./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:46:39,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:46:39,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:46:39,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:46:39,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:46:39,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:46:39,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:46:39,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:46:39,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:46:39,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:46:39,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:46:39,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:46:39,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:46:39,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:46:39,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:46:39,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:46:39,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:46:39,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:46:39,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:46:39,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:46:39,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:46:39,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:46:39,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:46:39,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:46:39,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:46:39,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:46:39,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:46:39,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:46:39,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:46:39,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:46:39,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:46:39,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:46:39,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:46:39,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:46:39,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:46:39,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:46:39,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:46:39,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:46:39,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:46:39,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:46:39,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:46:39,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:46:39,653 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:46:39,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:46:39,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:46:39,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:46:39,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:46:39,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:46:39,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:46:39,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:46:39,662 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:46:39,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:46:39,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:46:39,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:46:39,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:46:39,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:46:39,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:46:39,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:46:39,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:46:39,665 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:46:39,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:46:39,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:46:39,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:46:39,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:46:39,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:46:39,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:46:39,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:39,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:46:39,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:46:39,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:46:39,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:46:39,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:46:39,669 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:46:39,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:46:39,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:46:39,670 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_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2022-11-18 18:46:39,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:46:39,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:46:39,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:46:39,984 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:46:39,986 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:46:39,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-11-18 18:46:40,083 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/data/124846b4b/af6a876a1b2b44ed89e3955905c5b5f0/FLAG60cd55943 [2022-11-18 18:46:40,694 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:46:40,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-11-18 18:46:40,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/data/124846b4b/af6a876a1b2b44ed89e3955905c5b5f0/FLAG60cd55943 [2022-11-18 18:46:41,085 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/data/124846b4b/af6a876a1b2b44ed89e3955905c5b5f0 [2022-11-18 18:46:41,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:46:41,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:46:41,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:41,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:46:41,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:46:41,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33212a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41, skipping insertion in model container [2022-11-18 18:46:41,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:46:41,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:46:41,310 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-11-18 18:46:41,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:41,361 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:46:41,374 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-11-18 18:46:41,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:41,398 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:46:41,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41 WrapperNode [2022-11-18 18:46:41,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:41,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:41,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:46:41,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:46:41,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,436 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-11-18 18:46:41,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:41,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:46:41,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:46:41,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:46:41,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,464 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:46:41,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:46:41,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:46:41,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:46:41,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (1/1) ... [2022-11-18 18:46:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:41,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:46:41,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:46:41,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:46:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:46:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:46:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:46:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:46:41,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:46:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:46:41,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:46:41,648 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:46:41,650 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:46:41,793 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:46:41,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:46:41,801 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:46:41,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:41 BoogieIcfgContainer [2022-11-18 18:46:41,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:46:41,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:46:41,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:46:41,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:46:41,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:46:41" (1/3) ... [2022-11-18 18:46:41,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ab90c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:41, skipping insertion in model container [2022-11-18 18:46:41,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:41" (2/3) ... [2022-11-18 18:46:41,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ab90c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:41, skipping insertion in model container [2022-11-18 18:46:41,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:41" (3/3) ... [2022-11-18 18:46:41,823 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2022-11-18 18:46:41,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:46:41,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:46:41,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:46:41,927 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7107e368, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:46:41,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:46:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2022-11-18 18:46:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:46:41,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:41,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:41,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2022-11-18 18:46:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913561372] [2022-11-18 18:46:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:42,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:42,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913561372] [2022-11-18 18:46:42,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913561372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:42,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:42,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:46:42,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519382228] [2022-11-18 18:46:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:42,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:46:42,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:42,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:46:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:46:42,261 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-18 18:46:42,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:42,281 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-11-18 18:46:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:46:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-18 18:46:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:42,296 INFO L225 Difference]: With dead ends: 27 [2022-11-18 18:46:42,297 INFO L226 Difference]: Without dead ends: 12 [2022-11-18 18:46:42,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:46:42,306 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:42,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:46:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-18 18:46:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-18 18:46:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-18 18:46:42,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2022-11-18 18:46:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:42,357 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-18 18:46:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-18 18:46:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-18 18:46:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:46:42,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:42,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:42,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:46:42,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2022-11-18 18:46:42,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:42,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505859743] [2022-11-18 18:46:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:42,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:42,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505859743] [2022-11-18 18:46:42,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505859743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:42,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:42,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:42,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624162271] [2022-11-18 18:46:42,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:42,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:42,597 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2022-11-18 18:46:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:42,667 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-18 18:46:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2022-11-18 18:46:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:42,669 INFO L225 Difference]: With dead ends: 29 [2022-11-18 18:46:42,670 INFO L226 Difference]: Without dead ends: 22 [2022-11-18 18:46:42,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:42,687 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-18 18:46:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2022-11-18 18:46:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-18 18:46:42,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-18 18:46:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:42,722 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-18 18:46:42,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2022-11-18 18:46:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-18 18:46:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 18:46:42,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:42,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:46:42,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2022-11-18 18:46:42,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:42,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469878600] [2022-11-18 18:46:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:42,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:42,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469878600] [2022-11-18 18:46:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469878600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:42,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:42,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:42,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744558907] [2022-11-18 18:46:42,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:42,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:42,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:42,872 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:42,908 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-18 18:46:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 18:46:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:42,910 INFO L225 Difference]: With dead ends: 23 [2022-11-18 18:46:42,910 INFO L226 Difference]: Without dead ends: 15 [2022-11-18 18:46:42,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:42,913 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:42,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:46:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-18 18:46:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-18 18:46:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-18 18:46:42,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-18 18:46:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:42,921 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-18 18:46:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-18 18:46:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:46:42,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:42,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:42,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:46:42,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2022-11-18 18:46:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:42,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987403654] [2022-11-18 18:46:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:43,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987403654] [2022-11-18 18:46:43,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987403654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:43,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381129608] [2022-11-18 18:46:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:43,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:43,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:46:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:46:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:43,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:43,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381129608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:43,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:43,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-11-18 18:46:43,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163970379] [2022-11-18 18:46:43,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:43,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:46:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:46:43,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:43,447 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-18 18:46:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:43,616 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-18 18:46:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:46:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 10 [2022-11-18 18:46:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:43,618 INFO L225 Difference]: With dead ends: 45 [2022-11-18 18:46:43,621 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 18:46:43,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:46:43,624 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 108 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:43,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 57 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 18:46:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-11-18 18:46:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2022-11-18 18:46:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-18 18:46:43,630 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-11-18 18:46:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:43,631 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-18 18:46:43,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-18 18:46:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-18 18:46:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:46:43,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:43,632 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:43,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 18:46:43,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:43,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2022-11-18 18:46:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:43,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546144447] [2022-11-18 18:46:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546144447] [2022-11-18 18:46:44,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546144447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567577328] [2022-11-18 18:46:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:44,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:44,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:44,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:46:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:46:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:44,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:44,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567577328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:44,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:44,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-18 18:46:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335705615] [2022-11-18 18:46:44,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:46:44,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:46:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:46:44,264 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:44,355 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-18 18:46:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:46:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:46:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:44,358 INFO L225 Difference]: With dead ends: 39 [2022-11-18 18:46:44,358 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 18:46:44,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:44,361 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:44,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 18:46:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-18 18:46:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-18 18:46:44,378 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2022-11-18 18:46:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:44,378 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-18 18:46:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-18 18:46:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 18:46:44,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:44,381 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:44,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:44,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:44,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1859381769, now seen corresponding path program 2 times [2022-11-18 18:46:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:44,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465458643] [2022-11-18 18:46:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:44,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:44,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465458643] [2022-11-18 18:46:44,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465458643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:44,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595825503] [2022-11-18 18:46:44,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:44,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:44,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:44,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:46:44,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:46:44,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:44,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:46:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:45,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:45,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595825503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:45,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:45,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-18 18:46:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369320371] [2022-11-18 18:46:45,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:45,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 18:46:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 18:46:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:46:45,164 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:45,395 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-11-18 18:46:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:46:45,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 18:46:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:45,397 INFO L225 Difference]: With dead ends: 102 [2022-11-18 18:46:45,398 INFO L226 Difference]: Without dead ends: 95 [2022-11-18 18:46:45,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:46:45,399 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 344 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:45,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-18 18:46:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-11-18 18:46:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-18 18:46:45,408 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 22 [2022-11-18 18:46:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-18 18:46:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-18 18:46:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:46:45,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:45,410 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:45,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:45,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:46:45,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:45,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1855888886, now seen corresponding path program 2 times [2022-11-18 18:46:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:45,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000057694] [2022-11-18 18:46:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:46,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000057694] [2022-11-18 18:46:46,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000057694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941080720] [2022-11-18 18:46:46,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:46,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:46,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:46,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:46,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:46:46,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:46:46,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:46:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:46,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:46:46,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 18:46:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:47,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-18 18:46:47,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 18:46:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:47,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941080720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:47,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:47,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-11-18 18:46:47,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907170363] [2022-11-18 18:46:47,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:47,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 18:46:47,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 18:46:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:46:47,601 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 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) [2022-11-18 18:46:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:48,053 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-11-18 18:46:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:46:48,059 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:46:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:48,063 INFO L225 Difference]: With dead ends: 61 [2022-11-18 18:46:48,063 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 18:46:48,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 18:46:48,067 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:48,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:46:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 18:46:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-11-18 18:46:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-18 18:46:48,086 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 23 [2022-11-18 18:46:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:48,087 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-18 18:46:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 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) [2022-11-18 18:46:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-18 18:46:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:46:48,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:48,089 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:48,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:48,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:48,295 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -954451792, now seen corresponding path program 3 times [2022-11-18 18:46:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:48,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395560509] [2022-11-18 18:46:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:48,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:48,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395560509] [2022-11-18 18:46:48,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395560509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:48,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784707929] [2022-11-18 18:46:48,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:46:48,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:48,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:48,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:49,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:46:49,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 18:46:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:49,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 18:46:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:49,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:46:49,397 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 18:46:49,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 18:46:49,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 18:46:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:49,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:49,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-18 18:46:49,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-18 18:46:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:50,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784707929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:50,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:50,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-18 18:46:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139727882] [2022-11-18 18:46:50,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 18:46:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 18:46:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-18 18:46:50,217 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:50,475 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-11-18 18:46:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:46:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 18:46:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:50,479 INFO L225 Difference]: With dead ends: 58 [2022-11-18 18:46:50,479 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 18:46:50,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 18:46:50,481 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:50,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 104 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 226 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-11-18 18:46:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 18:46:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2022-11-18 18:46:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-18 18:46:50,499 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2022-11-18 18:46:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:50,500 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-18 18:46:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-18 18:46:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:46:50,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:50,501 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:50,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:50,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 1 times [2022-11-18 18:46:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:50,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200858600] [2022-11-18 18:46:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200858600] [2022-11-18 18:46:50,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200858600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307039930] [2022-11-18 18:46:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:50,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:50,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:50,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:46:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:46:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:50,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:51,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307039930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:51,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:51,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-11-18 18:46:51,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187490720] [2022-11-18 18:46:51,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:51,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:46:51,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:46:51,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:51,086 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2022-11-18 18:46:51,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:51,150 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-11-18 18:46:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:46:51,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) Word has length 27 [2022-11-18 18:46:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:51,151 INFO L225 Difference]: With dead ends: 61 [2022-11-18 18:46:51,152 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 18:46:51,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:46:51,153 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:51,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 54 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:46:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 18:46:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 18:46:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-18 18:46:51,161 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 27 [2022-11-18 18:46:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:51,162 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-18 18:46:51,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2022-11-18 18:46:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-18 18:46:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 18:46:51,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:51,163 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:51,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:51,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:51,369 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2016089162, now seen corresponding path program 4 times [2022-11-18 18:46:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:51,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221045869] [2022-11-18 18:46:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:51,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221045869] [2022-11-18 18:46:52,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221045869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15719085] [2022-11-18 18:46:52,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:46:52,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:52,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:52,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:52,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:46:52,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:46:52,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:52,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 18:46:52,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:52,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:46:52,572 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:46:52,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:46:52,639 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:46:52,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:46:52,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 18:46:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:52,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:53,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-18 18:46:53,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-18 18:46:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:46:53,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15719085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:53,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:53,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-11-18 18:46:53,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992173688] [2022-11-18 18:46:53,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:53,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 18:46:53,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 18:46:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 18:46:53,694 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:54,121 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-11-18 18:46:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:46:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-18 18:46:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:54,122 INFO L225 Difference]: With dead ends: 56 [2022-11-18 18:46:54,123 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 18:46:54,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:46:54,124 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:54,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 87 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 380 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2022-11-18 18:46:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 18:46:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-11-18 18:46:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 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) [2022-11-18 18:46:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-18 18:46:54,135 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 29 [2022-11-18 18:46:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:54,136 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-18 18:46:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-18 18:46:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 18:46:54,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:54,137 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:54,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:46:54,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash 13772134, now seen corresponding path program 2 times [2022-11-18 18:46:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133993332] [2022-11-18 18:46:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133993332] [2022-11-18 18:46:55,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133993332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155879325] [2022-11-18 18:46:55,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:46:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:55,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:55,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:46:55,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:46:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:55,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 18:46:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:55,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:46:55,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-18 18:46:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:56,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:46:56,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:56,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 17 [2022-11-18 18:46:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:56,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:58,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 18:46:58,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 74 [2022-11-18 18:46:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:59,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155879325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:59,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 49 [2022-11-18 18:46:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396528804] [2022-11-18 18:46:59,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:59,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 18:46:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 18:46:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1905, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 18:46:59,301 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:59,894 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-18 18:46:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:46:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-18 18:46:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:59,895 INFO L225 Difference]: With dead ends: 67 [2022-11-18 18:46:59,895 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 18:46:59,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=531, Invalid=2661, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 18:46:59,898 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:59,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 77 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 304 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-11-18 18:46:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 18:46:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-11-18 18:46:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-11-18 18:46:59,915 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2022-11-18 18:46:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:59,916 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-11-18 18:46:59,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-11-18 18:46:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 18:46:59,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:59,918 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:59,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:00,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:00,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash -499327066, now seen corresponding path program 3 times [2022-11-18 18:47:00,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:00,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108574889] [2022-11-18 18:47:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:00,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:00,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108574889] [2022-11-18 18:47:01,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108574889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701239566] [2022-11-18 18:47:01,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:01,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:01,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:47:01,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 18:47:01,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 18:47:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:01,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:01,430 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:47:01,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:47:01,498 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:47:01,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:47:01,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 18:47:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:01,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:04,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-18 18:47:04,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-18 18:47:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:47:04,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701239566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:04,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:04,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 40 [2022-11-18 18:47:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093915135] [2022-11-18 18:47:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 18:47:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 18:47:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1417, Unknown=2, NotChecked=0, Total=1560 [2022-11-18 18:47:04,628 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-11-18 18:47:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:05,546 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-11-18 18:47:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:47:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 36 [2022-11-18 18:47:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:05,548 INFO L225 Difference]: With dead ends: 81 [2022-11-18 18:47:05,548 INFO L226 Difference]: Without dead ends: 79 [2022-11-18 18:47:05,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=328, Invalid=2426, Unknown=2, NotChecked=0, Total=2756 [2022-11-18 18:47:05,550 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:05,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 195 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 654 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2022-11-18 18:47:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-18 18:47:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-11-18 18:47:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 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) [2022-11-18 18:47:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-11-18 18:47:05,562 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 36 [2022-11-18 18:47:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:05,563 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-11-18 18:47:05,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-11-18 18:47:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-11-18 18:47:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 18:47:05,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:05,564 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:05,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:05,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:47:05,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1000805410, now seen corresponding path program 4 times [2022-11-18 18:47:05,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:05,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335544892] [2022-11-18 18:47:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:06,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335544892] [2022-11-18 18:47:06,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335544892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:06,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215539041] [2022-11-18 18:47:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:06,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:06,493 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:06,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:47:06,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 18:47:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:07,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:07,614 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 18:47:07,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-18 18:47:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:07,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:08,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 18:47:08,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-18 18:47:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:09,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215539041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:09,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:09,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 55 [2022-11-18 18:47:09,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878293108] [2022-11-18 18:47:09,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:09,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 18:47:09,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 18:47:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 18:47:09,115 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 55 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:09,859 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-11-18 18:47:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 18:47:09,860 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 55 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-18 18:47:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:09,861 INFO L225 Difference]: With dead ends: 80 [2022-11-18 18:47:09,861 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 18:47:09,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 18:47:09,865 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:09,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 161 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 433 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-18 18:47:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 18:47:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-18 18:47:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-11-18 18:47:09,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-11-18 18:47:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:09,877 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-11-18 18:47:09,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 55 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-11-18 18:47:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 18:47:09,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:09,879 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:09,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 18:47:10,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:47:10,085 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1128636068, now seen corresponding path program 5 times [2022-11-18 18:47:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:10,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141589672] [2022-11-18 18:47:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141589672] [2022-11-18 18:47:10,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141589672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293235571] [2022-11-18 18:47:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:47:10,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:10,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:10,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:10,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:47:11,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-18 18:47:11,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:47:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:11,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:11,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:47:12,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 18:47:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:12,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:15,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-18 18:47:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-18 18:47:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:16,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293235571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:16,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:16,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 60 [2022-11-18 18:47:16,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252197342] [2022-11-18 18:47:16,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:16,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 18:47:16,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 18:47:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3295, Unknown=2, NotChecked=0, Total=3540 [2022-11-18 18:47:16,216 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 60 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:17,283 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-11-18 18:47:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:47:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 60 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-18 18:47:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:17,284 INFO L225 Difference]: With dead ends: 61 [2022-11-18 18:47:17,284 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 18:47:17,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=418, Invalid=4836, Unknown=2, NotChecked=0, Total=5256 [2022-11-18 18:47:17,287 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:17,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 183 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 767 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-11-18 18:47:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 18:47:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-11-18 18:47:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-11-18 18:47:17,306 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 40 [2022-11-18 18:47:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:17,308 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-11-18 18:47:17,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 60 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-11-18 18:47:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 18:47:17,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:17,309 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:17,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 18:47:17,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:17,515 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 882120722, now seen corresponding path program 6 times [2022-11-18 18:47:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:17,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219198555] [2022-11-18 18:47:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219198555] [2022-11-18 18:47:18,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219198555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124333389] [2022-11-18 18:47:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:47:18,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:18,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:47:18,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 18:47:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 18:47:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:19,936 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 18:47:19,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-18 18:47:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 14 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:19,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:20,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 18:47:20,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-18 18:47:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 11 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:21,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124333389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:21,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:21,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 64 [2022-11-18 18:47:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186995282] [2022-11-18 18:47:21,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 18:47:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 18:47:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3370, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 18:47:21,604 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:21,970 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-11-18 18:47:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 18:47:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-18 18:47:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:21,971 INFO L225 Difference]: With dead ends: 73 [2022-11-18 18:47:21,971 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 18:47:21,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=697, Invalid=3593, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:47:21,973 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:21,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 132 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 404 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-11-18 18:47:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 18:47:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-18 18:47:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 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) [2022-11-18 18:47:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-11-18 18:47:21,982 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 44 [2022-11-18 18:47:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:21,982 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-11-18 18:47:21,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-11-18 18:47:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 18:47:21,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:21,983 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:21,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:22,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:47:22,189 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash 732190104, now seen corresponding path program 7 times [2022-11-18 18:47:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:22,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487973239] [2022-11-18 18:47:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:23,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487973239] [2022-11-18 18:47:23,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487973239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203468039] [2022-11-18 18:47:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:47:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:23,214 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:47:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:47:23,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:24,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:24,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:24,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:47:24,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 18:47:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:25,558 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_163| Int)) (or (forall ((v_ArrVal_399 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_163| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_399) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_163|)))) is different from false [2022-11-18 18:47:25,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-18 18:47:25,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-18 18:47:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 18:47:26,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203468039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:26,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:26,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2022-11-18 18:47:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013507876] [2022-11-18 18:47:26,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-18 18:47:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-18 18:47:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4030, Unknown=1, NotChecked=128, Total=4422 [2022-11-18 18:47:26,513 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 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) [2022-11-18 18:47:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:27,766 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-11-18 18:47:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 18:47:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 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 47 [2022-11-18 18:47:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:27,767 INFO L225 Difference]: With dead ends: 65 [2022-11-18 18:47:27,767 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 18:47:27,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=402, Invalid=5607, Unknown=1, NotChecked=152, Total=6162 [2022-11-18 18:47:27,769 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 97 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:27,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 352 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1284 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-11-18 18:47:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 18:47:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-11-18 18:47:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 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) [2022-11-18 18:47:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-11-18 18:47:27,785 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 47 [2022-11-18 18:47:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:27,785 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-11-18 18:47:27,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 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) [2022-11-18 18:47:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-11-18 18:47:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 18:47:27,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:27,787 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:27,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:27,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:47:27,994 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2024902222, now seen corresponding path program 8 times [2022-11-18 18:47:27,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:27,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605848249] [2022-11-18 18:47:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:27,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605848249] [2022-11-18 18:47:29,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605848249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307149888] [2022-11-18 18:47:29,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:29,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:29,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:29,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:47:29,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:47:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:29,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:29,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 18:47:30,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:47:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:30,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:30,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 17 [2022-11-18 18:47:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:30,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:35,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 18:47:35,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 162 [2022-11-18 18:47:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 21 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:37,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307149888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:37,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:37,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 28] total 76 [2022-11-18 18:47:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382358512] [2022-11-18 18:47:37,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:37,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-18 18:47:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-18 18:47:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4796, Unknown=3, NotChecked=0, Total=5700 [2022-11-18 18:47:37,179 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 76 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 76 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:38,764 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2022-11-18 18:47:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 18:47:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 76 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-18 18:47:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:38,765 INFO L225 Difference]: With dead ends: 107 [2022-11-18 18:47:38,765 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 18:47:38,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1199, Invalid=7728, Unknown=3, NotChecked=0, Total=8930 [2022-11-18 18:47:38,768 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:38,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 173 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 552 Invalid, 0 Unknown, 204 Unchecked, 0.4s Time] [2022-11-18 18:47:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 18:47:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-18 18:47:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2022-11-18 18:47:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-11-18 18:47:38,781 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2022-11-18 18:47:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:38,781 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-11-18 18:47:38,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9473684210526316) internal successors, (148), 76 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-11-18 18:47:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 18:47:38,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:38,782 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:38,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:38,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:47:38,988 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:38,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1217248270, now seen corresponding path program 9 times [2022-11-18 18:47:38,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:38,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453902680] [2022-11-18 18:47:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:38,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453902680] [2022-11-18 18:47:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453902680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025376524] [2022-11-18 18:47:40,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:40,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:40,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:47:40,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-18 18:47:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:47:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:40,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:41,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-18 18:47:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:41,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:41,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 18:47:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:47:41,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:41,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 18:47:41,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:41,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-11-18 18:47:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 3 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:45,425 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 Int) (|v_ULTIMATE.start_main_~i~0#1_204| Int) (v_ArrVal_497 Int) (|v_ULTIMATE.start_main_~i~0#1_203| Int) (v_ArrVal_495 Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_495) (+ (* |v_ULTIMATE.start_main_~i~0#1_204| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_497) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_203| 4)) v_ArrVal_500))) (or (< |v_ULTIMATE.start_main_~i~0#1_203| 8) (< 0 (select .cse0 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_204|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_204| 1) |v_ULTIMATE.start_main_~i~0#1_203|)) (not (<= v_ArrVal_495 |c_ULTIMATE.start_main_~j~0#1|)) (< (select .cse0 (+ 32 |c_ULTIMATE.start_main_~#a~0#1.offset|)) 1)))) is different from false [2022-11-18 18:47:50,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2022-11-18 18:47:50,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:50,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2179 treesize of output 2147 [2022-11-18 18:47:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 1 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2022-11-18 18:47:52,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025376524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:52,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:52,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 27] total 75 [2022-11-18 18:47:52,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671033441] [2022-11-18 18:47:52,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:52,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 18:47:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 18:47:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=5009, Unknown=5, NotChecked=144, Total=5550 [2022-11-18 18:47:52,999 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 75 states, 75 states have (on average 2.2133333333333334) internal successors, (166), 75 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:56,843 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-11-18 18:47:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 18:47:56,844 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.2133333333333334) internal successors, (166), 75 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-18 18:47:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:56,844 INFO L225 Difference]: With dead ends: 69 [2022-11-18 18:47:56,844 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 18:47:56,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=898, Invalid=10443, Unknown=5, NotChecked=210, Total=11556 [2022-11-18 18:47:56,846 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:56,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 431 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1489 Invalid, 0 Unknown, 132 Unchecked, 1.0s Time] [2022-11-18 18:47:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 18:47:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-18 18:47:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2022-11-18 18:47:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-11-18 18:47:56,867 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2022-11-18 18:47:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:56,868 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-11-18 18:47:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.2133333333333334) internal successors, (166), 75 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-11-18 18:47:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 18:47:56,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:56,869 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:56,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:57,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:47:57,070 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1661548092, now seen corresponding path program 10 times [2022-11-18 18:47:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:57,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924998530] [2022-11-18 18:47:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924998530] [2022-11-18 18:47:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924998530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184365450] [2022-11-18 18:47:58,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:58,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:58,434 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:58,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4440db-dd79-4abf-af91-f175d4adf99c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:47:58,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 18:47:58,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:58,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:47:58,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2022-11-18 18:47:59,052 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:47:59,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-18 18:47:59,172 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:47:59,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 18:47:59,327 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:47:59,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 18:47:59,494 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:47:59,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 18:47:59,647 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-18 18:47:59,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-11-18 18:48:00,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:48:00,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-11-18 18:48:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:00,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:47,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 125 [2022-11-18 18:49:48,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:48,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168059231 treesize of output 167797079 [2022-11-18 18:58:49,166 WARN L233 SmtUtils]: Spent 9.01m on a formula simplification that was a NOOP. DAG size: 8833 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)