07 07:43:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 07:43:28,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:28,629 INFO L513 BasicCegarLoop]: trace histogram [37, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:28,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-07 07:43:28,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:28,855 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 234242321, now seen corresponding path program 71 times [2021-11-07 07:43:28,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:28,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405918632] [2021-11-07 07:43:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:28,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 595 proven. 1963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:30,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:30,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405918632] [2021-11-07 07:43:30,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405918632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:30,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848249534] [2021-11-07 07:43:30,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:43:30,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:30,896 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:30,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 07:43:34,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 07:43:34,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:34,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-07 07:43:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848249534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:37,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 114 [2021-11-07 07:43:37,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62811840] [2021-11-07 07:43:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-07 07:43:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-07 07:43:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=10799, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:43:37,825 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 114 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:41,062 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2021-11-07 07:43:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 07:43:41,063 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 114 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 07:43:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:41,064 INFO L225 Difference]: With dead ends: 158 [2021-11-07 07:43:41,064 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 07:43:41,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8472 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5592, Invalid=28818, Unknown=0, NotChecked=0, Total=34410 [2021-11-07 07:43:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 07:43:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-11-07 07:43:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-11-07 07:43:41,102 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 150 [2021-11-07 07:43:41,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:41,103 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-11-07 07:43:41,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 114 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:41,103 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-11-07 07:43:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 07:43:41,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:41,104 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:41,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:41,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:41,304 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:41,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1004045843, now seen corresponding path program 72 times [2021-11-07 07:43:41,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:41,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236425530] [2021-11-07 07:43:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:41,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 1820 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:45,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236425530] [2021-11-07 07:43:45,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236425530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292486905] [2021-11-07 07:43:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:43:45,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:45,657 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 07:43:49,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 07:43:49,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-07 07:43:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:58,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292486905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:58,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:58,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 155 [2021-11-07 07:43:58,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868964240] [2021-11-07 07:43:58,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-11-07 07:43:58,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-11-07 07:43:58,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2277, Invalid=21593, Unknown=0, NotChecked=0, Total=23870 [2021-11-07 07:43:58,214 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 155 states, 155 states have (on average 1.9548387096774194) internal successors, (303), 155 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:05,360 INFO L93 Difference]: Finished difference Result 272 states and 275 transitions. [2021-11-07 07:44:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-07 07:44:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.9548387096774194) internal successors, (303), 155 states have internal predecessors, (303), 0 states have call successors, (0), 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 153 [2021-11-07 07:44:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:05,362 INFO L225 Difference]: With dead ends: 272 [2021-11-07 07:44:05,362 INFO L226 Difference]: Without dead ends: 155 [2021-11-07 07:44:05,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10729 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3996, Invalid=49134, Unknown=0, NotChecked=0, Total=53130 [2021-11-07 07:44:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-07 07:44:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-07 07:44:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-11-07 07:44:05,412 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 153 [2021-11-07 07:44:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:05,412 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-11-07 07:44:05,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.9548387096774194) internal successors, (303), 155 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-11-07 07:44:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 07:44:05,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:05,414 INFO L513 BasicCegarLoop]: trace histogram [38, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:05,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:05,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-07 07:44:05,614 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash -332824779, now seen corresponding path program 73 times [2021-11-07 07:44:05,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:05,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622907755] [2021-11-07 07:44:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:05,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2703 backedges. 630 proven. 2073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:07,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:07,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622907755] [2021-11-07 07:44:07,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622907755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:07,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490937738] [2021-11-07 07:44:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:07,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:07,843 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:07,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 07:44:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-07 07:44:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2703 backedges. 0 proven. 2703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:15,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490937738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:15,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:15,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 117 [2021-11-07 07:44:15,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53674882] [2021-11-07 07:44:15,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-07 07:44:15,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-07 07:44:15,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2196, Invalid=11376, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:44:15,450 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 117 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:18,785 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2021-11-07 07:44:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 07:44:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 117 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-07 07:44:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:18,786 INFO L225 Difference]: With dead ends: 162 [2021-11-07 07:44:18,787 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 07:44:18,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8948 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5895, Invalid=30395, Unknown=0, NotChecked=0, Total=36290 [2021-11-07 07:44:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 07:44:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-11-07 07:44:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2021-11-07 07:44:18,842 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 154 [2021-11-07 07:44:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:18,842 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2021-11-07 07:44:18,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 117 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2021-11-07 07:44:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 07:44:18,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:18,843 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:18,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:19,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-07 07:44:19,044 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1901320521, now seen corresponding path program 74 times [2021-11-07 07:44:19,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:19,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054117719] [2021-11-07 07:44:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:19,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 1926 proven. 887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:23,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:23,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054117719] [2021-11-07 07:44:23,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054117719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:23,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957689540] [2021-11-07 07:44:23,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:23,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:23,795 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:23,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 07:44:28,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:28,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-07 07:44:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:33,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957689540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:33,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:33,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 122 [2021-11-07 07:44:33,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150744862] [2021-11-07 07:44:33,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-07 07:44:33,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:33,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-07 07:44:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1617, Invalid=13145, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:44:33,645 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 122 states, 122 states have (on average 2.2459016393442623) internal successors, (274), 122 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:39,556 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2021-11-07 07:44:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:44:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.2459016393442623) internal successors, (274), 122 states have internal predecessors, (274), 0 states have call successors, (0), 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 157 [2021-11-07 07:44:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:39,557 INFO L225 Difference]: With dead ends: 279 [2021-11-07 07:44:39,557 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 07:44:39,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3348 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2555, Invalid=23205, Unknown=0, NotChecked=0, Total=25760 [2021-11-07 07:44:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 07:44:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-07 07:44:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-11-07 07:44:39,618 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 157 [2021-11-07 07:44:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:39,619 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-11-07 07:44:39,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.2459016393442623) internal successors, (274), 122 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-11-07 07:44:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 07:44:39,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:39,620 INFO L513 BasicCegarLoop]: trace histogram [39, 38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:39,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:39,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-07 07:44:39,845 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash 314702481, now seen corresponding path program 75 times [2021-11-07 07:44:39,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:39,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725797264] [2021-11-07 07:44:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:39,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 666 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:41,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:41,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725797264] [2021-11-07 07:44:41,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725797264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:41,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548351518] [2021-11-07 07:44:41,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:41,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:41,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:41,983 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:41,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 07:44:46,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-11-07 07:44:46,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-07 07:44:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548351518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:49,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 120 [2021-11-07 07:44:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510420023] [2021-11-07 07:44:49,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-07 07:44:49,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-07 07:44:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2312, Invalid=11968, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 07:44:49,198 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 120 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:52,452 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2021-11-07 07:44:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:44:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 120 states have internal predecessors, (200), 0 states have call successors, (0), 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 158 [2021-11-07 07:44:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:52,453 INFO L225 Difference]: With dead ends: 166 [2021-11-07 07:44:52,453 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 07:44:52,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9437 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6206, Invalid=32014, Unknown=0, NotChecked=0, Total=38220 [2021-11-07 07:44:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 07:44:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-11-07 07:44:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-11-07 07:44:52,512 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2021-11-07 07:44:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:52,512 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-11-07 07:44:52,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 120 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-11-07 07:44:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 07:44:52,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:52,513 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:52,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-07 07:44:52,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 07:44:52,729 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash -607170451, now seen corresponding path program 76 times [2021-11-07 07:44:52,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:52,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532394049] [2021-11-07 07:44:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:52,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 2035 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:57,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:57,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532394049] [2021-11-07 07:44:57,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532394049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:57,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900099470] [2021-11-07 07:44:57,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:57,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:57,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:57,951 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:57,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 07:45:02,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:02,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 161 conjunts are in the unsatisfiable core [2021-11-07 07:45:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:07,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900099470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:07,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:07,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82] total 125 [2021-11-07 07:45:07,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287018126] [2021-11-07 07:45:07,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-07 07:45:07,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-07 07:45:07,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1698, Invalid=13802, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:45:07,979 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 125 states, 125 states have (on average 2.248) internal successors, (281), 125 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:14,305 INFO L93 Difference]: Finished difference Result 286 states and 289 transitions. [2021-11-07 07:45:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 07:45:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.248) internal successors, (281), 125 states have internal predecessors, (281), 0 states have call successors, (0), 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 [2021-11-07 07:45:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:14,306 INFO L225 Difference]: With dead ends: 286 [2021-11-07 07:45:14,306 INFO L226 Difference]: Without dead ends: 163 [2021-11-07 07:45:14,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3514 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2680, Invalid=24380, Unknown=0, NotChecked=0, Total=27060 [2021-11-07 07:45:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-07 07:45:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-07 07:45:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-11-07 07:45:14,461 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 161 [2021-11-07 07:45:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:14,461 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-11-07 07:45:14,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.248) internal successors, (281), 125 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-11-07 07:45:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 07:45:14,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:14,463 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:14,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:14,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:14,689 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash -348418635, now seen corresponding path program 77 times [2021-11-07 07:45:14,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:14,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878029371] [2021-11-07 07:45:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:14,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 703 proven. 2302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:17,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:17,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878029371] [2021-11-07 07:45:17,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878029371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:17,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279653718] [2021-11-07 07:45:17,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:17,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:17,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:17,042 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:17,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-07 07:45:21,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2021-11-07 07:45:21,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-07 07:45:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 0 proven. 3005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:25,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279653718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:25,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:25,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 123 [2021-11-07 07:45:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128426665] [2021-11-07 07:45:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 07:45:25,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 07:45:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2431, Invalid=12575, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:45:25,274 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 123 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:29,045 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-11-07 07:45:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 07:45:29,046 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 123 states have internal predecessors, (205), 0 states have call successors, (0), 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 162 [2021-11-07 07:45:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:29,047 INFO L225 Difference]: With dead ends: 170 [2021-11-07 07:45:29,047 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:45:29,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9939 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6525, Invalid=33675, Unknown=0, NotChecked=0, Total=40200 [2021-11-07 07:45:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:45:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2021-11-07 07:45:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-11-07 07:45:29,097 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 162 [2021-11-07 07:45:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:29,097 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-11-07 07:45:29,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 123 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-11-07 07:45:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 07:45:29,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:29,098 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:29,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:29,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:29,299 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1201224393, now seen corresponding path program 78 times [2021-11-07 07:45:29,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:29,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224727260] [2021-11-07 07:45:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:29,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 2147 proven. 974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:34,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:34,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224727260] [2021-11-07 07:45:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224727260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:34,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020990163] [2021-11-07 07:45:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:34,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:34,927 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:34,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-07 07:45:39,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-11-07 07:45:39,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 07:45:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 0 proven. 3121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:50,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020990163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:50,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:50,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 167 [2021-11-07 07:45:50,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198348037] [2021-11-07 07:45:50,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-11-07 07:45:50,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-11-07 07:45:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2640, Invalid=25082, Unknown=0, NotChecked=0, Total=27722 [2021-11-07 07:45:50,081 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 167 states, 167 states have (on average 1.9580838323353293) internal successors, (327), 167 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:58,103 INFO L93 Difference]: Finished difference Result 293 states and 296 transitions. [2021-11-07 07:45:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-07 07:45:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9580838323353293) internal successors, (327), 167 states have internal predecessors, (327), 0 states have call successors, (0), 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 165 [2021-11-07 07:45:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:58,104 INFO L225 Difference]: With dead ends: 293 [2021-11-07 07:45:58,104 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:45:58,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=4617, Invalid=57135, Unknown=0, NotChecked=0, Total=61752 [2021-11-07 07:45:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:45:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-07 07:45:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-11-07 07:45:58,152 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 165 [2021-11-07 07:45:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:58,152 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-11-07 07:45:58,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9580838323353293) internal successors, (327), 167 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-11-07 07:45:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 07:45:58,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:58,153 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:58,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-07 07:45:58,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-11-07 07:45:58,354 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 546673681, now seen corresponding path program 79 times [2021-11-07 07:45:58,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:58,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095770180] [2021-11-07 07:45:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:58,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3162 backedges. 741 proven. 2421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:00,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095770180] [2021-11-07 07:46:00,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095770180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137857522] [2021-11-07 07:46:00,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:46:00,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:00,739 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:00,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 07:46:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 07:46:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3162 backedges. 0 proven. 3162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:09,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137857522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:09,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:09,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 126 [2021-11-07 07:46:09,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659016094] [2021-11-07 07:46:09,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-07 07:46:09,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-07 07:46:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2553, Invalid=13197, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:46:09,288 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 126 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:13,012 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2021-11-07 07:46:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 07:46:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 126 states have internal predecessors, (210), 0 states have call successors, (0), 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 166 [2021-11-07 07:46:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:13,014 INFO L225 Difference]: With dead ends: 174 [2021-11-07 07:46:13,014 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 07:46:13,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10454 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6852, Invalid=35378, Unknown=0, NotChecked=0, Total=42230 [2021-11-07 07:46:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 07:46:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2021-11-07 07:46:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2021-11-07 07:46:13,089 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 166 [2021-11-07 07:46:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:13,090 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2021-11-07 07:46:13,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 126 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2021-11-07 07:46:13,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 07:46:13,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:13,092 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:13,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:13,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:13,309 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash -555530515, now seen corresponding path program 80 times [2021-11-07 07:46:13,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:13,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102296319] [2021-11-07 07:46:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:13,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 2262 proven. 1019 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:19,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:19,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102296319] [2021-11-07 07:46:19,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102296319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:19,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502983904] [2021-11-07 07:46:19,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:46:19,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:19,336 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-07 07:46:24,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:46:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:24,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 169 conjunts are in the unsatisfiable core [2021-11-07 07:46:24,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 0 proven. 3281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:31,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502983904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:31,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 131 [2021-11-07 07:46:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365083978] [2021-11-07 07:46:31,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 07:46:31,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 07:46:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1866, Invalid=15164, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:46:31,123 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 131 states, 131 states have (on average 2.2519083969465647) internal successors, (295), 131 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:38,178 INFO L93 Difference]: Finished difference Result 300 states and 303 transitions. [2021-11-07 07:46:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-07 07:46:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.2519083969465647) internal successors, (295), 131 states have internal predecessors, (295), 0 states have call successors, (0), 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 169 [2021-11-07 07:46:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:38,180 INFO L225 Difference]: With dead ends: 300 [2021-11-07 07:46:38,180 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 07:46:38,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=2939, Invalid=26817, Unknown=0, NotChecked=0, Total=29756 [2021-11-07 07:46:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 07:46:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-07 07:46:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-11-07 07:46:38,236 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 169 [2021-11-07 07:46:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:38,237 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-11-07 07:46:38,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.2519083969465647) internal successors, (295), 131 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-11-07 07:46:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 07:46:38,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:38,239 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:38,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-11-07 07:46:38,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:38,457 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1006519243, now seen corresponding path program 81 times [2021-11-07 07:46:38,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:38,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625421623] [2021-11-07 07:46:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:38,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3323 backedges. 780 proven. 2543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:41,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:41,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625421623] [2021-11-07 07:46:41,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625421623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:41,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504899738] [2021-11-07 07:46:41,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:41,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:41,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:41,179 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:41,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b189a107-ee51-40ae-a184-bc39962e5e71/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-07 07:46:46,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2021-11-07 07:46:46,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-07 07:46:46,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3323 backedges. 0 proven. 3323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504899738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:50,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:50,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 129 [2021-11-07 07:46:50,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612238494] [2021-11-07 07:46:50,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-07 07:46:50,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-07 07:46:50,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2678, Invalid=13834, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:46:50,403 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 129 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)