./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN --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 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 --- 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-6b4ec56 [2022-11-20 10:38:39,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:38:39,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:38:39,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:38:39,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:38:39,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:38:39,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:38:39,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:38:39,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:38:39,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:38:39,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:38:39,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:38:39,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:38:39,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:38:39,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:38:39,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:38:39,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:38:39,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:38:39,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:38:39,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:38:39,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:38:39,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:38:39,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:38:39,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:38:39,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:38:39,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:38:39,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:38:39,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:38:39,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:38:39,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:38:39,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:38:39,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:38:39,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:38:39,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:38:39,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:38:39,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:38:39,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:38:39,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:38:39,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:38:39,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:38:39,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:38:39,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:38:39,600 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:38:39,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:38:39,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:38:39,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:38:39,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:38:39,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:38:39,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:38:39,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:38:39,604 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:38:39,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:38:39,604 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:38:39,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:38:39,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:38:39,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:38:39,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:38:39,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:38:39,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:38:39,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:38:39,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:38:39,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:38:39,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:38:39,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:38:39,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:38:39,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:38:39,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:39,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:38:39,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:38:39,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:38:39,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:38:39,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:38:39,610 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:38:39,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:38:39,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:38:39,610 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_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 [2022-11-20 10:38:39,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:38:39,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:38:39,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:38:39,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:38:39,954 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:38:39,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2022-11-20 10:38:43,112 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:38:43,344 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:38:43,345 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/sv-benchmarks/c/array-fpi/ifeqn1.c [2022-11-20 10:38:43,351 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/data/3558c884b/84018cc175cc4cc5ba7bf0e69011af41/FLAGba27ec9e4 [2022-11-20 10:38:43,387 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/data/3558c884b/84018cc175cc4cc5ba7bf0e69011af41 [2022-11-20 10:38:43,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:38:43,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:38:43,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:43,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:38:43,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:38:43,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@209faa83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43, skipping insertion in model container [2022-11-20 10:38:43,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:38:43,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:38:43,613 WARN L237 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_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2022-11-20 10:38:43,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:43,642 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:38:43,654 WARN L237 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_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2022-11-20 10:38:43,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:43,677 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:38:43,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43 WrapperNode [2022-11-20 10:38:43,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:43,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:43,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:38:43,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:38:43,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,734 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-11-20 10:38:43,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:43,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:38:43,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:38:43,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:38:43,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:38:43,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:38:43,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:38:43,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:38:43,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (1/1) ... [2022-11-20 10:38:43,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:43,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:38:43,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:38:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:38:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:38:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:38:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:38:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:38:43,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:38:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:38:43,952 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:38:43,955 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:38:44,126 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:38:44,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:38:44,133 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:38:44,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:44 BoogieIcfgContainer [2022-11-20 10:38:44,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:38:44,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:38:44,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:38:44,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:38:44,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:38:43" (1/3) ... [2022-11-20 10:38:44,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea603ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:44, skipping insertion in model container [2022-11-20 10:38:44,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:43" (2/3) ... [2022-11-20 10:38:44,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea603ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:44, skipping insertion in model container [2022-11-20 10:38:44,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:44" (3/3) ... [2022-11-20 10:38:44,155 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2022-11-20 10:38:44,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:38:44,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:38:44,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:44,230 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;@617a9205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:44,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:38:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:38:44,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:44,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:44,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-11-20 10:38:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980655358] [2022-11-20 10:38:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:44,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980655358] [2022-11-20 10:38:44,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:38:44,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829568108] [2022-11-20 10:38:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:44,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:44,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:44,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:38:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 10:38:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:44,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:44,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829568108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:44,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:44,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631198356] [2022-11-20 10:38:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:44,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:44,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:44,689 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:44,704 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-20 10:38:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:38:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:44,714 INFO L225 Difference]: With dead ends: 42 [2022-11-20 10:38:44,714 INFO L226 Difference]: Without dead ends: 19 [2022-11-20 10:38:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:44,720 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-11-20 10:38:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-20 10:38:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-20 10:38:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-20 10:38:44,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-11-20 10:38:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:44,758 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-20 10:38:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-20 10:38:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:38:44,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:44,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:44,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:44,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:44,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-11-20 10:38:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072028009] [2022-11-20 10:38:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:44,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072028009] [2022-11-20 10:38:45,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:38:45,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241212915] [2022-11-20 10:38:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:45,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:45,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:45,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:38:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:38:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:45,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241212915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:45,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:45,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:38:45,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300951416] [2022-11-20 10:38:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:45,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:45,159 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:45,261 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-20 10:38:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:38:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:45,271 INFO L225 Difference]: With dead ends: 42 [2022-11-20 10:38:45,272 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 10:38:45,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:45,276 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:45,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 10:38:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2022-11-20 10:38:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2022-11-20 10:38:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-20 10:38:45,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-11-20 10:38:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:45,295 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-20 10:38:45,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-20 10:38:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:38:45,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:45,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:45,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:45,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:45,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-11-20 10:38:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:45,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559653576] [2022-11-20 10:38:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:45,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730646196] [2022-11-20 10:38:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:45,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:45,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:45,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:38:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:45,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:38:45,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:45,758 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 11 treesize of output 7 [2022-11-20 10:38:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:45,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:45,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559653576] [2022-11-20 10:38:45,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730646196] [2022-11-20 10:38:45,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730646196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:45,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:45,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:45,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296706164] [2022-11-20 10:38:45,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:45,855 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:45,964 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-20 10:38:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:38:45,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 10:38:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:45,965 INFO L225 Difference]: With dead ends: 38 [2022-11-20 10:38:45,966 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 10:38:45,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:38:45,967 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:45,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 10:38:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-20 10:38:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-20 10:38:45,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2022-11-20 10:38:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:45,975 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-20 10:38:45,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-20 10:38:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:38:45,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:45,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:45,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:46,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2022-11-20 10:38:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409641174] [2022-11-20 10:38:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409641174] [2022-11-20 10:38:46,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:38:46,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636969901] [2022-11-20 10:38:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:46,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:46,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:46,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:38:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:38:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:46,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636969901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:46,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88167201] [2022-11-20 10:38:46,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:46,378 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:46,438 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-11-20 10:38:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:46,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 10:38:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:46,440 INFO L225 Difference]: With dead ends: 55 [2022-11-20 10:38:46,440 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 10:38:46,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:46,442 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:46,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 10:38:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-11-20 10:38:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-20 10:38:46,449 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-11-20 10:38:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:46,449 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-20 10:38:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-20 10:38:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:38:46,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:46,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:46,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-20 10:38:46,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-11-20 10:38:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:46,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519766672] [2022-11-20 10:38:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:46,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:46,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745852048] [2022-11-20 10:38:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:46,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:46,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:38:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:38:46,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:46,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:46,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519766672] [2022-11-20 10:38:46,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745852048] [2022-11-20 10:38:46,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745852048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:46,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:46,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 10:38:46,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157337846] [2022-11-20 10:38:46,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:46,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:38:46,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:38:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:38:46,971 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:47,166 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-20 10:38:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:47,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 10:38:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:47,169 INFO L225 Difference]: With dead ends: 70 [2022-11-20 10:38:47,169 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 10:38:47,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:38:47,171 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:47,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 43 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 10:38:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-20 10:38:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-20 10:38:47,182 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-11-20 10:38:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:47,182 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-20 10:38:47,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-20 10:38:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:38:47,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:47,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:47,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:47,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:47,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-11-20 10:38:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:47,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464789205] [2022-11-20 10:38:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:47,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:47,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:47,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290051793] [2022-11-20 10:38:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:47,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:47,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:47,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:47,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:38:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:47,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 10:38:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:47,551 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 10 treesize of output 8 [2022-11-20 10:38:47,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:47,690 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 21 treesize of output 20 [2022-11-20 10:38:47,858 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 19 treesize of output 18 [2022-11-20 10:38:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:47,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 10:38:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:48,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:38:48,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:48,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464789205] [2022-11-20 10:38:48,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:48,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290051793] [2022-11-20 10:38:48,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290051793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:48,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:48,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2022-11-20 10:38:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476498545] [2022-11-20 10:38:48,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:48,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:38:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:38:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:38:48,477 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:48,618 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2022-11-20 10:38:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:38:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 10:38:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:48,621 INFO L225 Difference]: With dead ends: 76 [2022-11-20 10:38:48,622 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 10:38:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:38:48,623 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:48,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-11-20 10:38:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 10:38:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-11-20 10:38:48,636 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) [2022-11-20 10:38:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-20 10:38:48,637 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 24 [2022-11-20 10:38:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:48,638 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-20 10:38:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-20 10:38:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 10:38:48,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:48,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:48,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:48,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:48,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash -672376363, now seen corresponding path program 2 times [2022-11-20 10:38:48,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:48,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621431188] [2022-11-20 10:38:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:48,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:48,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:48,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544226702] [2022-11-20 10:38:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:48,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:48,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:48,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:38:48,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:48,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:38:48,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:49,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:49,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621431188] [2022-11-20 10:38:49,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544226702] [2022-11-20 10:38:49,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544226702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:49,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:49,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 10:38:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919513908] [2022-11-20 10:38:49,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:49,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:38:49,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:38:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:38:49,156 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:49,374 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2022-11-20 10:38:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:38:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 10:38:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:49,376 INFO L225 Difference]: With dead ends: 117 [2022-11-20 10:38:49,376 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 10:38:49,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:38:49,377 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:49,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 70 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:38:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 10:38:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2022-11-20 10:38:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-11-20 10:38:49,402 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 27 [2022-11-20 10:38:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:49,403 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-11-20 10:38:49,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-11-20 10:38:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:38:49,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:49,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:49,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:49,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:49,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-11-20 10:38:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:49,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971504488] [2022-11-20 10:38:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:49,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249429849] [2022-11-20 10:38:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:49,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:49,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:49,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:49,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:38:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 10:38:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:49,829 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 10 treesize of output 8 [2022-11-20 10:38:49,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:49,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:38:50,032 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 19 treesize of output 18 [2022-11-20 10:38:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:50,133 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:38:50,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 32 [2022-11-20 10:38:50,375 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:38:50,375 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 56 treesize of output 32 [2022-11-20 10:38:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:50,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:51,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:51,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971504488] [2022-11-20 10:38:51,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:51,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249429849] [2022-11-20 10:38:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249429849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:51,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:51,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2022-11-20 10:38:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601013877] [2022-11-20 10:38:51,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:51,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:38:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:38:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:38:51,521 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:51,984 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-11-20 10:38:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:38:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 10:38:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:51,986 INFO L225 Difference]: With dead ends: 82 [2022-11-20 10:38:51,986 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 10:38:51,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:38:51,987 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:51,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-11-20 10:38:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 10:38:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-11-20 10:38:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-11-20 10:38:52,000 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 28 [2022-11-20 10:38:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:52,000 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-11-20 10:38:52,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-11-20 10:38:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:38:52,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:52,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:52,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:52,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:38:52,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1094218297, now seen corresponding path program 3 times [2022-11-20 10:38:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127532868] [2022-11-20 10:38:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:52,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:52,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605141699] [2022-11-20 10:38:52,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:52,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:52,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:52,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:38:52,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:38:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:38:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 10:38:52,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:38:52,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:52,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127532868] [2022-11-20 10:38:52,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:52,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605141699] [2022-11-20 10:38:52,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605141699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:52,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:52,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:38:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645072031] [2022-11-20 10:38:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:52,544 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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) [2022-11-20 10:38:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:52,594 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2022-11-20 10:38:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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 30 [2022-11-20 10:38:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:52,597 INFO L225 Difference]: With dead ends: 95 [2022-11-20 10:38:52,597 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 10:38:52,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:52,600 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:52,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 10:38:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-20 10:38:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-11-20 10:38:52,618 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 30 [2022-11-20 10:38:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:52,620 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-11-20 10:38:52,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 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) [2022-11-20 10:38:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-11-20 10:38:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:38:52,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:52,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:52,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:52,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:52,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1487245307, now seen corresponding path program 4 times [2022-11-20 10:38:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:52,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84128040] [2022-11-20 10:38:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:52,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147732300] [2022-11-20 10:38:52,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:52,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:52,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:52,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:38:53,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:53,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 10:38:53,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:53,141 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 11 treesize of output 7 [2022-11-20 10:38:53,200 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 57 treesize of output 50 [2022-11-20 10:38:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:53,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2022-11-20 10:38:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:53,281 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 21 treesize of output 20 [2022-11-20 10:38:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:38:53,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:53,755 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 32 treesize of output 30 [2022-11-20 10:38:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:38:53,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84128040] [2022-11-20 10:38:53,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147732300] [2022-11-20 10:38:53,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147732300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:53,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:53,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-20 10:38:53,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569307089] [2022-11-20 10:38:53,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:53,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:38:53,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:38:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:38:53,837 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:54,624 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-11-20 10:38:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:38:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 10:38:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:54,627 INFO L225 Difference]: With dead ends: 91 [2022-11-20 10:38:54,627 INFO L226 Difference]: Without dead ends: 89 [2022-11-20 10:38:54,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:38:54,628 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 247 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:54,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 98 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 160 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-20 10:38:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-20 10:38:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2022-11-20 10:38:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 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) [2022-11-20 10:38:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-11-20 10:38:54,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 30 [2022-11-20 10:38:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:54,647 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-11-20 10:38:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-11-20 10:38:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:38:54,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:54,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:54,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:54,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:38:54,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash 939270440, now seen corresponding path program 2 times [2022-11-20 10:38:54,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:54,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490928298] [2022-11-20 10:38:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:54,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:54,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:54,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491991648] [2022-11-20 10:38:54,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:54,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:54,876 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:54,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:38:54,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:54,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:38:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:55,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:55,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490928298] [2022-11-20 10:38:55,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:38:55,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491991648] [2022-11-20 10:38:55,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491991648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:55,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:55,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 10:38:55,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805806852] [2022-11-20 10:38:55,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:38:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:38:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:38:55,162 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:55,392 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-11-20 10:38:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:38:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 10:38:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:55,393 INFO L225 Difference]: With dead ends: 75 [2022-11-20 10:38:55,394 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 10:38:55,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:38:55,395 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:55,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 46 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 10:38:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2022-11-20 10:38:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-20 10:38:55,433 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 31 [2022-11-20 10:38:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-20 10:38:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-20 10:38:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 10:38:55,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:55,441 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:55,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:55,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:38:55,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-11-20 10:38:55,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:55,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459858635] [2022-11-20 10:38:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:55,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:55,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:38:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318580502] [2022-11-20 10:38:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:55,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:55,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:55,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:55,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:38:56,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:38:56,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:56,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 10:38:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:56,183 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 10 treesize of output 8 [2022-11-20 10:38:56,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:56,273 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 57 treesize of output 50 [2022-11-20 10:38:56,284 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-20 10:38:56,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 95 [2022-11-20 10:38:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:56,342 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-20 10:38:56,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 32 [2022-11-20 10:38:56,507 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 67 treesize of output 60 [2022-11-20 10:38:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:56,521 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-20 10:38:56,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 105 [2022-11-20 10:38:56,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 60 treesize of output 12 [2022-11-20 10:38:59,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2022-11-20 10:38:59,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 10:38:59,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 170 [2022-11-20 10:38:59,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:38:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:59,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:59,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:59,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-11-20 10:38:59,688 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 10:39:00,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 146 [2022-11-20 10:39:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 157 [2022-11-20 10:39:00,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:00,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 53 [2022-11-20 10:39:01,060 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:39:01,061 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 76 treesize of output 66 [2022-11-20 10:39:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:01,068 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 15 treesize of output 11 [2022-11-20 10:39:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 31 treesize of output 23 [2022-11-20 10:39:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:01,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459858635] [2022-11-20 10:39:04,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:39:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318580502] [2022-11-20 10:39:04,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318580502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:04,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:04,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2022-11-20 10:39:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487968253] [2022-11-20 10:39:04,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:04,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 10:39:04,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 10:39:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1503, Unknown=1, NotChecked=0, Total=1806 [2022-11-20 10:39:04,128 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 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) [2022-11-20 10:39:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:08,960 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2022-11-20 10:39:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 10:39:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 10:39:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:08,961 INFO L225 Difference]: With dead ends: 88 [2022-11-20 10:39:08,961 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 10:39:08,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=457, Invalid=2297, Unknown=2, NotChecked=0, Total=2756 [2022-11-20 10:39:08,963 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:08,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-11-20 10:39:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 10:39:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2022-11-20 10:39:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 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) [2022-11-20 10:39:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-11-20 10:39:08,979 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 34 [2022-11-20 10:39:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:08,979 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-11-20 10:39:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 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) [2022-11-20 10:39:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-11-20 10:39:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:39:08,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:08,980 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:08,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:39:09,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash 180276683, now seen corresponding path program 4 times [2022-11-20 10:39:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:09,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590574157] [2022-11-20 10:39:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:09,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:39:09,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797668110] [2022-11-20 10:39:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:39:09,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:09,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:09,226 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:09,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:39:09,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:39:09,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:09,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:39:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:39:09,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:39:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590574157] [2022-11-20 10:39:09,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:39:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797668110] [2022-11-20 10:39:09,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797668110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:09,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:09,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-20 10:39:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988549100] [2022-11-20 10:39:09,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:39:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:39:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:39:09,515 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:09,929 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2022-11-20 10:39:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:39:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 10:39:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:09,931 INFO L225 Difference]: With dead ends: 124 [2022-11-20 10:39:09,931 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 10:39:09,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:39:09,932 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 105 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:09,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 160 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:39:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 10:39:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 73. [2022-11-20 10:39:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 72 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-11-20 10:39:09,948 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 37 [2022-11-20 10:39:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:09,948 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-11-20 10:39:09,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-11-20 10:39:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:39:09,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:09,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:09,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:10,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:39:10,155 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-11-20 10:39:10,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:10,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880986606] [2022-11-20 10:39:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:10,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:10,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:39:10,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367649515] [2022-11-20 10:39:10,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:39:10,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:10,173 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:10,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:39:10,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:39:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 10:39:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:10,757 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 10 treesize of output 8 [2022-11-20 10:39:10,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:39:10,907 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 110 treesize of output 99 [2022-11-20 10:39:10,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:10,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:10,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:10,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-20 10:39:10,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:10,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:10,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 74 [2022-11-20 10:39:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 10:39:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 10:39:11,346 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:39:11,346 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 2 case distinctions, treesize of input 151 treesize of output 137 [2022-11-20 10:39:11,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:11,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-11-20 10:39:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 42 [2022-11-20 10:39:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:11,575 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 10:39:11,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2022-11-20 10:39:12,004 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 10:39:12,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 40 [2022-11-20 10:39:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:12,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880986606] [2022-11-20 10:39:22,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:39:22,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367649515] [2022-11-20 10:39:22,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367649515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:22,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:22,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-11-20 10:39:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770535948] [2022-11-20 10:39:22,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:22,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:39:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:39:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=837, Unknown=1, NotChecked=0, Total=992 [2022-11-20 10:39:22,819 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:34,668 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-11-20 10:39:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 10:39:34,669 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 10:39:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:34,670 INFO L225 Difference]: With dead ends: 110 [2022-11-20 10:39:34,670 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 10:39:34,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=314, Invalid=1755, Unknown=1, NotChecked=0, Total=2070 [2022-11-20 10:39:34,671 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:34,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 139 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 282 Invalid, 0 Unknown, 150 Unchecked, 1.6s Time] [2022-11-20 10:39:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 10:39:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2022-11-20 10:39:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-20 10:39:34,706 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 38 [2022-11-20 10:39:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:34,706 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-20 10:39:34,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-20 10:39:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:39:34,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:34,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:34,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:34,908 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2022-11-20 10:39:34,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:34,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905518807] [2022-11-20 10:39:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:34,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:34,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:39:34,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346539102] [2022-11-20 10:39:34,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:39:34,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:34,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:34,944 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:34,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:39:35,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 10:39:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:35,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 10:39:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:35,733 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 10 treesize of output 8 [2022-11-20 10:39:35,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:39:35,887 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 110 treesize of output 99 [2022-11-20 10:39:35,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:35,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-20 10:39:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:35,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:35,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 42 [2022-11-20 10:39:36,102 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 66 treesize of output 57 [2022-11-20 10:39:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 117 [2022-11-20 10:39:36,253 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 66 treesize of output 57 [2022-11-20 10:39:36,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 117 [2022-11-20 10:39:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 36 [2022-11-20 10:39:36,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 10:39:36,722 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:39:36,722 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 2 case distinctions, treesize of input 146 treesize of output 132 [2022-11-20 10:39:36,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:36,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2022-11-20 10:39:36,753 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 10:39:37,061 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:39:37,062 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 2 case distinctions, treesize of input 90 treesize of output 78 [2022-11-20 10:39:37,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 123 [2022-11-20 10:39:37,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:37,363 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 10:39:37,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 54 [2022-11-20 10:39:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:37,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:44,158 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 479 treesize of output 475 [2022-11-20 10:39:44,197 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 186 treesize of output 168 [2022-11-20 10:39:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:44,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:44,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905518807] [2022-11-20 10:39:44,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:39:44,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346539102] [2022-11-20 10:39:44,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346539102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:44,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:44,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2022-11-20 10:39:44,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610957751] [2022-11-20 10:39:44,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:44,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 10:39:44,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 10:39:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1659, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 10:39:44,497 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:51,657 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2022-11-20 10:39:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 10:39:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 10:39:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:51,659 INFO L225 Difference]: With dead ends: 170 [2022-11-20 10:39:51,659 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 10:39:51,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1011, Invalid=5631, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 10:39:51,674 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 191 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:51,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 122 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 259 Invalid, 0 Unknown, 489 Unchecked, 0.5s Time] [2022-11-20 10:39:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 10:39:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 124. [2022-11-20 10:39:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2022-11-20 10:39:51,707 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 40 [2022-11-20 10:39:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:51,707 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2022-11-20 10:39:51,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2022-11-20 10:39:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 10:39:51,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:51,708 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:51,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:51,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:39:51,915 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 280923367, now seen corresponding path program 7 times [2022-11-20 10:39:51,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:51,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931470399] [2022-11-20 10:39:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:51,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:51,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:39:51,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398128511] [2022-11-20 10:39:51,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:39:51,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:51,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:51,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:51,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:39:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:39:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:39:52,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:39:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931470399] [2022-11-20 10:39:52,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:39:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398128511] [2022-11-20 10:39:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398128511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:52,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:52,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-20 10:39:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644909870] [2022-11-20 10:39:52,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:52,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:39:52,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:39:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:39:52,304 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:52,579 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2022-11-20 10:39:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:39:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-20 10:39:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:52,581 INFO L225 Difference]: With dead ends: 184 [2022-11-20 10:39:52,581 INFO L226 Difference]: Without dead ends: 128 [2022-11-20 10:39:52,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:39:52,583 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:52,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 78 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:39:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-20 10:39:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2022-11-20 10:39:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 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) [2022-11-20 10:39:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-11-20 10:39:52,607 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 42 [2022-11-20 10:39:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:52,608 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-11-20 10:39:52,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-11-20 10:39:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 10:39:52,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:52,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:52,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:52,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:39:52,823 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358930, now seen corresponding path program 8 times [2022-11-20 10:39:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592309440] [2022-11-20 10:39:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:52,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:52,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:39:52,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199151011] [2022-11-20 10:39:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:52,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:52,850 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:52,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_273c1b07-fbbd-409a-b8fa-3fdcfe62ba11/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:39:53,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:53,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:53,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 10:39:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:53,380 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 10 treesize of output 8 [2022-11-20 10:39:53,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:39:53,474 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 110 treesize of output 99 [2022-11-20 10:39:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-20 10:39:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 88 [2022-11-20 10:39:53,645 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 72 treesize of output 61 [2022-11-20 10:39:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 119 [2022-11-20 10:39:53,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 24 [2022-11-20 10:39:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-20 10:39:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:53,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-20 10:39:54,005 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:39:54,006 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 2 case distinctions, treesize of input 151 treesize of output 137 [2022-11-20 10:39:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:54,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2022-11-20 10:39:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 101 [2022-11-20 10:39:54,283 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:39:54,283 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 2 case distinctions, treesize of input 181 treesize of output 163 [2022-11-20 10:39:54,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 235 [2022-11-20 10:39:54,376 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 10:39:54,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:39:54,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:54,544 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 10:39:54,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 68 [2022-11-20 10:39:54,959 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-20 10:39:54,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 40 [2022-11-20 10:39:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:54,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:28,000 WARN L233 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 124 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:40:37,088 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 599210 treesize of output 591146 [2022-11-20 10:41:08,426 WARN L233 SmtUtils]: Spent 31.34s on a formula simplification. DAG size of input: 821 DAG size of output: 811 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 10:41:08,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:08,514 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 570218 treesize of output 541814 [2022-11-20 10:41:20,859 WARN L233 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 828 DAG size of output: 827 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 10:41:33,000 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 825 DAG size of output: 825 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)