./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a --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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- 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-b5237d8 [2022-11-21 13:52:53,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:52:53,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:52:53,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:52:53,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:52:53,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:52:53,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:52:53,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:52:53,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:52:53,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:52:53,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:52:53,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:52:53,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:52:53,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:52:53,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:52:53,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:52:53,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:52:53,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:52:53,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:52:53,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:52:53,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:52:53,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:52:53,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:52:53,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:52:53,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:52:53,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:52:53,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:52:53,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:52:53,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:52:53,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:52:53,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:52:53,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:52:53,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:52:53,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:52:53,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:52:53,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:52:53,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:52:53,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:52:53,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:52:53,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:52:53,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:52:53,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:52:53,730 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:52:53,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:52:53,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:52:53,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:52:53,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:52:53,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:52:53,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:52:53,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:52:53,734 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:52:53,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:52:53,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:52:53,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:52:53,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:52:53,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:52:53,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:52:53,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:52:53,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:52:53,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:52:53,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:52:53,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:52:53,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:52:53,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:52:53,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:52:53,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:52:53,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:52:53,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:52:53,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:52:53,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:52:53,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:52:53,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:52:53,740 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:52:53,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:52:53,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:52:53,741 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_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2022-11-21 13:52:53,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:52:54,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:52:54,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:52:54,027 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:52:54,027 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:52:54,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-multidimensional/max-2-u.c [2022-11-21 13:52:57,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:52:57,296 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:52:57,296 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/sv-benchmarks/c/array-multidimensional/max-2-u.c [2022-11-21 13:52:57,303 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/data/dc178100e/00faa7611fe94a809557cbf7ae30554c/FLAG5334cf005 [2022-11-21 13:52:57,327 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/data/dc178100e/00faa7611fe94a809557cbf7ae30554c [2022-11-21 13:52:57,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:52:57,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:52:57,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:52:57,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:52:57,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:52:57,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4679f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57, skipping insertion in model container [2022-11-21 13:52:57,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:52:57,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:52:57,534 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_76339ceb-003f-40ee-ac44-de7265968ae5/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2022-11-21 13:52:57,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:52:57,582 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:52:57,591 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_76339ceb-003f-40ee-ac44-de7265968ae5/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2022-11-21 13:52:57,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:52:57,613 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:52:57,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57 WrapperNode [2022-11-21 13:52:57,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:52:57,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:52:57,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:52:57,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:52:57,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,651 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-21 13:52:57,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:52:57,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:52:57,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:52:57,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:52:57,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:52:57,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:52:57,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:52:57,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:52:57,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (1/1) ... [2022-11-21 13:52:57,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:52:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:57,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:52:57,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:52:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:52:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:52:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:52:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:52:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:52:57,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:52:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:52:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:52:57,894 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:52:57,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:52:58,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:52:58,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:52:58,060 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-21 13:52:58,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:52:58 BoogieIcfgContainer [2022-11-21 13:52:58,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:52:58,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:52:58,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:52:58,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:52:58,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:52:57" (1/3) ... [2022-11-21 13:52:58,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fe50b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:52:58, skipping insertion in model container [2022-11-21 13:52:58,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:57" (2/3) ... [2022-11-21 13:52:58,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fe50b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:52:58, skipping insertion in model container [2022-11-21 13:52:58,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:52:58" (3/3) ... [2022-11-21 13:52:58,071 INFO L112 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2022-11-21 13:52:58,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:52:58,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:52:58,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:52:58,163 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;@596d5b91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:52:58,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:52:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 13:52:58,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:58,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:58,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:52:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2022-11-21 13:52:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:58,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701215303] [2022-11-21 13:52:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:58,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:52:58,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14258162] [2022-11-21 13:52:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:58,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:58,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:58,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:52:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:52:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:58,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:58,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701215303] [2022-11-21 13:52:58,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:52:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14258162] [2022-11-21 13:52:58,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14258162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:58,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:58,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:52:58,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988835750] [2022-11-21 13:52:58,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:58,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:58,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:58,653 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:58,726 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-11-21 13:52:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 13:52:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:58,741 INFO L225 Difference]: With dead ends: 47 [2022-11-21 13:52:58,741 INFO L226 Difference]: Without dead ends: 22 [2022-11-21 13:52:58,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:58,747 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:58,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-21 13:52:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-11-21 13:52:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2022-11-21 13:52:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-21 13:52:58,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2022-11-21 13:52:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:58,795 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-21 13:52:58,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-21 13:52:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:52:58,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:58,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:58,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:52:59,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 13:52:59,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:52:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2022-11-21 13:52:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:59,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540022908] [2022-11-21 13:52:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:59,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:52:59,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051036106] [2022-11-21 13:52:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:59,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:59,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:52:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:59,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:52:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:59,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540022908] [2022-11-21 13:52:59,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:52:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051036106] [2022-11-21 13:52:59,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051036106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:59,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:59,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:52:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901382440] [2022-11-21 13:52:59,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:52:59,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:59,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:52:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:59,121 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:59,187 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-11-21 13:52:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:52:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 13:52:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:59,189 INFO L225 Difference]: With dead ends: 49 [2022-11-21 13:52:59,189 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 13:52:59,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:59,191 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:59,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:52:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 13:52:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-21 13:52:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-21 13:52:59,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2022-11-21 13:52:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:59,201 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-21 13:52:59,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-21 13:52:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 13:52:59,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:59,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:59,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:52:59,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:59,409 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:52:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2022-11-21 13:52:59,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:52:59,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593339920] [2022-11-21 13:52:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:52:59,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:52:59,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151334299] [2022-11-21 13:52:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:59,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:52:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:52:59,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:52:59,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:52:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:52:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:59,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:52:59,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593339920] [2022-11-21 13:52:59,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:52:59,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151334299] [2022-11-21 13:52:59,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151334299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:59,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:52:59,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-21 13:52:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365154709] [2022-11-21 13:52:59,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:59,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:52:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:52:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:52:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:52:59,666 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2022-11-21 13:52:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:59,853 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-11-21 13:52:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:52:59,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 14 [2022-11-21 13:52:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:59,855 INFO L225 Difference]: With dead ends: 73 [2022-11-21 13:52:59,855 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 13:52:59,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:52:59,857 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:59,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 41 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:52:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 13:52:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-21 13:52:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-11-21 13:52:59,882 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2022-11-21 13:52:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:59,882 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-11-21 13:52:59,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2022-11-21 13:52:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-11-21 13:52:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 13:52:59,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:59,883 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:59,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:00,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:00,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:53:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1437205722, now seen corresponding path program 2 times [2022-11-21 13:53:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:00,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003650796] [2022-11-21 13:53:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:00,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:53:00,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868223167] [2022-11-21 13:53:00,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:53:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:00,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:00,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:53:00,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:53:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:53:00,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:53:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 13:53:00,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:53:00,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003650796] [2022-11-21 13:53:00,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:53:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868223167] [2022-11-21 13:53:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868223167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:00,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:00,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:53:00,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706234915] [2022-11-21 13:53:00,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:00,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:53:00,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:00,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:53:00,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:00,219 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:00,280 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-11-21 13:53:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:53:00,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 13:53:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:00,283 INFO L225 Difference]: With dead ends: 100 [2022-11-21 13:53:00,283 INFO L226 Difference]: Without dead ends: 82 [2022-11-21 13:53:00,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:00,285 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:00,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:53:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-21 13:53:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2022-11-21 13:53:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-11-21 13:53:00,297 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2022-11-21 13:53:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:00,298 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-11-21 13:53:00,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-11-21 13:53:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 13:53:00,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:00,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:00,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:00,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:53:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 1 times [2022-11-21 13:53:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50531852] [2022-11-21 13:53:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:00,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:53:00,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043238408] [2022-11-21 13:53:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:00,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:00,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:00,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:53:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:53:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-21 13:53:00,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-21 13:53:00,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50531852] [2022-11-21 13:53:00,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:53:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043238408] [2022-11-21 13:53:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043238408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:00,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:00,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-21 13:53:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784375112] [2022-11-21 13:53:00,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:53:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:53:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:53:00,852 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:01,168 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-11-21 13:53:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 13:53:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-21 13:53:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:01,170 INFO L225 Difference]: With dead ends: 148 [2022-11-21 13:53:01,170 INFO L226 Difference]: Without dead ends: 106 [2022-11-21 13:53:01,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:53:01,172 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 434 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:01,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 55 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:53:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-21 13:53:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-11-21 13:53:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-11-21 13:53:01,196 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 32 [2022-11-21 13:53:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:01,197 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-11-21 13:53:01,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-11-21 13:53:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 13:53:01,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:01,200 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:01,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:01,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:01,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:53:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 307149302, now seen corresponding path program 2 times [2022-11-21 13:53:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:01,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173639739] [2022-11-21 13:53:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:01,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:01,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:53:01,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368468117] [2022-11-21 13:53:01,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:53:01,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:01,439 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:01,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:53:01,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:53:01,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:53:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 13:53:01,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-21 13:53:01,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-21 13:53:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:02,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173639739] [2022-11-21 13:53:02,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:53:02,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368468117] [2022-11-21 13:53:02,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368468117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:02,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:02,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-21 13:53:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972390611] [2022-11-21 13:53:02,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:02,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 13:53:02,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:02,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 13:53:02,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-21 13:53:02,009 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:02,702 INFO L93 Difference]: Finished difference Result 298 states and 385 transitions. [2022-11-21 13:53:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 13:53:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 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 56 [2022-11-21 13:53:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:02,705 INFO L225 Difference]: With dead ends: 298 [2022-11-21 13:53:02,705 INFO L226 Difference]: Without dead ends: 214 [2022-11-21 13:53:02,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 13:53:02,707 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 753 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:02,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 123 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:53:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-21 13:53:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 171. [2022-11-21 13:53:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2882352941176471) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2022-11-21 13:53:02,733 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 56 [2022-11-21 13:53:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:02,733 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2022-11-21 13:53:02,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2022-11-21 13:53:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-21 13:53:02,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:02,736 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:02,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 13:53:02,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:53:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash 270851446, now seen corresponding path program 3 times [2022-11-21 13:53:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856050329] [2022-11-21 13:53:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:02,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:53:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42576142] [2022-11-21 13:53:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:53:02,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:02,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:02,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:02,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:53:03,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 13:53:03,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:53:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:53:03,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-21 13:53:03,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-21 13:53:03,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856050329] [2022-11-21 13:53:03,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:53:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42576142] [2022-11-21 13:53:03,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42576142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:03,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:03,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-21 13:53:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215393717] [2022-11-21 13:53:03,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 13:53:03,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 13:53:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:53:03,597 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:03,765 INFO L93 Difference]: Finished difference Result 766 states and 981 transitions. [2022-11-21 13:53:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:53:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-21 13:53:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:03,768 INFO L225 Difference]: With dead ends: 766 [2022-11-21 13:53:03,769 INFO L226 Difference]: Without dead ends: 694 [2022-11-21 13:53:03,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:53:03,771 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:03,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 33 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:53:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-21 13:53:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 378. [2022-11-21 13:53:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.312997347480106) internal successors, (495), 377 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 495 transitions. [2022-11-21 13:53:03,821 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 495 transitions. Word has length 104 [2022-11-21 13:53:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:03,821 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 495 transitions. [2022-11-21 13:53:03,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 495 transitions. [2022-11-21 13:53:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-21 13:53:03,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:03,826 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:03,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:04,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:04,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:53:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:04,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1665112998, now seen corresponding path program 4 times [2022-11-21 13:53:04,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:04,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198002129] [2022-11-21 13:53:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:04,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:53:04,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618973284] [2022-11-21 13:53:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:53:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:04,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:04,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:53:04,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:53:04,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:53:04,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 13:53:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-21 13:53:05,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-21 13:53:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:07,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198002129] [2022-11-21 13:53:07,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 13:53:07,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618973284] [2022-11-21 13:53:07,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618973284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:07,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:07,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-21 13:53:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112632181] [2022-11-21 13:53:07,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 13:53:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 13:53:07,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 13:53:07,014 INFO L87 Difference]: Start difference. First operand 378 states and 495 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:11,350 INFO L93 Difference]: Finished difference Result 1965 states and 2419 transitions. [2022-11-21 13:53:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-21 13:53:11,351 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-11-21 13:53:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:11,360 INFO L225 Difference]: With dead ends: 1965 [2022-11-21 13:53:11,361 INFO L226 Difference]: Without dead ends: 1893 [2022-11-21 13:53:11,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10069 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2022-11-21 13:53:11,371 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 945 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:11,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 992 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 13:53:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2022-11-21 13:53:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 792. [2022-11-21 13:53:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.3236409608091024) internal successors, (1047), 791 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1047 transitions. [2022-11-21 13:53:11,456 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1047 transitions. Word has length 311 [2022-11-21 13:53:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:11,457 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1047 transitions. [2022-11-21 13:53:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1047 transitions. [2022-11-21 13:53:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-11-21 13:53:11,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:11,502 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 220, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:11,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 13:53:11,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:11,709 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:53:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1543634522, now seen corresponding path program 5 times [2022-11-21 13:53:11,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:11,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315745428] [2022-11-21 13:53:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:11,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 13:53:11,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580828743] [2022-11-21 13:53:11,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:53:11,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:11,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:11,807 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 14:03:51,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 184 check-sat command(s) [2022-11-21 14:03:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:03:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 14:03:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:03:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 34471 proven. 715 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-11-21 14:03:52,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:03:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 31477 proven. 3709 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-11-21 14:03:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:53,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315745428] [2022-11-21 14:03:53,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 14:03:53,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580828743] [2022-11-21 14:03:53,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580828743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:03:53,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:03:53,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-21 14:03:53,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059921444] [2022-11-21 14:03:53,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:03:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-21 14:03:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-21 14:03:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 14:03:53,441 INFO L87 Difference]: Start difference. First operand 792 states and 1047 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:03:55,345 INFO L93 Difference]: Finished difference Result 2488 states and 3505 transitions. [2022-11-21 14:03:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 14:03:55,346 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 725 [2022-11-21 14:03:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:03:55,352 INFO L225 Difference]: With dead ends: 2488 [2022-11-21 14:03:55,352 INFO L226 Difference]: Without dead ends: 1699 [2022-11-21 14:03:55,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1471 GetRequests, 1400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-21 14:03:55,361 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1143 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 14:03:55,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 210 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 14:03:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-21 14:03:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1608. [2022-11-21 14:03:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 1.3235843186060983) internal successors, (2127), 1607 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2127 transitions. [2022-11-21 14:03:55,522 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2127 transitions. Word has length 725 [2022-11-21 14:03:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:03:55,522 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2127 transitions. [2022-11-21 14:03:55,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2127 transitions. [2022-11-21 14:03:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1470 [2022-11-21 14:03:55,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:03:55,591 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 460, 46, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:55,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 14:03:55,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:55,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 14:03:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash 467146662, now seen corresponding path program 6 times [2022-11-21 14:03:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508044316] [2022-11-21 14:03:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:55,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 14:03:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249186891] [2022-11-21 14:03:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 14:03:55,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:55,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:03:55,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 14:03:56,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 14:03:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:03:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 14:03:56,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:03:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-11-21 14:03:56,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:03:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-11-21 14:03:56,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508044316] [2022-11-21 14:03:56,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 14:03:56,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249186891] [2022-11-21 14:03:56,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249186891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:03:56,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:03:56,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-21 14:03:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552912738] [2022-11-21 14:03:56,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:03:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 14:03:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 14:03:56,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 14:03:56,787 INFO L87 Difference]: Start difference. First operand 1608 states and 2127 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2022-11-21 14:03:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:03:57,023 INFO L93 Difference]: Finished difference Result 3311 states and 4353 transitions. [2022-11-21 14:03:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 14:03:57,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 1469 [2022-11-21 14:03:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:03:57,030 INFO L225 Difference]: With dead ends: 3311 [2022-11-21 14:03:57,030 INFO L226 Difference]: Without dead ends: 1755 [2022-11-21 14:03:57,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2936 GetRequests, 2932 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 14:03:57,033 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 14:03:57,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 14:03:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2022-11-21 14:03:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1755. [2022-11-21 14:03:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.298175598631699) internal successors, (2277), 1754 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2277 transitions. [2022-11-21 14:03:57,233 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2277 transitions. Word has length 1469 [2022-11-21 14:03:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:03:57,234 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2277 transitions. [2022-11-21 14:03:57,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2022-11-21 14:03:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2277 transitions. [2022-11-21 14:03:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-11-21 14:03:57,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:03:57,257 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 460, 184, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:57,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 14:03:57,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:57,463 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 14:03:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash -317084805, now seen corresponding path program 7 times [2022-11-21 14:03:57,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254152331] [2022-11-21 14:03:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:57,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 14:03:57,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799823211] [2022-11-21 14:03:57,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 14:03:57,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:57,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:03:57,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 14:03:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:58,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 5490 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 14:03:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:04:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-11-21 14:04:00,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:04:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-11-21 14:04:02,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:04:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254152331] [2022-11-21 14:04:02,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 14:04:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799823211] [2022-11-21 14:04:02,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799823211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:04:02,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:04:02,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-11-21 14:04:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603400486] [2022-11-21 14:04:02,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:04:02,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-21 14:04:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:04:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-21 14:04:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-11-21 14:04:02,817 INFO L87 Difference]: Start difference. First operand 1755 states and 2277 transitions. Second operand has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:04:09,986 INFO L93 Difference]: Finished difference Result 5423 states and 7621 transitions. [2022-11-21 14:04:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-21 14:04:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 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 1616 [2022-11-21 14:04:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:04:09,998 INFO L225 Difference]: With dead ends: 5423 [2022-11-21 14:04:09,998 INFO L226 Difference]: Without dead ends: 3718 [2022-11-21 14:04:10,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3277 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-11-21 14:04:10,005 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2769 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 14:04:10,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2769 Valid, 427 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 14:04:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2022-11-21 14:04:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3531. [2022-11-21 14:04:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 1.2977337110481586) internal successors, (4581), 3530 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4581 transitions. [2022-11-21 14:04:10,323 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4581 transitions. Word has length 1616 [2022-11-21 14:04:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:04:10,324 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 4581 transitions. [2022-11-21 14:04:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4581 transitions. [2022-11-21 14:04:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3249 [2022-11-21 14:04:10,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:04:10,389 INFO L195 NwaCegarLoop]: trace histogram [940, 940, 940, 376, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:04:10,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 14:04:10,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 14:04:10,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 14:04:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:04:10,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1104229509, now seen corresponding path program 8 times [2022-11-21 14:04:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:04:10,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880008006] [2022-11-21 14:04:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:04:10,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:04:10,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 14:04:10,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953342926] [2022-11-21 14:04:10,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:04:10,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:04:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:04:10,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:04:10,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 14:04:13,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:04:13,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:04:13,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 11058 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-21 14:04:13,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:04:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-11-21 14:04:19,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:04:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-11-21 14:04:27,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:04:27,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880008006] [2022-11-21 14:04:27,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 14:04:27,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953342926] [2022-11-21 14:04:27,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953342926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:04:27,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:04:27,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-11-21 14:04:27,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905853167] [2022-11-21 14:04:27,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:04:27,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-21 14:04:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:04:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-21 14:04:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-11-21 14:04:27,654 INFO L87 Difference]: Start difference. First operand 3531 states and 4581 transitions. Second operand has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:05:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:05:16,610 INFO L93 Difference]: Finished difference Result 10895 states and 15301 transitions. [2022-11-21 14:05:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-21 14:05:16,611 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 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 3248 [2022-11-21 14:05:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:05:16,628 INFO L225 Difference]: With dead ends: 10895 [2022-11-21 14:05:16,628 INFO L226 Difference]: Without dead ends: 7462 [2022-11-21 14:05:16,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6589 GetRequests, 6302 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-11-21 14:05:16,638 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8259 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 2081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8259 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2081 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 14:05:16,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8259 Valid, 795 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2081 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 14:05:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2022-11-21 14:05:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 7083. [2022-11-21 14:05:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 1.2975148263202485) internal successors, (9189), 7082 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:05:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9189 transitions. [2022-11-21 14:05:17,393 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9189 transitions. Word has length 3248 [2022-11-21 14:05:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:05:17,394 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9189 transitions. [2022-11-21 14:05:17,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:05:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9189 transitions. [2022-11-21 14:05:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6513 [2022-11-21 14:05:17,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:05:17,655 INFO L195 NwaCegarLoop]: trace histogram [1900, 1900, 1900, 760, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:05:17,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 14:05:17,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 14:05:17,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 14:05:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:05:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1384713083, now seen corresponding path program 9 times [2022-11-21 14:05:17,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:05:17,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078083206] [2022-11-21 14:05:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:05:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:05:18,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 14:05:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996842893] [2022-11-21 14:05:18,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 14:05:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:05:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:05:18,346 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:05:18,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 14:05:20,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 14:05:20,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:05:20,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 14:05:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:05:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 3818 proven. 0 refuted. 0 times theorem prover too weak. 5718959 trivial. 0 not checked. [2022-11-21 14:05:24,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 14:05:24,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:05:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078083206] [2022-11-21 14:05:24,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 14:05:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996842893] [2022-11-21 14:05:24,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996842893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:05:24,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:05:24,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 14:05:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848274817] [2022-11-21 14:05:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:05:24,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 14:05:24,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:05:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 14:05:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 14:05:24,221 INFO L87 Difference]: Start difference. First operand 7083 states and 9189 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2022-11-21 14:05:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:05:25,025 INFO L93 Difference]: Finished difference Result 13954 states and 18349 transitions. [2022-11-21 14:05:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 14:05:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6512 [2022-11-21 14:05:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:05:25,051 INFO L225 Difference]: With dead ends: 13954 [2022-11-21 14:05:25,051 INFO L226 Difference]: Without dead ends: 7650 [2022-11-21 14:05:25,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6512 GetRequests, 6507 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 14:05:25,060 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 14:05:25,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 14:05:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2022-11-21 14:05:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7083. [2022-11-21 14:05:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 1.2973736232702626) internal successors, (9188), 7082 states have internal predecessors, (9188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:05:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9188 transitions. [2022-11-21 14:05:25,980 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9188 transitions. Word has length 6512 [2022-11-21 14:05:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:05:25,982 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9188 transitions. [2022-11-21 14:05:25,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2022-11-21 14:05:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9188 transitions. [2022-11-21 14:05:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6513 [2022-11-21 14:05:26,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:05:26,347 INFO L195 NwaCegarLoop]: trace histogram [1900, 1900, 1899, 760, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:05:26,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 14:05:26,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 14:05:26,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 14:05:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:05:26,549 INFO L85 PathProgramCache]: Analyzing trace with hash 355652793, now seen corresponding path program 1 times [2022-11-21 14:05:26,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:05:26,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733466393] [2022-11-21 14:05:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:05:26,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:05:27,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 14:05:27,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133693540] [2022-11-21 14:05:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:05:27,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:05:27,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:05:27,028 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:05:27,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76339ceb-003f-40ee-ac44-de7265968ae5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 14:05:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:05:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 22192 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-21 14:05:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:05:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 109447 proven. 18145 refuted. 0 times theorem prover too weak. 5595185 trivial. 0 not checked. [2022-11-21 14:05:53,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:06:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 109447 proven. 18145 refuted. 0 times theorem prover too weak. 5595185 trivial. 0 not checked. [2022-11-21 14:06:32,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:06:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733466393] [2022-11-21 14:06:32,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 14:06:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133693540] [2022-11-21 14:06:32,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133693540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:06:32,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:06:32,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2022-11-21 14:06:32,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622320807] [2022-11-21 14:06:32,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:06:32,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-11-21 14:06:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:06:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-11-21 14:06:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2022-11-21 14:06:32,137 INFO L87 Difference]: Start difference. First operand 7083 states and 9188 transitions. Second operand has 386 states, 386 states have (on average 1.0518134715025906) internal successors, (406), 386 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)