./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:54:37,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:54:37,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:54:37,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:54:37,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:54:37,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:54:37,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:54:37,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:54:37,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:54:37,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:54:37,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:54:37,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:54:37,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:54:37,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:54:37,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:54:37,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:54:37,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:54:37,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:54:37,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:54:37,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:54:37,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:54:37,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:54:37,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:54:37,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:54:37,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:54:37,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:54:37,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:54:37,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:54:37,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:54:37,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:54:37,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:54:37,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:54:37,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:54:37,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:54:37,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:54:37,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:54:37,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:54:37,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:54:37,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:54:37,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:54:37,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:54:37,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:54:37,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:54:37,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:54:37,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:54:37,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:54:37,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:54:37,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:54:37,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:54:37,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:54:37,746 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:54:37,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:54:37,747 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:54:37,747 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:54:37,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:54:37,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:54:37,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:54:37,748 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:54:37,748 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:54:37,748 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:54:37,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:54:37,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:54:37,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:54:37,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:54:37,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:54:37,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:54:37,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:54:37,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:37,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:54:37,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:54:37,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:54:37,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:54:37,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:54:37,752 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_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2021-11-20 06:54:38,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:54:38,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:54:38,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:54:38,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:54:38,109 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:54:38,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-11-20 06:54:38,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/data/a241cdef0/a7115cb319714c06887200a8f1e31873/FLAG6ee098820 [2021-11-20 06:54:38,622 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:54:38,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-11-20 06:54:38,630 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/data/a241cdef0/a7115cb319714c06887200a8f1e31873/FLAG6ee098820 [2021-11-20 06:54:39,030 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/data/a241cdef0/a7115cb319714c06887200a8f1e31873 [2021-11-20 06:54:39,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:54:39,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:54:39,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:39,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:54:39,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:54:39,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c9b3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39, skipping insertion in model container [2021-11-20 06:54:39,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:54:39,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:54:39,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:39,291 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:54:39,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:39,328 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:54:39,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39 WrapperNode [2021-11-20 06:54:39,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:39,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:39,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:54:39,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:54:39,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,378 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-11-20 06:54:39,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:39,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:54:39,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:54:39,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:54:39,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:54:39,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:54:39,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:54:39,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:54:39,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (1/1) ... [2021-11-20 06:54:39,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:39,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:39,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:54:39,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:54:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:54:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:54:39,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:54:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:54:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:54:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:54:39,588 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:54:39,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:54:39,809 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:54:39,816 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:54:39,832 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:54:39,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:39 BoogieIcfgContainer [2021-11-20 06:54:39,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:54:39,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:54:39,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:54:39,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:54:39,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:54:39" (1/3) ... [2021-11-20 06:54:39,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc3e262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:39, skipping insertion in model container [2021-11-20 06:54:39,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:39" (2/3) ... [2021-11-20 06:54:39,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc3e262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:39, skipping insertion in model container [2021-11-20 06:54:39,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:39" (3/3) ... [2021-11-20 06:54:39,843 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2021-11-20 06:54:39,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:54:39,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-20 06:54:39,936 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:54:39,947 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-20 06:54:39,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-20 06:54:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 06:54:39,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:39,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 06:54:39,983 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-11-20 06:54:39,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021745997] [2021-11-20 06:54:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:39,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:40,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:40,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021745997] [2021-11-20 06:54:40,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021745997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:40,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:40,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:40,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890311102] [2021-11-20 06:54:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:40,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:40,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:40,258 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:40,329 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-20 06:54:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:40,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 06:54:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:40,340 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:54:40,341 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 06:54:40,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:40,349 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:40,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 06:54:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-11-20 06:54:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 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) [2021-11-20 06:54:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-20 06:54:40,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-11-20 06:54:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:40,391 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-20 06:54:40,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-20 06:54:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:54:40,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:40,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:54:40,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:54:40,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-11-20 06:54:40,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519482560] [2021-11-20 06:54:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:40,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:40,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519482560] [2021-11-20 06:54:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519482560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:40,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:40,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:40,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312760259] [2021-11-20 06:54:40,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:40,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:40,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:40,453 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:40,501 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-20 06:54:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:40,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:54:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:40,503 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:54:40,503 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 06:54:40,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:40,508 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:40,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 06:54:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-11-20 06:54:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-20 06:54:40,515 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-20 06:54:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:40,515 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-20 06:54:40,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-20 06:54:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:54:40,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:40,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:54:40,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:54:40,517 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:40,517 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-11-20 06:54:40,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:40,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222677613] [2021-11-20 06:54:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:40,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:40,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:40,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222677613] [2021-11-20 06:54:40,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222677613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:40,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:40,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:40,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102517433] [2021-11-20 06:54:40,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:40,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:40,598 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:40,640 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-20 06:54:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:54:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:40,641 INFO L225 Difference]: With dead ends: 32 [2021-11-20 06:54:40,641 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:54:40,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:40,643 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:40,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:54:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 06:54:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 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) [2021-11-20 06:54:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 06:54:40,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-20 06:54:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 06:54:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 06:54:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:54:40,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:40,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:54:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:54:40,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-11-20 06:54:40,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:40,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27234049] [2021-11-20 06:54:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:40,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:40,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:40,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27234049] [2021-11-20 06:54:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27234049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:40,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:40,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:40,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115648519] [2021-11-20 06:54:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:40,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:40,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:40,735 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:40,864 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-20 06:54:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:54:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:54:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:40,866 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:54:40,866 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 06:54:40,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:40,869 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:40,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 06:54:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-20 06:54:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-20 06:54:40,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-20 06:54:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:40,890 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-20 06:54:40,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-20 06:54:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:54:40,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:40,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:54:40,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-11-20 06:54:40,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:40,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031427824] [2021-11-20 06:54:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:40,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:40,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031427824] [2021-11-20 06:54:40,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031427824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:40,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144890800] [2021-11-20 06:54:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:40,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:40,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:40,999 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:41,014 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-20 06:54:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 06:54:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:41,015 INFO L225 Difference]: With dead ends: 31 [2021-11-20 06:54:41,015 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 06:54:41,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:41,017 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:41,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 06:54:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 06:54:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 30 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) [2021-11-20 06:54:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-20 06:54:41,022 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2021-11-20 06:54:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:41,022 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-20 06:54:41,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-20 06:54:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:54:41,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:41,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:41,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:54:41,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2021-11-20 06:54:41,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:41,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269839728] [2021-11-20 06:54:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:41,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:41,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:41,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269839728] [2021-11-20 06:54:41,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269839728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:41,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:41,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:41,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017895961] [2021-11-20 06:54:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:41,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:41,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:41,096 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:41,181 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-11-20 06:54:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 06:54:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:41,182 INFO L225 Difference]: With dead ends: 56 [2021-11-20 06:54:41,183 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 06:54:41,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:41,184 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:41,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 06:54:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-11-20 06:54:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 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) [2021-11-20 06:54:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 06:54:41,198 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 7 [2021-11-20 06:54:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:41,199 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 06:54:41,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 06:54:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:54:41,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:41,203 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:41,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:54:41,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-11-20 06:54:41,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049733780] [2021-11-20 06:54:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:41,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:41,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049733780] [2021-11-20 06:54:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049733780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414488342] [2021-11-20 06:54:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:41,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:41,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:41,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:41,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:54:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:54:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:41,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:41,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414488342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:41,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-20 06:54:41,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120873389] [2021-11-20 06:54:41,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:41,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:54:41,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:54:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:54:41,540 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:41,627 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-11-20 06:54:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:54:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:54:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:41,635 INFO L225 Difference]: With dead ends: 120 [2021-11-20 06:54:41,636 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 06:54:41,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:54:41,642 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 131 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:41,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 129 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 06:54:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2021-11-20 06:54:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 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) [2021-11-20 06:54:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-20 06:54:41,656 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-11-20 06:54:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:41,663 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-20 06:54:41,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-20 06:54:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:54:41,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:41,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:41,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:41,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:41,876 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-11-20 06:54:41,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:41,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396832907] [2021-11-20 06:54:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:41,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:54:41,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396832907] [2021-11-20 06:54:41,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396832907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:41,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:41,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:41,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635350154] [2021-11-20 06:54:41,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:41,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:54:41,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:54:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:41,999 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:42,074 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-11-20 06:54:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:54:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-20 06:54:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:42,079 INFO L225 Difference]: With dead ends: 63 [2021-11-20 06:54:42,079 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 06:54:42,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:54:42,083 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:42,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 42 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 06:54:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-11-20 06:54:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 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) [2021-11-20 06:54:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-20 06:54:42,099 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 11 [2021-11-20 06:54:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:42,099 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-20 06:54:42,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-20 06:54:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:54:42,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:42,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:42,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:54:42,101 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2021-11-20 06:54:42,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:42,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053553439] [2021-11-20 06:54:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:42,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:42,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:42,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053553439] [2021-11-20 06:54:42,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053553439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:42,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258431114] [2021-11-20 06:54:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:42,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:42,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:42,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:54:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:54:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:42,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:42,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258431114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:42,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:42,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 06:54:42,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166591743] [2021-11-20 06:54:42,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:42,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:54:42,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:54:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:54:42,446 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-11-20 06:54:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:42,626 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-20 06:54:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:54:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) Word has length 12 [2021-11-20 06:54:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:42,627 INFO L225 Difference]: With dead ends: 80 [2021-11-20 06:54:42,627 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:54:42,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:54:42,631 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:42,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 55 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:54:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-11-20 06:54:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-20 06:54:42,649 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 12 [2021-11-20 06:54:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:42,650 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-20 06:54:42,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-11-20 06:54:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-20 06:54:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:54:42,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:42,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:42,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:42,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:42,868 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 2 times [2021-11-20 06:54:42,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:42,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066050424] [2021-11-20 06:54:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:42,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:42,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066050424] [2021-11-20 06:54:42,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066050424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:42,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:42,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:42,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699723083] [2021-11-20 06:54:42,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:42,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:42,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:42,972 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2021-11-20 06:54:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:43,003 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-11-20 06:54:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) Word has length 17 [2021-11-20 06:54:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:43,005 INFO L225 Difference]: With dead ends: 72 [2021-11-20 06:54:43,006 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 06:54:43,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:43,007 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:43,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 06:54:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-20 06:54:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-11-20 06:54:43,029 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 17 [2021-11-20 06:54:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:43,030 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-11-20 06:54:43,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2021-11-20 06:54:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-11-20 06:54:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:54:43,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:43,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:43,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:54:43,033 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2021-11-20 06:54:43,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:43,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522494189] [2021-11-20 06:54:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:43,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:43,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:43,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522494189] [2021-11-20 06:54:43,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522494189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:43,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742411683] [2021-11-20 06:54:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:43,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:43,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:43,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:54:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:43,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:54:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:43,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-20 06:54:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:43,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742411683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:43,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:43,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 06:54:43,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909755317] [2021-11-20 06:54:43,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:43,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:54:43,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:54:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:54:43,579 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:43,671 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-11-20 06:54:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:54:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:54:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:43,672 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:54:43,673 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 06:54:43,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:54:43,674 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:43,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 06:54:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-11-20 06:54:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.196969696969697) internal successors, (79), 69 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) [2021-11-20 06:54:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-11-20 06:54:43,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 23 [2021-11-20 06:54:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:43,680 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-11-20 06:54:43,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-11-20 06:54:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:54:43,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:43,682 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-20 06:54:43,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:43,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:43,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-11-20 06:54:43,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135966673] [2021-11-20 06:54:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:43,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:54:44,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135966673] [2021-11-20 06:54:44,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135966673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705687067] [2021-11-20 06:54:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:54:44,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:44,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:44,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:44,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:54:44,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:54:44,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:54:44,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:44,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:44,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705687067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:44,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:44,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-20 06:54:44,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967668433] [2021-11-20 06:54:44,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:44,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:54:44,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:54:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:54:44,185 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-11-20 06:54:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:44,274 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-20 06:54:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:54:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 25 [2021-11-20 06:54:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:44,275 INFO L225 Difference]: With dead ends: 84 [2021-11-20 06:54:44,275 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 06:54:44,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:54:44,276 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:44,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 56 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 06:54:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2021-11-20 06:54:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-20 06:54:44,280 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 25 [2021-11-20 06:54:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:44,280 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-20 06:54:44,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-11-20 06:54:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-20 06:54:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:54:44,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:44,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:44,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:44,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:54:44,508 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2021-11-20 06:54:44,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:44,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905159657] [2021-11-20 06:54:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:44,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:44,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905159657] [2021-11-20 06:54:44,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905159657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778244026] [2021-11-20 06:54:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:44,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:44,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:44,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:44,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:54:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:44,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:54:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:54:44,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:44,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778244026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:44,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 06:54:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912051218] [2021-11-20 06:54:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:44,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:54:44,908 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:44,922 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-20 06:54:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 06:54:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:44,925 INFO L225 Difference]: With dead ends: 60 [2021-11-20 06:54:44,925 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 06:54:44,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:54:44,927 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:44,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-20 06:54:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 06:54:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-20 06:54:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-20 06:54:44,931 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 26 [2021-11-20 06:54:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:44,932 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-20 06:54:44,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-20 06:54:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:54:44,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:44,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:44,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:45,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:54:45,137 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2021-11-20 06:54:45,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618067201] [2021-11-20 06:54:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:45,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:54:45,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618067201] [2021-11-20 06:54:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618067201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335985814] [2021-11-20 06:54:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:45,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:45,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:54:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:54:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:45,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:54:45,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:54:45,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:54:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-11-20 06:54:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:45,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:45,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-20 06:54:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-20 06:54:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335985814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:45,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:45,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2021-11-20 06:54:45,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19527882] [2021-11-20 06:54:45,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:54:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:54:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:54:45,845 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:46,153 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-20 06:54:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:54:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 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 27 [2021-11-20 06:54:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:46,154 INFO L225 Difference]: With dead ends: 97 [2021-11-20 06:54:46,154 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 06:54:46,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:54:46,155 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:46,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 131 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:54:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 06:54:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-11-20 06:54:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 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) [2021-11-20 06:54:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-20 06:54:46,158 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 27 [2021-11-20 06:54:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:46,159 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-20 06:54:46,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-20 06:54:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:54:46,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:46,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:46,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:46,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:54:46,376 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2021-11-20 06:54:46,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:46,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095743691] [2021-11-20 06:54:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:46,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:46,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095743691] [2021-11-20 06:54:46,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095743691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887089361] [2021-11-20 06:54:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:46,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:46,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:46,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:46,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:54:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:46,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:54:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:46,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:46,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887089361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:46,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:46,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-20 06:54:46,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268876665] [2021-11-20 06:54:46,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:46,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:54:46,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:54:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:54:46,744 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 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) [2021-11-20 06:54:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:46,897 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-11-20 06:54:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:54:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 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 34 [2021-11-20 06:54:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:46,898 INFO L225 Difference]: With dead ends: 64 [2021-11-20 06:54:46,898 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 06:54:46,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:54:46,899 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:46,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 06:54:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-20 06:54:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 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) [2021-11-20 06:54:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-11-20 06:54:46,902 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 34 [2021-11-20 06:54:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:46,902 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-11-20 06:54:46,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 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) [2021-11-20 06:54:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-11-20 06:54:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:54:46,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:46,903 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:46,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:47,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:47,112 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2021-11-20 06:54:47,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:47,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7098838] [2021-11-20 06:54:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:47,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:47,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7098838] [2021-11-20 06:54:47,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7098838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731225861] [2021-11-20 06:54:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:54:47,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:47,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:47,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:54:47,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:54:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:54:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:47,327 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:54:47,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:54:47,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 06:54:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:48,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:48,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731225861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:48,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:48,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-11-20 06:54:48,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084115558] [2021-11-20 06:54:48,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:48,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:54:48,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:54:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:54:48,063 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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) [2021-11-20 06:54:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:48,087 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-11-20 06:54:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:54:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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) Word has length 39 [2021-11-20 06:54:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:48,088 INFO L225 Difference]: With dead ends: 63 [2021-11-20 06:54:48,088 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 06:54:48,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:54:48,089 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:48,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2021-11-20 06:54:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 06:54:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-20 06:54:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-11-20 06:54:48,092 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 39 [2021-11-20 06:54:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:48,093 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-11-20 06:54:48,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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) [2021-11-20 06:54:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-11-20 06:54:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:54:48,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:48,094 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:48,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:48,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:54:48,308 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2021-11-20 06:54:48,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:48,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885213357] [2021-11-20 06:54:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:48,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:54:48,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:48,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885213357] [2021-11-20 06:54:48,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885213357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:48,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379268692] [2021-11-20 06:54:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:48,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:48,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:48,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:48,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:54:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:54:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:54:48,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:54:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379268692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:48,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:48,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-11-20 06:54:48,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700566615] [2021-11-20 06:54:48,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:48,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:54:48,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:54:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:54:48,707 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:48,922 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-11-20 06:54:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:54:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-20 06:54:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:48,923 INFO L225 Difference]: With dead ends: 107 [2021-11-20 06:54:48,923 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:54:48,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:54:48,924 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 192 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:48,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 67 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:54:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-11-20 06:54:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-20 06:54:48,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 42 [2021-11-20 06:54:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-20 06:54:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-20 06:54:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:54:48,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:48,929 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:48,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:49,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:54:49,140 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:49,141 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2021-11-20 06:54:49,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:49,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296444029] [2021-11-20 06:54:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:49,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:54:49,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:49,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296444029] [2021-11-20 06:54:49,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296444029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:49,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595894694] [2021-11-20 06:54:49,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:54:49,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:49,230 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:49,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:54:49,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:54:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:54:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:49,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 06:54:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:50,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595894694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:50,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:50,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2021-11-20 06:54:50,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841645199] [2021-11-20 06:54:50,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:50,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:54:50,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:54:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:54:50,063 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2021-11-20 06:54:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:50,234 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-11-20 06:54:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:54:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 06:54:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:50,236 INFO L225 Difference]: With dead ends: 121 [2021-11-20 06:54:50,236 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 06:54:50,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:54:50,237 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:50,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 110 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 06:54:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2021-11-20 06:54:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.069767441860465) internal successors, (92), 88 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) [2021-11-20 06:54:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-20 06:54:50,240 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 49 [2021-11-20 06:54:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:50,241 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-20 06:54:50,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2021-11-20 06:54:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-20 06:54:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:54:50,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:50,242 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-20 06:54:50,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:50,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:54:50,442 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2021-11-20 06:54:50,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401989202] [2021-11-20 06:54:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:50,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:50,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401989202] [2021-11-20 06:54:50,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401989202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056371426] [2021-11-20 06:54:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:54:50,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:50,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:50,581 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:50,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:54:50,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:54:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:54:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:50,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:54:51,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056371426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:51,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:51,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-20 06:54:51,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277814839] [2021-11-20 06:54:51,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:51,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:54:51,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:54:51,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:54:51,038 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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) [2021-11-20 06:54:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:51,509 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2021-11-20 06:54:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:54:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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 64 [2021-11-20 06:54:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:51,511 INFO L225 Difference]: With dead ends: 170 [2021-11-20 06:54:51,511 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:54:51,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:54:51,513 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:51,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 113 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:54:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:54:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 110. [2021-11-20 06:54:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.0654205607476634) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-20 06:54:51,519 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 64 [2021-11-20 06:54:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:51,519 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-20 06:54:51,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 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) [2021-11-20 06:54:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-20 06:54:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 06:54:51,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:51,521 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 06:54:51,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:51,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:51,722 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:51,722 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2021-11-20 06:54:51,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:51,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971767442] [2021-11-20 06:54:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:51,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:54:51,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:51,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971767442] [2021-11-20 06:54:51,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971767442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:51,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530953701] [2021-11-20 06:54:51,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:54:51,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:51,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:51,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:51,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:54:51,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:54:51,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:54:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:51,949 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:54:51,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:54:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 06:54:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 06:54:52,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530953701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:52,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:52,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-20 06:54:52,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848089141] [2021-11-20 06:54:52,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:52,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:54:52,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:54:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:54:52,679 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-11-20 06:54:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:52,681 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-11-20 06:54:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:54:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 75 [2021-11-20 06:54:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:52,682 INFO L225 Difference]: With dead ends: 109 [2021-11-20 06:54:52,682 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 06:54:52,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:54:52,683 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:52,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-20 06:54:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 06:54:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-20 06:54:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0560747663551402) internal successors, (113), 108 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) [2021-11-20 06:54:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-11-20 06:54:52,687 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 75 [2021-11-20 06:54:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:52,688 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-11-20 06:54:52,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-11-20 06:54:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-11-20 06:54:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 06:54:52,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:52,689 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:52,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:52,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:52,904 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2021-11-20 06:54:52,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:52,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160019037] [2021-11-20 06:54:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:52,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:54:52,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:52,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160019037] [2021-11-20 06:54:52,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160019037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795831728] [2021-11-20 06:54:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:52,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:52,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:53,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:54:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:53,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:54:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:54:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:54:53,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795831728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:53,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:53,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-20 06:54:53,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250888186] [2021-11-20 06:54:53,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:53,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:54:53,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:54:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:54:53,480 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:53,717 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-11-20 06:54:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:54:53,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 06:54:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:53,719 INFO L225 Difference]: With dead ends: 112 [2021-11-20 06:54:53,719 INFO L226 Difference]: Without dead ends: 112 [2021-11-20 06:54:53,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:54:53,720 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:53,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 64 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-20 06:54:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-11-20 06:54:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 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) [2021-11-20 06:54:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-11-20 06:54:53,724 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 80 [2021-11-20 06:54:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:53,728 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-11-20 06:54:53,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-11-20 06:54:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:54:53,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:53,733 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:53,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:53,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:54:53,945 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2021-11-20 06:54:53,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:53,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003221040] [2021-11-20 06:54:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:53,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 06:54:54,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003221040] [2021-11-20 06:54:54,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003221040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640769513] [2021-11-20 06:54:54,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:54:54,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:54,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:54,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:54,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:54:54,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:54:54,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:54,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:54:54,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-20 06:54:54,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:54,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640769513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:54,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:54,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-20 06:54:54,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625648907] [2021-11-20 06:54:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:54,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:54,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:54:54,814 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2021-11-20 06:54:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:54,823 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-20 06:54:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-20 06:54:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:54,827 INFO L225 Difference]: With dead ends: 108 [2021-11-20 06:54:54,827 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 06:54:54,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:54:54,828 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:54,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2021-11-20 06:54:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 06:54:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 06:54:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-11-20 06:54:54,832 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2021-11-20 06:54:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:54,833 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-11-20 06:54:54,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2021-11-20 06:54:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-11-20 06:54:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 06:54:54,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:54,834 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-20 06:54:54,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:55,040 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2021-11-20 06:54:55,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:55,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596842141] [2021-11-20 06:54:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:55,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 06:54:55,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596842141] [2021-11-20 06:54:55,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596842141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177775314] [2021-11-20 06:54:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:54:55,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:55,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:55,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:54:55,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:54:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:54:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 06:54:55,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 06:54:55,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177775314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:55,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:55,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-11-20 06:54:55,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985446148] [2021-11-20 06:54:55,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:55,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:54:55,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:54:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:54:55,671 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) [2021-11-20 06:54:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:55,871 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2021-11-20 06:54:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:54:55,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-20 06:54:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:55,873 INFO L225 Difference]: With dead ends: 158 [2021-11-20 06:54:55,873 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 06:54:55,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:54:55,874 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 243 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:55,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 93 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 06:54:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2021-11-20 06:54:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 121 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2021-11-20 06:54:55,878 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 91 [2021-11-20 06:54:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:55,878 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2021-11-20 06:54:55,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) [2021-11-20 06:54:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2021-11-20 06:54:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:54:55,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:55,880 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-20 06:54:55,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:56,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:56,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2021-11-20 06:54:56,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:56,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636662441] [2021-11-20 06:54:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:56,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 65 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-20 06:54:56,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:56,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636662441] [2021-11-20 06:54:56,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636662441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:56,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424703352] [2021-11-20 06:54:56,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:54:56,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:56,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:56,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:56,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:54:56,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:54:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:56,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:54:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:54:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:54:57,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424703352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:57,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:54:57,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 34 [2021-11-20 06:54:57,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761092731] [2021-11-20 06:54:57,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:57,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:54:57,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:54:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=794, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:54:57,306 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 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) [2021-11-20 06:54:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:58,543 INFO L93 Difference]: Finished difference Result 363 states and 389 transitions. [2021-11-20 06:54:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 06:54:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 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 121 [2021-11-20 06:54:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:58,545 INFO L225 Difference]: With dead ends: 363 [2021-11-20 06:54:58,546 INFO L226 Difference]: Without dead ends: 363 [2021-11-20 06:54:58,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2612, Invalid=6318, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 06:54:58,551 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 268 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:58,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 68 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:54:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-20 06:54:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2021-11-20 06:54:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0769230769230769) internal successors, (378), 351 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 378 transitions. [2021-11-20 06:54:58,560 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 378 transitions. Word has length 121 [2021-11-20 06:54:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:58,561 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 378 transitions. [2021-11-20 06:54:58,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 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) [2021-11-20 06:54:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 378 transitions. [2021-11-20 06:54:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-20 06:54:58,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:58,565 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-20 06:54:58,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:58,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:54:58,788 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:54:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash -303332105, now seen corresponding path program 5 times [2021-11-20 06:54:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:58,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073616248] [2021-11-20 06:54:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:58,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2063 proven. 334 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2021-11-20 06:54:58,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:58,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073616248] [2021-11-20 06:54:58,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073616248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:58,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650211511] [2021-11-20 06:54:58,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:54:58,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:58,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:58,973 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:58,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:54:59,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 06:54:59,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:59,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:54:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2165 proven. 249 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2021-11-20 06:54:59,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2220 proven. 194 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2021-11-20 06:55:00,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650211511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:00,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:00,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 25 [2021-11-20 06:55:00,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698717798] [2021-11-20 06:55:00,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:00,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:55:00,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:55:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:55:00,211 INFO L87 Difference]: Start difference. First operand 352 states and 378 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:00,737 INFO L93 Difference]: Finished difference Result 352 states and 372 transitions. [2021-11-20 06:55:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:55:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 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 256 [2021-11-20 06:55:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:00,740 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:55:00,740 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 06:55:00,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:55:00,742 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 158 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:00,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 70 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:55:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 06:55:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-20 06:55:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0598290598290598) internal successors, (372), 351 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 372 transitions. [2021-11-20 06:55:00,761 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 372 transitions. Word has length 256 [2021-11-20 06:55:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:00,761 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 372 transitions. [2021-11-20 06:55:00,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 372 transitions. [2021-11-20 06:55:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-20 06:55:00,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:00,766 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-20 06:55:00,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:00,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:55:00,981 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 6 times [2021-11-20 06:55:00,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:00,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412152160] [2021-11-20 06:55:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:00,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 2998 proven. 603 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-11-20 06:55:01,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412152160] [2021-11-20 06:55:01,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412152160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139970739] [2021-11-20 06:55:01,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:55:01,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:01,186 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:01,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:55:01,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-20 06:55:01,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:55:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3158 proven. 443 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-11-20 06:55:02,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3158 proven. 443 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-11-20 06:55:02,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139970739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:02,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:02,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2021-11-20 06:55:02,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963328474] [2021-11-20 06:55:02,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:02,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:55:02,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:55:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:55:02,695 INFO L87 Difference]: Start difference. First operand 352 states and 372 transitions. Second operand has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 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) [2021-11-20 06:55:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:03,110 INFO L93 Difference]: Finished difference Result 352 states and 367 transitions. [2021-11-20 06:55:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:55:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 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) Word has length 281 [2021-11-20 06:55:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:03,113 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:55:03,113 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 06:55:03,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:55:03,115 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:03,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 115 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:55:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 06:55:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-20 06:55:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0455840455840455) internal successors, (367), 351 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 367 transitions. [2021-11-20 06:55:03,124 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 367 transitions. Word has length 281 [2021-11-20 06:55:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:03,125 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 367 transitions. [2021-11-20 06:55:03,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 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) [2021-11-20 06:55:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 367 transitions. [2021-11-20 06:55:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-20 06:55:03,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:03,130 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-20 06:55:03,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:03,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:55:03,344 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 7 times [2021-11-20 06:55:03,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546719333] [2021-11-20 06:55:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:03,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 3902 proven. 971 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-20 06:55:03,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:03,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546719333] [2021-11-20 06:55:03,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546719333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:03,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611794639] [2021-11-20 06:55:03,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:55:03,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:03,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:03,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:03,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:55:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:55:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-20 06:55:04,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-20 06:55:05,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611794639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:05,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:05,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2021-11-20 06:55:05,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965296173] [2021-11-20 06:55:05,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:05,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:55:05,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:55:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:55:05,128 INFO L87 Difference]: Start difference. First operand 352 states and 367 transitions. Second operand has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:05,777 INFO L93 Difference]: Finished difference Result 352 states and 363 transitions. [2021-11-20 06:55:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:55:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 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 301 [2021-11-20 06:55:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:05,780 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:55:05,780 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 06:55:05,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=681, Invalid=1971, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:55:05,782 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:05,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 119 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:55:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 06:55:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-20 06:55:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0341880341880343) internal successors, (363), 351 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 363 transitions. [2021-11-20 06:55:05,792 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 363 transitions. Word has length 301 [2021-11-20 06:55:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:05,792 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 363 transitions. [2021-11-20 06:55:05,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 363 transitions. [2021-11-20 06:55:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-20 06:55:05,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:05,799 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-20 06:55:05,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:06,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:55:06,017 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 8 times [2021-11-20 06:55:06,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:06,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150516512] [2021-11-20 06:55:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:06,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4599 proven. 1453 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-11-20 06:55:06,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:06,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150516512] [2021-11-20 06:55:06,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150516512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196548602] [2021-11-20 06:55:06,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:55:06,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:06,280 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:06,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:55:06,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:55:06,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:06,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:55:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-11-20 06:55:07,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-11-20 06:55:07,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196548602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:07,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:07,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2021-11-20 06:55:07,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974838709] [2021-11-20 06:55:07,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:07,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:55:07,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:55:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:55:07,921 INFO L87 Difference]: Start difference. First operand 352 states and 363 transitions. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 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) [2021-11-20 06:55:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:08,604 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2021-11-20 06:55:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 06:55:08,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 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 316 [2021-11-20 06:55:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:08,615 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:55:08,616 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 06:55:08,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1009, Invalid=2897, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:55:08,618 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:08,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:55:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 06:55:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-20 06:55:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0256410256410255) internal successors, (360), 351 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2021-11-20 06:55:08,626 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 316 [2021-11-20 06:55:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:08,627 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2021-11-20 06:55:08,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 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) [2021-11-20 06:55:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2021-11-20 06:55:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-20 06:55:08,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:08,629 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-20 06:55:08,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:08,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:55:08,844 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:08,844 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 9 times [2021-11-20 06:55:08,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:08,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662368507] [2021-11-20 06:55:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:08,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4868 proven. 2064 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-11-20 06:55:09,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:09,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662368507] [2021-11-20 06:55:09,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662368507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:09,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808742017] [2021-11-20 06:55:09,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:55:09,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:09,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:09,161 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:09,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:55:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 06:55:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:09,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:55:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2324 proven. 245 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2021-11-20 06:55:09,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2324 proven. 245 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2021-11-20 06:55:10,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808742017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:10,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:10,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 43 [2021-11-20 06:55:10,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910511018] [2021-11-20 06:55:10,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:10,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 06:55:10,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 06:55:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:55:10,562 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:13,423 INFO L93 Difference]: Finished difference Result 508 states and 526 transitions. [2021-11-20 06:55:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-20 06:55:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 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 326 [2021-11-20 06:55:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:13,426 INFO L225 Difference]: With dead ends: 508 [2021-11-20 06:55:13,426 INFO L226 Difference]: Without dead ends: 508 [2021-11-20 06:55:13,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3922, Invalid=13900, Unknown=0, NotChecked=0, Total=17822 [2021-11-20 06:55:13,433 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 928 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:13,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 192 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:55:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-20 06:55:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 412. [2021-11-20 06:55:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.0462287104622872) internal successors, (430), 411 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 430 transitions. [2021-11-20 06:55:13,443 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 430 transitions. Word has length 326 [2021-11-20 06:55:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:13,444 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 430 transitions. [2021-11-20 06:55:13,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 430 transitions. [2021-11-20 06:55:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-11-20 06:55:13,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:13,447 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-20 06:55:13,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:13,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:55:13,672 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -439414264, now seen corresponding path program 10 times [2021-11-20 06:55:13,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147785784] [2021-11-20 06:55:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:13,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 282 proven. 10317 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2021-11-20 06:55:14,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147785784] [2021-11-20 06:55:14,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147785784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889427821] [2021-11-20 06:55:14,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:55:14,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:14,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:14,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:55:14,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:55:14,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 06:55:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 1243 proven. 9710 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-20 06:55:16,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 1243 proven. 9710 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-20 06:55:17,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889427821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:17,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:17,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34, 34] total 68 [2021-11-20 06:55:17,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825064212] [2021-11-20 06:55:17,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:17,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-20 06:55:17,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-20 06:55:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=3249, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:55:17,586 INFO L87 Difference]: Start difference. First operand 412 states and 430 transitions. Second operand has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:24,079 INFO L93 Difference]: Finished difference Result 1333 states and 1429 transitions. [2021-11-20 06:55:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-11-20 06:55:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 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 391 [2021-11-20 06:55:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:24,086 INFO L225 Difference]: With dead ends: 1333 [2021-11-20 06:55:24,086 INFO L226 Difference]: Without dead ends: 1333 [2021-11-20 06:55:24,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 736 SyntacticMatches, 1 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51377 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=28784, Invalid=68248, Unknown=0, NotChecked=0, Total=97032 [2021-11-20 06:55:24,096 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 513 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:24,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 166 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:55:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-11-20 06:55:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1322. [2021-11-20 06:55:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.073429220287661) internal successors, (1418), 1321 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1418 transitions. [2021-11-20 06:55:24,124 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1418 transitions. Word has length 391 [2021-11-20 06:55:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:24,124 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1418 transitions. [2021-11-20 06:55:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1418 transitions. [2021-11-20 06:55:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2021-11-20 06:55:24,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:24,134 INFO L514 BasicCegarLoop]: trace histogram [157, 156, 156, 156, 156, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-20 06:55:24,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-20 06:55:24,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:24,356 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash 101068528, now seen corresponding path program 11 times [2021-11-20 06:55:24,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:24,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405514087] [2021-11-20 06:55:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:24,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 33501 proven. 2819 refuted. 0 times theorem prover too weak. 28357 trivial. 0 not checked. [2021-11-20 06:55:25,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:25,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405514087] [2021-11-20 06:55:25,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405514087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733995750] [2021-11-20 06:55:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:55:25,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:25,033 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:25,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:55:25,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-20 06:55:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:55:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 33683 proven. 2520 refuted. 0 times theorem prover too weak. 28474 trivial. 0 not checked. [2021-11-20 06:55:27,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 34354 proven. 1849 refuted. 0 times theorem prover too weak. 28474 trivial. 0 not checked. [2021-11-20 06:55:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733995750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:28,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:28,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 42 [2021-11-20 06:55:28,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938207621] [2021-11-20 06:55:28,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:28,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 06:55:28,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 06:55:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1383, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:55:28,954 INFO L87 Difference]: Start difference. First operand 1322 states and 1418 transitions. Second operand has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:31,055 INFO L93 Difference]: Finished difference Result 1322 states and 1407 transitions. [2021-11-20 06:55:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 06:55:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 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 911 [2021-11-20 06:55:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:31,063 INFO L225 Difference]: With dead ends: 1322 [2021-11-20 06:55:31,063 INFO L226 Difference]: Without dead ends: 1322 [2021-11-20 06:55:31,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1802 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2523, Invalid=9249, Unknown=0, NotChecked=0, Total=11772 [2021-11-20 06:55:31,065 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:31,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 164 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:55:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-11-20 06:55:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1322. [2021-11-20 06:55:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.065102195306586) internal successors, (1407), 1321 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1407 transitions. [2021-11-20 06:55:31,092 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1407 transitions. Word has length 911 [2021-11-20 06:55:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1407 transitions. [2021-11-20 06:55:31,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1407 transitions. [2021-11-20 06:55:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2021-11-20 06:55:31,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:31,103 INFO L514 BasicCegarLoop]: trace histogram [167, 166, 166, 166, 166, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-20 06:55:31,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:31,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 06:55:31,316 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1688945128, now seen corresponding path program 12 times [2021-11-20 06:55:31,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:31,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897650803] [2021-11-20 06:55:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:31,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 41263 proven. 3733 refuted. 0 times theorem prover too weak. 27906 trivial. 0 not checked. [2021-11-20 06:55:32,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:32,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897650803] [2021-11-20 06:55:32,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897650803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:32,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541721473] [2021-11-20 06:55:32,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:55:32,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:32,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:32,006 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:32,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:55:32,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-20 06:55:32,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:55:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 22608 proven. 1400 refuted. 0 times theorem prover too weak. 48894 trivial. 0 not checked. [2021-11-20 06:55:34,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 22523 proven. 1485 refuted. 0 times theorem prover too weak. 48894 trivial. 0 not checked. [2021-11-20 06:55:36,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541721473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:36,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:36,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 57 [2021-11-20 06:55:36,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892277891] [2021-11-20 06:55:36,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:36,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 06:55:36,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 06:55:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=2624, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 06:55:36,115 INFO L87 Difference]: Start difference. First operand 1322 states and 1407 transitions. Second operand has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:44,239 INFO L93 Difference]: Finished difference Result 1500 states and 1587 transitions. [2021-11-20 06:55:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-20 06:55:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 0 states have call successors, (0), 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 961 [2021-11-20 06:55:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:44,247 INFO L225 Difference]: With dead ends: 1500 [2021-11-20 06:55:44,247 INFO L226 Difference]: Without dead ends: 1500 [2021-11-20 06:55:44,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2133 GetRequests, 1889 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19547 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=12029, Invalid=48241, Unknown=0, NotChecked=0, Total=60270 [2021-11-20 06:55:44,252 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2357 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2357 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:44,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2357 Valid, 220 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:55:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-20 06:55:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1439. [2021-11-20 06:55:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0611961057023644) internal successors, (1526), 1438 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1526 transitions. [2021-11-20 06:55:44,279 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1526 transitions. Word has length 961 [2021-11-20 06:55:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:44,280 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1526 transitions. [2021-11-20 06:55:44,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1526 transitions. [2021-11-20 06:55:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2021-11-20 06:55:44,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:44,292 INFO L514 BasicCegarLoop]: trace histogram [187, 186, 186, 186, 186, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-20 06:55:44,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:44,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:44,520 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1610252424, now seen corresponding path program 13 times [2021-11-20 06:55:44,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:44,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098670007] [2021-11-20 06:55:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:44,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 53705 proven. 4821 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-11-20 06:55:45,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098670007] [2021-11-20 06:55:45,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098670007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734481246] [2021-11-20 06:55:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:55:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:45,314 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:45,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:55:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2815 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:55:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 54480 proven. 4046 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-11-20 06:55:47,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 54480 proven. 4046 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-11-20 06:55:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734481246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:49,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:49,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 39 [2021-11-20 06:55:49,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709895582] [2021-11-20 06:55:49,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:49,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:55:49,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:55:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:55:49,561 INFO L87 Difference]: Start difference. First operand 1439 states and 1526 transitions. Second operand has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:51,125 INFO L93 Difference]: Finished difference Result 1439 states and 1516 transitions. [2021-11-20 06:55:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-20 06:55:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 0 states have call successors, (0), 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 1061 [2021-11-20 06:55:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:51,132 INFO L225 Difference]: With dead ends: 1439 [2021-11-20 06:55:51,132 INFO L226 Difference]: Without dead ends: 1439 [2021-11-20 06:55:51,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2223 GetRequests, 2108 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3976 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3641, Invalid=9931, Unknown=0, NotChecked=0, Total=13572 [2021-11-20 06:55:51,135 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:51,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 293 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-20 06:55:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-11-20 06:55:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0542420027816413) internal successors, (1516), 1438 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1516 transitions. [2021-11-20 06:55:51,167 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1516 transitions. Word has length 1061 [2021-11-20 06:55:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:51,168 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1516 transitions. [2021-11-20 06:55:51,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1516 transitions. [2021-11-20 06:55:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2021-11-20 06:55:51,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:51,187 INFO L514 BasicCegarLoop]: trace histogram [194, 193, 193, 193, 193, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-20 06:55:51,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:51,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 06:55:51,408 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1882823689, now seen corresponding path program 14 times [2021-11-20 06:55:51,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35900234] [2021-11-20 06:55:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:51,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 62243 proven. 6098 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-11-20 06:55:52,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35900234] [2021-11-20 06:55:52,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35900234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056640027] [2021-11-20 06:55:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:55:52,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:52,252 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:52,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:55:52,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:55:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:55:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:55:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 63159 proven. 5182 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-11-20 06:55:54,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 63159 proven. 5182 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-11-20 06:55:56,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056640027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:56,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:56,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 42 [2021-11-20 06:55:56,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054154041] [2021-11-20 06:55:56,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:56,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 06:55:56,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 06:55:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:55:56,538 INFO L87 Difference]: Start difference. First operand 1439 states and 1516 transitions. Second operand has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:58,390 INFO L93 Difference]: Finished difference Result 1439 states and 1507 transitions. [2021-11-20 06:55:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-20 06:55:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 0 states have call successors, (0), 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 1096 [2021-11-20 06:55:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:58,410 INFO L225 Difference]: With dead ends: 1439 [2021-11-20 06:55:58,411 INFO L226 Difference]: Without dead ends: 1439 [2021-11-20 06:55:58,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2308 GetRequests, 2177 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4754, Invalid=12802, Unknown=0, NotChecked=0, Total=17556 [2021-11-20 06:55:58,413 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:58,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 220 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-20 06:55:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-11-20 06:55:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0479833101529903) internal successors, (1507), 1438 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1507 transitions. [2021-11-20 06:55:58,455 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1507 transitions. Word has length 1096 [2021-11-20 06:55:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:58,456 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1507 transitions. [2021-11-20 06:55:58,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1507 transitions. [2021-11-20 06:55:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2021-11-20 06:55:58,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:58,469 INFO L514 BasicCegarLoop]: trace histogram [200, 199, 199, 199, 199, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-20 06:55:58,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:58,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 06:55:58,684 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:55:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:58,685 INFO L85 PathProgramCache]: Analyzing trace with hash -473738113, now seen corresponding path program 15 times [2021-11-20 06:55:58,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170029560] [2021-11-20 06:55:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:58,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 70526 proven. 7579 refuted. 0 times theorem prover too weak. 25487 trivial. 0 not checked. [2021-11-20 06:55:59,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:59,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170029560] [2021-11-20 06:55:59,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170029560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:59,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253364927] [2021-11-20 06:55:59,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:55:59,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:59,808 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:59,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:56:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-20 06:56:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:56:00,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:56:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 20238 proven. 1199 refuted. 0 times theorem prover too weak. 82155 trivial. 0 not checked. [2021-11-20 06:56:02,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 20238 proven. 1199 refuted. 0 times theorem prover too weak. 82155 trivial. 0 not checked. [2021-11-20 06:56:04,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253364927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:04,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:56:04,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 64 [2021-11-20 06:56:04,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005949805] [2021-11-20 06:56:04,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:04,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 06:56:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 06:56:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3227, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 06:56:04,084 INFO L87 Difference]: Start difference. First operand 1439 states and 1507 transitions. Second operand has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:10,266 INFO L93 Difference]: Finished difference Result 1846 states and 1926 transitions. [2021-11-20 06:56:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-11-20 06:56:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 0 states have call successors, (0), 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 1126 [2021-11-20 06:56:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:10,273 INFO L225 Difference]: With dead ends: 1846 [2021-11-20 06:56:10,273 INFO L226 Difference]: Without dead ends: 1846 [2021-11-20 06:56:10,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2217 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17819 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=12497, Invalid=48265, Unknown=0, NotChecked=0, Total=60762 [2021-11-20 06:56:10,277 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1288 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:10,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 375 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:56:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-11-20 06:56:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1489. [2021-11-20 06:56:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.0477150537634408) internal successors, (1559), 1488 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1559 transitions. [2021-11-20 06:56:10,304 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1559 transitions. Word has length 1126 [2021-11-20 06:56:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:10,305 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1559 transitions. [2021-11-20 06:56:10,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1559 transitions. [2021-11-20 06:56:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2021-11-20 06:56:10,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:10,318 INFO L514 BasicCegarLoop]: trace histogram [215, 214, 214, 214, 214, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-20 06:56:10,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:10,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 06:56:10,535 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:56:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 72847848, now seen corresponding path program 16 times [2021-11-20 06:56:10,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416073361] [2021-11-20 06:56:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:10,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 84238 proven. 9279 refuted. 0 times theorem prover too weak. 25825 trivial. 0 not checked. [2021-11-20 06:56:11,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416073361] [2021-11-20 06:56:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416073361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:56:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297973764] [2021-11-20 06:56:11,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:56:11,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:11,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:11,568 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:11,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:56:15,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:56:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:56:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 06:56:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 2726 proven. 111184 refuted. 0 times theorem prover too weak. 5432 trivial. 0 not checked. [2021-11-20 06:56:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 2726 proven. 111184 refuted. 0 times theorem prover too weak. 5432 trivial. 0 not checked. [2021-11-20 06:56:23,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297973764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:23,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:56:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 54, 54] total 128 [2021-11-20 06:56:23,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431641804] [2021-11-20 06:56:23,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:23,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-20 06:56:23,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-20 06:56:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2867, Invalid=13389, Unknown=0, NotChecked=0, Total=16256 [2021-11-20 06:56:23,585 INFO L87 Difference]: Start difference. First operand 1489 states and 1559 transitions. Second operand has 128 states, 128 states have (on average 7.2578125) internal successors, (929), 128 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:03,002 INFO L93 Difference]: Finished difference Result 4680 states and 4984 transitions. [2021-11-20 06:57:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 765 states. [2021-11-20 06:57:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 7.2578125) internal successors, (929), 128 states have internal predecessors, (929), 0 states have call successors, (0), 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 1201 [2021-11-20 06:57:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:03,018 INFO L225 Difference]: With dead ends: 4680 [2021-11-20 06:57:03,018 INFO L226 Difference]: Without dead ends: 4680 [2021-11-20 06:57:03,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3192 GetRequests, 2304 SyntacticMatches, 1 SemanticMatches, 887 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343111 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=100628, Invalid=688804, Unknown=0, NotChecked=0, Total=789432 [2021-11-20 06:57:03,058 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5451 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 12547 mSolverCounterSat, 1609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5451 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 14156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1609 IncrementalHoareTripleChecker+Valid, 12547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:03,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5451 Valid, 513 Invalid, 14156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1609 Valid, 12547 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 06:57:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4680 states. [2021-11-20 06:57:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4680 to 3135. [2021-11-20 06:57:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 1.05743458838545) internal successors, (3314), 3134 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 3314 transitions. [2021-11-20 06:57:03,130 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 3314 transitions. Word has length 1201 [2021-11-20 06:57:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:03,131 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 3314 transitions. [2021-11-20 06:57:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 7.2578125) internal successors, (929), 128 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 3314 transitions. [2021-11-20 06:57:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2288 [2021-11-20 06:57:03,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:03,171 INFO L514 BasicCegarLoop]: trace histogram [414, 413, 413, 413, 413, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 06:57:03,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:03,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 06:57:03,384 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:57:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1060022564, now seen corresponding path program 17 times [2021-11-20 06:57:03,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:03,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759227350] [2021-11-20 06:57:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:03,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 442336 backedges. 228325 proven. 11213 refuted. 0 times theorem prover too weak. 202798 trivial. 0 not checked. [2021-11-20 06:57:05,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:05,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759227350] [2021-11-20 06:57:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759227350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:57:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57863076] [2021-11-20 06:57:05,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:57:05,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:05,709 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:05,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:57:07,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-20 06:57:07,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:57:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:57:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 442336 backedges. 227842 proven. 11334 refuted. 0 times theorem prover too weak. 203160 trivial. 0 not checked. [2021-11-20 06:57:11,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 442336 backedges. 230487 proven. 8689 refuted. 0 times theorem prover too weak. 203160 trivial. 0 not checked. [2021-11-20 06:57:15,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57863076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:57:15,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:57:15,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 64 [2021-11-20 06:57:15,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16347965] [2021-11-20 06:57:15,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:15,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 06:57:15,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 06:57:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3267, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 06:57:15,411 INFO L87 Difference]: Start difference. First operand 3135 states and 3314 transitions. Second operand has 64 states, 64 states have (on average 6.40625) internal successors, (410), 64 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:21,591 INFO L93 Difference]: Finished difference Result 3135 states and 3295 transitions. [2021-11-20 06:57:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-20 06:57:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.40625) internal successors, (410), 64 states have internal predecessors, (410), 0 states have call successors, (0), 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 2287 [2021-11-20 06:57:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:21,601 INFO L225 Difference]: With dead ends: 3135 [2021-11-20 06:57:21,602 INFO L226 Difference]: Without dead ends: 3135 [2021-11-20 06:57:21,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4762 GetRequests, 4544 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12329 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10755, Invalid=37425, Unknown=0, NotChecked=0, Total=48180 [2021-11-20 06:57:21,605 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4397 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 4466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:21,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 228 Invalid, 4466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4397 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:57:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-11-20 06:57:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3135. [2021-11-20 06:57:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 1.051372048500319) internal successors, (3295), 3134 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 3295 transitions. [2021-11-20 06:57:21,651 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 3295 transitions. Word has length 2287 [2021-11-20 06:57:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:21,652 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 3295 transitions. [2021-11-20 06:57:21,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.40625) internal successors, (410), 64 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 3295 transitions. [2021-11-20 06:57:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2368 [2021-11-20 06:57:21,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:21,695 INFO L514 BasicCegarLoop]: trace histogram [430, 429, 429, 429, 429, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 06:57:21,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-20 06:57:21,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:57:21,895 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:57:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1427472996, now seen corresponding path program 18 times [2021-11-20 06:57:21,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129863490] [2021-11-20 06:57:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:21,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 476504 backedges. 261492 proven. 13396 refuted. 0 times theorem prover too weak. 201616 trivial. 0 not checked. [2021-11-20 06:57:24,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:24,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129863490] [2021-11-20 06:57:24,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129863490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:57:24,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345274915] [2021-11-20 06:57:24,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:57:24,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:24,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:24,709 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:24,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:57:31,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-11-20 06:57:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:57:31,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:57:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 476504 backedges. 104361 proven. 4806 refuted. 0 times theorem prover too weak. 367337 trivial. 0 not checked. [2021-11-20 06:57:35,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 476504 backedges. 104236 proven. 4931 refuted. 0 times theorem prover too weak. 367337 trivial. 0 not checked. [2021-11-20 06:57:39,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345274915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:57:39,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:57:39,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30, 30] total 93 [2021-11-20 06:57:39,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038174521] [2021-11-20 06:57:39,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:39,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-20 06:57:39,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:39,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-20 06:57:39,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1638, Invalid=6918, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 06:57:39,929 INFO L87 Difference]: Start difference. First operand 3135 states and 3295 transitions. Second operand has 93 states, 93 states have (on average 5.89247311827957) internal successors, (548), 93 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:58,937 INFO L93 Difference]: Finished difference Result 6553 states and 6935 transitions. [2021-11-20 06:57:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 360 states. [2021-11-20 06:57:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 5.89247311827957) internal successors, (548), 93 states have internal predecessors, (548), 0 states have call successors, (0), 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 2367 [2021-11-20 06:57:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:58,960 INFO L225 Difference]: With dead ends: 6553 [2021-11-20 06:57:58,960 INFO L226 Difference]: Without dead ends: 6553 [2021-11-20 06:57:58,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5124 GetRequests, 4677 SyntacticMatches, 0 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67400 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=37980, Invalid=163172, Unknown=0, NotChecked=0, Total=201152 [2021-11-20 06:57:58,968 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4528 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 1040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4528 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1040 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:58,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4528 Valid, 368 Invalid, 4761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1040 Valid, 3721 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:57:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2021-11-20 06:57:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 3925. [2021-11-20 06:57:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 1.0537716615698267) internal successors, (4135), 3924 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 4135 transitions. [2021-11-20 06:57:59,038 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 4135 transitions. Word has length 2367 [2021-11-20 06:57:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:59,039 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 4135 transitions. [2021-11-20 06:57:59,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 5.89247311827957) internal successors, (548), 93 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:57:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 4135 transitions. [2021-11-20 06:57:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2553 [2021-11-20 06:57:59,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:59,093 INFO L514 BasicCegarLoop]: trace histogram [467, 466, 466, 466, 466, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 06:57:59,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:59,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:59,305 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:57:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -646221093, now seen corresponding path program 19 times [2021-11-20 06:57:59,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:59,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493733862] [2021-11-20 06:57:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:59,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 560420 backedges. 315078 proven. 15843 refuted. 0 times theorem prover too weak. 229499 trivial. 0 not checked. [2021-11-20 06:58:02,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493733862] [2021-11-20 06:58:02,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493733862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995358678] [2021-11-20 06:58:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:58:02,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:02,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:02,900 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:02,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:58:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 6565 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:58:03,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 560420 backedges. 316864 proven. 14057 refuted. 0 times theorem prover too weak. 229499 trivial. 0 not checked. [2021-11-20 06:58:08,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 560420 backedges. 316864 proven. 14057 refuted. 0 times theorem prover too weak. 229499 trivial. 0 not checked. [2021-11-20 06:58:12,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995358678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:12,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:12,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 57 [2021-11-20 06:58:12,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322530316] [2021-11-20 06:58:12,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:12,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 06:58:12,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 06:58:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=2431, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 06:58:12,530 INFO L87 Difference]: Start difference. First operand 3925 states and 4135 transitions. Second operand has 57 states, 57 states have (on average 7.017543859649122) internal successors, (400), 57 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:16,855 INFO L93 Difference]: Finished difference Result 3925 states and 4113 transitions. [2021-11-20 06:58:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-20 06:58:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 7.017543859649122) internal successors, (400), 57 states have internal predecessors, (400), 0 states have call successors, (0), 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 2552 [2021-11-20 06:58:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:16,875 INFO L225 Difference]: With dead ends: 3925 [2021-11-20 06:58:16,876 INFO L226 Difference]: Without dead ends: 3925 [2021-11-20 06:58:16,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5310 GetRequests, 5084 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17085 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=14574, Invalid=37182, Unknown=0, NotChecked=0, Total=51756 [2021-11-20 06:58:16,882 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 177 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:16,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 473 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:58:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-11-20 06:58:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3925. [2021-11-20 06:58:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 1.048165137614679) internal successors, (4113), 3924 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 4113 transitions. [2021-11-20 06:58:16,938 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 4113 transitions. Word has length 2552 [2021-11-20 06:58:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:16,940 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 4113 transitions. [2021-11-20 06:58:16,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 7.017543859649122) internal successors, (400), 57 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 4113 transitions. [2021-11-20 06:58:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2613 [2021-11-20 06:58:17,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:17,022 INFO L514 BasicCegarLoop]: trace histogram [479, 478, 478, 478, 478, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 06:58:17,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:17,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:17,236 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:58:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:17,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1941804725, now seen corresponding path program 20 times [2021-11-20 06:58:17,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:17,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986772215] [2021-11-20 06:58:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:17,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 589106 backedges. 351010 proven. 18569 refuted. 0 times theorem prover too weak. 219527 trivial. 0 not checked. [2021-11-20 06:58:20,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986772215] [2021-11-20 06:58:20,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986772215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:20,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085343026] [2021-11-20 06:58:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:58:20,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:20,676 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:20,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:58:21,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:58:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 6709 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:58:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 589106 backedges. 353003 proven. 16576 refuted. 0 times theorem prover too weak. 219527 trivial. 0 not checked. [2021-11-20 06:58:26,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 589106 backedges. 353003 proven. 16576 refuted. 0 times theorem prover too weak. 219527 trivial. 0 not checked. [2021-11-20 06:58:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085343026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:30,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:30,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 60 [2021-11-20 06:58:30,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476857894] [2021-11-20 06:58:30,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:30,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 06:58:30,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 06:58:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=841, Invalid=2699, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 06:58:30,486 INFO L87 Difference]: Start difference. First operand 3925 states and 4113 transitions. Second operand has 60 states, 60 states have (on average 7.033333333333333) internal successors, (422), 60 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:35,449 INFO L93 Difference]: Finished difference Result 3925 states and 4092 transitions. [2021-11-20 06:58:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-11-20 06:58:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 7.033333333333333) internal successors, (422), 60 states have internal predecessors, (422), 0 states have call successors, (0), 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 2612 [2021-11-20 06:58:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:35,457 INFO L225 Difference]: With dead ends: 3925 [2021-11-20 06:58:35,457 INFO L226 Difference]: Without dead ends: 3925 [2021-11-20 06:58:35,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5451 GetRequests, 5203 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20860 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17641, Invalid=44609, Unknown=0, NotChecked=0, Total=62250 [2021-11-20 06:58:35,462 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 185 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:35,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 390 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2046 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:58:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-11-20 06:58:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3925. [2021-11-20 06:58:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 1.0428134556574924) internal successors, (4092), 3924 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 4092 transitions. [2021-11-20 06:58:35,499 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 4092 transitions. Word has length 2612 [2021-11-20 06:58:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:35,501 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 4092 transitions. [2021-11-20 06:58:35,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 7.033333333333333) internal successors, (422), 60 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:58:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 4092 transitions. [2021-11-20 06:58:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2668 [2021-11-20 06:58:35,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:35,559 INFO L514 BasicCegarLoop]: trace histogram [490, 489, 489, 489, 489, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 06:58:35,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:35,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:58:35,784 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:58:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1712966644, now seen corresponding path program 21 times [2021-11-20 06:58:35,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071685703] [2021-11-20 06:58:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:35,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 616034 backedges. 387376 proven. 21589 refuted. 0 times theorem prover too weak. 207069 trivial. 0 not checked. [2021-11-20 06:58:39,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071685703] [2021-11-20 06:58:39,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071685703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949418508] [2021-11-20 06:58:39,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:58:39,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:39,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:39,113 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:39,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:58:42,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-11-20 06:58:42,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:58:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 616034 backedges. 238755 proven. 34500 refuted. 0 times theorem prover too weak. 342779 trivial. 0 not checked. [2021-11-20 06:58:47,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 616034 backedges. 238630 proven. 34625 refuted. 0 times theorem prover too weak. 342779 trivial. 0 not checked. [2021-11-20 06:58:52,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949418508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:52,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:58:52,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 30, 30] total 99 [2021-11-20 06:58:52,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100920316] [2021-11-20 06:58:52,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:52,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-20 06:58:52,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-20 06:58:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1683, Invalid=8019, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 06:58:52,295 INFO L87 Difference]: Start difference. First operand 3925 states and 4092 transitions. Second operand has 99 states, 99 states have (on average 6.474747474747475) internal successors, (641), 99 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:32,471 INFO L93 Difference]: Finished difference Result 6608 states and 6948 transitions. [2021-11-20 06:59:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 568 states. [2021-11-20 06:59:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 6.474747474747475) internal successors, (641), 99 states have internal predecessors, (641), 0 states have call successors, (0), 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 2667 [2021-11-20 06:59:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:32,483 INFO L225 Difference]: With dead ends: 6608 [2021-11-20 06:59:32,483 INFO L226 Difference]: Without dead ends: 6608 [2021-11-20 06:59:32,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5938 GetRequests, 5277 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168200 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=79329, Invalid=359577, Unknown=0, NotChecked=0, Total=438906 [2021-11-20 06:59:32,509 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10094 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 5022 mSolverCounterSat, 2541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10094 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 7563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2541 IncrementalHoareTripleChecker+Valid, 5022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:32,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10094 Valid, 521 Invalid, 7563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2541 Valid, 5022 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:59:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-11-20 06:59:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 4623. [2021-11-20 06:59:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 1.043920380787538) internal successors, (4825), 4622 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 4825 transitions. [2021-11-20 06:59:32,567 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 4825 transitions. Word has length 2667 [2021-11-20 06:59:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:32,569 INFO L470 AbstractCegarLoop]: Abstraction has 4623 states and 4825 transitions. [2021-11-20 06:59:32,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 6.474747474747475) internal successors, (641), 99 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:59:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 4825 transitions. [2021-11-20 06:59:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2823 [2021-11-20 06:59:32,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:32,676 INFO L514 BasicCegarLoop]: trace histogram [521, 520, 520, 520, 520, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 06:59:32,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:32,892 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 06:59:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 35994475, now seen corresponding path program 22 times [2021-11-20 06:59:32,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:32,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351776092] [2021-11-20 06:59:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:32,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 695177 backedges. 448180 proven. 24918 refuted. 0 times theorem prover too weak. 222079 trivial. 0 not checked. [2021-11-20 06:59:35,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351776092] [2021-11-20 06:59:35,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351776092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398518365] [2021-11-20 06:59:35,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:59:35,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:35,538 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:35,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:01:09,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:01:09,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 7213 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 07:01:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 695177 backedges. 595709 proven. 61007 refuted. 0 times theorem prover too weak. 38461 trivial. 0 not checked. [2021-11-20 07:01:17,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 695177 backedges. 595709 proven. 61007 refuted. 0 times theorem prover too weak. 38461 trivial. 0 not checked. [2021-11-20 07:01:25,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398518365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:25,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:01:25,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 61, 61] total 93 [2021-11-20 07:01:25,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88919410] [2021-11-20 07:01:25,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:25,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-20 07:01:25,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-20 07:01:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1946, Invalid=6610, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 07:01:25,576 INFO L87 Difference]: Start difference. First operand 4623 states and 4825 transitions. Second operand has 93 states, 93 states have (on average 7.139784946236559) internal successors, (664), 93 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:01:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:42,624 INFO L93 Difference]: Finished difference Result 3185 states and 3194 transitions. [2021-11-20 07:01:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 496 states. [2021-11-20 07:01:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 7.139784946236559) internal successors, (664), 93 states have internal predecessors, (664), 0 states have call successors, (0), 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 2822 [2021-11-20 07:01:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:42,633 INFO L225 Difference]: With dead ends: 3185 [2021-11-20 07:01:42,633 INFO L226 Difference]: Without dead ends: 3185 [2021-11-20 07:01:42,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6150 GetRequests, 5594 SyntacticMatches, 0 SemanticMatches, 556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120517 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=92279, Invalid=218527, Unknown=0, NotChecked=0, Total=310806 [2021-11-20 07:01:42,650 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 275 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 5024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:42,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 941 Invalid, 5024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:01:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-11-20 07:01:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 3185. [2021-11-20 07:01:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.0031407035175879) internal successors, (3194), 3184 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:01:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3194 transitions. [2021-11-20 07:01:42,677 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3194 transitions. Word has length 2822 [2021-11-20 07:01:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:42,678 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 3194 transitions. [2021-11-20 07:01:42,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 7.139784946236559) internal successors, (664), 93 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:01:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3194 transitions. [2021-11-20 07:01:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3013 [2021-11-20 07:01:42,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:42,794 INFO L514 BasicCegarLoop]: trace histogram [559, 558, 558, 558, 558, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-20 07:01:42,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-20 07:01:42,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:42,994 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-20 07:01:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash 654542099, now seen corresponding path program 23 times [2021-11-20 07:01:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:42,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064660167] [2021-11-20 07:01:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:42,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 798746 backedges. 687025 proven. 78503 refuted. 0 times theorem prover too weak. 33218 trivial. 0 not checked. [2021-11-20 07:01:47,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064660167] [2021-11-20 07:01:47,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064660167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498828245] [2021-11-20 07:01:47,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:01:47,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:47,397 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:47,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0d8f3aa-1ffa-450a-a334-d0108be8f1dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:07:09,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2021-11-20 07:07:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:07:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 7292 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 07:07:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates...