./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep40-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep40-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8 --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 f09ee736f3dbb8dbc36f75a04671608fd1c3014086677159a28111a32a84bd34 --- 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-2329fc7 [2022-12-13 11:07:39,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:07:39,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:07:39,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:07:39,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:07:39,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:07:39,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:07:39,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:07:39,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:07:39,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:07:39,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:07:39,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:07:39,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:07:39,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:07:39,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:07:39,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:07:39,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:07:39,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:07:39,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:07:39,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:07:39,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:07:39,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:07:39,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:07:39,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:07:39,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:07:39,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:07:39,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:07:39,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:07:39,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:07:39,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:07:39,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:07:39,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:07:39,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:07:39,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:07:39,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:07:39,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:07:39,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:07:39,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:07:39,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:07:39,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:07:39,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:07:39,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:07:39,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:07:39,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:07:39,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:07:39,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:07:39,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:07:39,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:07:39,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:07:39,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:07:39,532 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:07:39,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:07:39,533 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:07:39,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:07:39,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:07:39,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:07:39,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:07:39,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:07:39,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:07:39,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:07:39,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:07:39,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:07:39,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:07:39,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:07:39,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:07:39,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:07:39,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:07:39,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:07:39,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:07:39,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:07:39,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:07:39,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:07:39,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:07:39,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:07:39,543 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:07:39,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:07:39,543 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:07:39,543 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09ee736f3dbb8dbc36f75a04671608fd1c3014086677159a28111a32a84bd34 [2022-12-13 11:07:39,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:07:39,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:07:39,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:07:39,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:07:39,730 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:07:39,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/reducercommutativity/sep40-1.i [2022-12-13 11:07:42,370 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:07:42,491 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:07:42,492 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/sv-benchmarks/c/reducercommutativity/sep40-1.i [2022-12-13 11:07:42,496 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/data/5c354bae3/d944b37b66344fb787a8376e2e8e489c/FLAGea017051a [2022-12-13 11:07:42,507 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/data/5c354bae3/d944b37b66344fb787a8376e2e8e489c [2022-12-13 11:07:42,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:07:42,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:07:42,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:07:42,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:07:42,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:07:42,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d302904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42, skipping insertion in model container [2022-12-13 11:07:42,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:07:42,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:07:42,644 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_63ce52bd-ea50-40d7-b501-06842b9807aa/sv-benchmarks/c/reducercommutativity/sep40-1.i[1293,1306] [2022-12-13 11:07:42,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:07:42,654 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:07:42,668 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_63ce52bd-ea50-40d7-b501-06842b9807aa/sv-benchmarks/c/reducercommutativity/sep40-1.i[1293,1306] [2022-12-13 11:07:42,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:07:42,679 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:07:42,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42 WrapperNode [2022-12-13 11:07:42,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:07:42,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:07:42,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:07:42,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:07:42,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,703 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-13 11:07:42,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:07:42,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:07:42,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:07:42,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:07:42,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,719 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:07:42,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:07:42,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:07:42,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:07:42,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (1/1) ... [2022-12-13 11:07:42,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:07:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:42,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:07:42,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:07:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:07:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:07:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:07:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:07:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:07:42,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:07:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:07:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:07:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-12-13 11:07:42,773 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-12-13 11:07:42,839 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:07:42,841 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:07:42,991 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:07:43,000 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:07:43,000 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:07:43,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:07:43 BoogieIcfgContainer [2022-12-13 11:07:43,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:07:43,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:07:43,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:07:43,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:07:43,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:07:42" (1/3) ... [2022-12-13 11:07:43,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493840cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:07:43, skipping insertion in model container [2022-12-13 11:07:43,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:42" (2/3) ... [2022-12-13 11:07:43,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493840cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:07:43, skipping insertion in model container [2022-12-13 11:07:43,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:07:43" (3/3) ... [2022-12-13 11:07:43,008 INFO L112 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2022-12-13 11:07:43,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:07:43,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:07:43,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:07:43,064 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;@55b05c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:07:43,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:07:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 11:07:43,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:43,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:43,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:43,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-12-13 11:07:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:43,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396868406] [2022-12-13 11:07:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 11:07:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 11:07:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 11:07:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:07:43,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396868406] [2022-12-13 11:07:43,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396868406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:43,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:07:43,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:07:43,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637886133] [2022-12-13 11:07:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:43,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:07:43,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:43,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:07:43,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:07:43,333 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:07:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:43,359 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-12-13 11:07:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:07:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 11:07:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:43,366 INFO L225 Difference]: With dead ends: 52 [2022-12-13 11:07:43,367 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 11:07:43,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:07:43,371 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:43,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 11:07:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-12-13 11:07:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-12-13 11:07:43,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-12-13 11:07:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:43,400 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-12-13 11:07:43,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:07:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-12-13 11:07:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 11:07:43,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:43,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:07:43,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-12-13 11:07:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:43,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922277658] [2022-12-13 11:07:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 11:07:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 11:07:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 11:07:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:07:43,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922277658] [2022-12-13 11:07:43,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922277658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108802952] [2022-12-13 11:07:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:43,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:43,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:43,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:43,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:07:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:07:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 11:07:43,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:07:43,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108802952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:43,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:07:43,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 11:07:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745710708] [2022-12-13 11:07:43,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:43,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:07:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:07:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:07:43,629 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:07:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:43,639 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-12-13 11:07:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:07:43,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-12-13 11:07:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:43,641 INFO L225 Difference]: With dead ends: 45 [2022-12-13 11:07:43,641 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 11:07:43,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:07:43,643 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:43,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 11:07:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-12-13 11:07:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-12-13 11:07:43,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-12-13 11:07:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:43,647 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-12-13 11:07:43,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:07:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-12-13 11:07:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 11:07:43,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:43,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:43,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:07:43,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:43,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-12-13 11:07:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:43,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735462353] [2022-12-13 11:07:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 11:07:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 11:07:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 11:07:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:07:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735462353] [2022-12-13 11:07:44,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735462353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252616482] [2022-12-13 11:07:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:44,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:44,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:44,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:44,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:07:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:07:44,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:07:44,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:07:44,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252616482] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:44,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:07:44,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-13 11:07:44,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418931608] [2022-12-13 11:07:44,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:44,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:07:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:07:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:07:44,188 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:07:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:44,200 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-12-13 11:07:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:07:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-12-13 11:07:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:44,201 INFO L225 Difference]: With dead ends: 41 [2022-12-13 11:07:44,202 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 11:07:44,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:07:44,203 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:44,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 11:07:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-12-13 11:07:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-13 11:07:44,209 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-12-13 11:07:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:44,211 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-13 11:07:44,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:07:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-13 11:07:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 11:07:44,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:44,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:44,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 11:07:44,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:44,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-12-13 11:07:44,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:44,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813046359] [2022-12-13 11:07:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 11:07:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 11:07:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 11:07:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:07:44,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813046359] [2022-12-13 11:07:44,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813046359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646831258] [2022-12-13 11:07:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:44,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:44,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:44,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:07:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:07:44,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 11:07:44,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 11:07:44,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646831258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:44,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:44,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-13 11:07:44,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422844459] [2022-12-13 11:07:44,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:44,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:07:44,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:44,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:07:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:07:44,781 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 11:07:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:44,816 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-12-13 11:07:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:07:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-12-13 11:07:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:44,817 INFO L225 Difference]: With dead ends: 58 [2022-12-13 11:07:44,817 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 11:07:44,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:07:44,818 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:44,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 11:07:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-12-13 11:07:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-12-13 11:07:44,821 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-12-13 11:07:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:44,822 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-12-13 11:07:44,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 11:07:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-12-13 11:07:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 11:07:44,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:44,822 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:44,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:07:45,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:45,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-12-13 11:07:45,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:45,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205094319] [2022-12-13 11:07:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 11:07:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 11:07:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 11:07:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-13 11:07:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205094319] [2022-12-13 11:07:45,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205094319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346119172] [2022-12-13 11:07:45,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:07:45,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:45,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:07:45,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:07:45,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:45,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:07:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 11:07:45,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 11:07:45,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346119172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:45,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:45,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-13 11:07:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123926638] [2022-12-13 11:07:45,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:45,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:07:45,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:45,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:07:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:07:45,404 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 11:07:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:45,450 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-12-13 11:07:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:07:45,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-12-13 11:07:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:45,451 INFO L225 Difference]: With dead ends: 74 [2022-12-13 11:07:45,451 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 11:07:45,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:07:45,452 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:45,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 11:07:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-12-13 11:07:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-12-13 11:07:45,457 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-12-13 11:07:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:45,457 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-12-13 11:07:45,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 11:07:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-12-13 11:07:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 11:07:45,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:45,458 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:45,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:07:45,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:45,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-12-13 11:07:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:45,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583544519] [2022-12-13 11:07:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:45,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 11:07:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:07:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 11:07:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-13 11:07:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583544519] [2022-12-13 11:07:45,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583544519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123147795] [2022-12-13 11:07:45,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:07:45,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:45,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:45,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:45,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:07:46,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:07:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:07:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 11:07:46,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 11:07:46,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123147795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:46,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:46,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-12-13 11:07:46,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816261777] [2022-12-13 11:07:46,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:46,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:07:46,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:07:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:07:46,159 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:46,215 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-12-13 11:07:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:07:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-12-13 11:07:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:46,217 INFO L225 Difference]: With dead ends: 90 [2022-12-13 11:07:46,217 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 11:07:46,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:07:46,218 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:46,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 11:07:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-12-13 11:07:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-12-13 11:07:46,226 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-12-13 11:07:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:46,226 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-12-13 11:07:46,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-12-13 11:07:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 11:07:46,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:46,228 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:46,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:07:46,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:07:46,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-12-13 11:07:46,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:46,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273384747] [2022-12-13 11:07:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:46,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:46,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 11:07:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 11:07:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:46,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 11:07:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-12-13 11:07:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273384747] [2022-12-13 11:07:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273384747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544018793] [2022-12-13 11:07:46,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:07:46,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:46,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:46,834 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:46,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:07:46,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:07:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:07:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-12-13 11:07:47,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-12-13 11:07:47,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544018793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:47,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:47,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-13 11:07:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741015012] [2022-12-13 11:07:47,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:47,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 11:07:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:47,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 11:07:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:07:47,204 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 11:07:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:47,274 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2022-12-13 11:07:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:07:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-12-13 11:07:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:47,276 INFO L225 Difference]: With dead ends: 127 [2022-12-13 11:07:47,276 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 11:07:47,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:07:47,277 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:47,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 11:07:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-12-13 11:07:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-12-13 11:07:47,287 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2022-12-13 11:07:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:47,287 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-12-13 11:07:47,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 11:07:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-12-13 11:07:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 11:07:47,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:47,289 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:47,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:07:47,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:47,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2022-12-13 11:07:47,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:47,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959092473] [2022-12-13 11:07:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 11:07:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:48,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-12-13 11:07:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:48,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-12-13 11:07:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-12-13 11:07:48,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:48,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959092473] [2022-12-13 11:07:48,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959092473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562707762] [2022-12-13 11:07:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:07:48,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:48,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:48,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:07:49,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 11:07:49,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:07:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-12-13 11:07:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2022-12-13 11:07:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562707762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:50,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:50,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-12-13 11:07:50,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184858522] [2022-12-13 11:07:50,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:50,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 11:07:50,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 11:07:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 11:07:50,045 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:50,143 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2022-12-13 11:07:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 11:07:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2022-12-13 11:07:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:50,144 INFO L225 Difference]: With dead ends: 154 [2022-12-13 11:07:50,144 INFO L226 Difference]: Without dead ends: 116 [2022-12-13 11:07:50,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 11:07:50,146 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:07:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-13 11:07:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-12-13 11:07:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2022-12-13 11:07:50,157 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2022-12-13 11:07:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:50,157 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2022-12-13 11:07:50,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2022-12-13 11:07:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-13 11:07:50,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:50,161 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:50,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:07:50,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:50,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2022-12-13 11:07:50,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:50,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308072214] [2022-12-13 11:07:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:51,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 11:07:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:51,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-12-13 11:07:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:51,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-12-13 11:07:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2022-12-13 11:07:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308072214] [2022-12-13 11:07:51,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308072214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821120728] [2022-12-13 11:07:51,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:07:51,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:51,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:51,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:51,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:07:51,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 11:07:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:07:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2022-12-13 11:07:51,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2022-12-13 11:07:51,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821120728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:51,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:51,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-12-13 11:07:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094235030] [2022-12-13 11:07:51,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:51,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 11:07:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 11:07:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 11:07:51,348 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:51,440 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-12-13 11:07:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 11:07:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2022-12-13 11:07:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:51,442 INFO L225 Difference]: With dead ends: 188 [2022-12-13 11:07:51,442 INFO L226 Difference]: Without dead ends: 126 [2022-12-13 11:07:51,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 11:07:51,444 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:51,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:07:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-13 11:07:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-12-13 11:07:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2022-12-13 11:07:51,452 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2022-12-13 11:07:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:51,452 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2022-12-13 11:07:51,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2022-12-13 11:07:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-13 11:07:51,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:51,454 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:51,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 11:07:51,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 11:07:51,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2022-12-13 11:07:51,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:51,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402511536] [2022-12-13 11:07:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:51,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:52,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 11:07:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-12-13 11:07:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-12-13 11:07:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-12-13 11:07:52,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:52,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402511536] [2022-12-13 11:07:52,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402511536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:52,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91186182] [2022-12-13 11:07:52,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:07:52,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:52,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:52,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:07:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:07:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-12-13 11:07:52,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-12-13 11:07:53,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91186182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:53,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:53,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 43 [2022-12-13 11:07:53,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898779352] [2022-12-13 11:07:53,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:53,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 11:07:53,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 11:07:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 11:07:53,199 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 43 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 43 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 11:07:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:53,294 INFO L93 Difference]: Finished difference Result 223 states and 272 transitions. [2022-12-13 11:07:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 11:07:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 43 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2022-12-13 11:07:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:53,296 INFO L225 Difference]: With dead ends: 223 [2022-12-13 11:07:53,296 INFO L226 Difference]: Without dead ends: 153 [2022-12-13 11:07:53,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 11:07:53,298 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:53,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 194 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:07:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-13 11:07:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-12-13 11:07:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.114864864864865) internal successors, (165), 148 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2022-12-13 11:07:53,307 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 218 [2022-12-13 11:07:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:53,307 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2022-12-13 11:07:53,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 43 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 11:07:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2022-12-13 11:07:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-12-13 11:07:53,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:53,309 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 40, 40, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:53,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:07:53,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:07:53,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1233712961, now seen corresponding path program 8 times [2022-12-13 11:07:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:53,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569554415] [2022-12-13 11:07:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:53,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:07:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:54,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-12-13 11:07:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-12-13 11:07:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 2833 trivial. 0 not checked. [2022-12-13 11:07:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569554415] [2022-12-13 11:07:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569554415] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132624452] [2022-12-13 11:07:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:07:54,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:54,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:54,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:07:54,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:07:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:07:54,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 2837 trivial. 0 not checked. [2022-12-13 11:07:54,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 2833 trivial. 0 not checked. [2022-12-13 11:07:54,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132624452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:54,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:54,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-12-13 11:07:54,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127033642] [2022-12-13 11:07:54,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:54,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 11:07:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 11:07:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-12-13 11:07:54,590 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:07:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:54,654 INFO L93 Difference]: Finished difference Result 270 states and 339 transitions. [2022-12-13 11:07:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 11:07:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 246 [2022-12-13 11:07:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:54,656 INFO L225 Difference]: With dead ends: 270 [2022-12-13 11:07:54,656 INFO L226 Difference]: Without dead ends: 201 [2022-12-13 11:07:54,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-12-13 11:07:54,656 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 129 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:54,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 150 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-13 11:07:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-12-13 11:07:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.1683673469387754) internal successors, (229), 196 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 235 transitions. [2022-12-13 11:07:54,662 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 235 transitions. Word has length 246 [2022-12-13 11:07:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:54,663 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 235 transitions. [2022-12-13 11:07:54,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:07:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 235 transitions. [2022-12-13 11:07:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-12-13 11:07:54,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:54,667 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 40, 40, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:54,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:07:54,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 11:07:54,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash -428343617, now seen corresponding path program 9 times [2022-12-13 11:07:54,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:54,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588521009] [2022-12-13 11:07:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:54,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:07:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:56,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-12-13 11:07:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:56,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2022-12-13 11:07:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13936 backedges. 0 proven. 6863 refuted. 0 times theorem prover too weak. 7073 trivial. 0 not checked. [2022-12-13 11:07:56,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:56,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588521009] [2022-12-13 11:07:56,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588521009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:56,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892002495] [2022-12-13 11:07:56,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:07:56,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:56,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:56,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:56,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:07:56,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 11:07:56,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:07:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13936 backedges. 5530 proven. 36 refuted. 0 times theorem prover too weak. 8370 trivial. 0 not checked. [2022-12-13 11:07:56,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13936 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13900 trivial. 0 not checked. [2022-12-13 11:07:56,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892002495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:56,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:56,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2022-12-13 11:07:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626523425] [2022-12-13 11:07:56,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 11:07:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 11:07:56,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 11:07:56,879 INFO L87 Difference]: Start difference. First operand 201 states and 235 transitions. Second operand has 47 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 47 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:56,994 INFO L93 Difference]: Finished difference Result 339 states and 419 transitions. [2022-12-13 11:07:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 11:07:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 47 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 390 [2022-12-13 11:07:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:56,996 INFO L225 Difference]: With dead ends: 339 [2022-12-13 11:07:56,996 INFO L226 Difference]: Without dead ends: 222 [2022-12-13 11:07:56,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 11:07:56,998 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:56,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 291 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:07:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-13 11:07:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-12-13 11:07:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.158139534883721) internal successors, (249), 215 states have internal predecessors, (249), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 255 transitions. [2022-12-13 11:07:57,007 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 255 transitions. Word has length 390 [2022-12-13 11:07:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:57,008 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 255 transitions. [2022-12-13 11:07:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 47 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 11:07:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 255 transitions. [2022-12-13 11:07:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-12-13 11:07:57,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:57,011 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:57,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:07:57,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:07:57,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash 991955861, now seen corresponding path program 10 times [2022-12-13 11:07:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:57,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75543447] [2022-12-13 11:07:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:57,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:07:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:58,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-12-13 11:07:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:58,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 313 [2022-12-13 11:07:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14924 backedges. 0 proven. 7324 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2022-12-13 11:07:58,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:07:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75543447] [2022-12-13 11:07:58,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75543447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:07:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533947883] [2022-12-13 11:07:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:07:58,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:58,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:07:58,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:07:58,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:07:58,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 11:07:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14924 backedges. 5894 proven. 1426 refuted. 0 times theorem prover too weak. 7604 trivial. 0 not checked. [2022-12-13 11:07:59,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14924 backedges. 0 proven. 7324 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2022-12-13 11:07:59,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533947883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:59,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:07:59,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2022-12-13 11:07:59,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133758485] [2022-12-13 11:07:59,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:59,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 11:07:59,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:07:59,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 11:07:59,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 11:07:59,482 INFO L87 Difference]: Start difference. First operand 220 states and 255 transitions. Second operand has 42 states, 42 states have (on average 3.5476190476190474) internal successors, (149), 42 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:07:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:07:59,561 INFO L93 Difference]: Finished difference Result 383 states and 472 transitions. [2022-12-13 11:07:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 11:07:59,562 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5476190476190474) internal successors, (149), 42 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 415 [2022-12-13 11:07:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:07:59,562 INFO L225 Difference]: With dead ends: 383 [2022-12-13 11:07:59,563 INFO L226 Difference]: Without dead ends: 247 [2022-12-13 11:07:59,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 804 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 11:07:59,564 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 148 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:07:59,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 170 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:07:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-13 11:07:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-12-13 11:07:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.177685950413223) internal successors, (285), 242 states have internal predecessors, (285), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:07:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 291 transitions. [2022-12-13 11:07:59,569 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 291 transitions. Word has length 415 [2022-12-13 11:07:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:07:59,569 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 291 transitions. [2022-12-13 11:07:59,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5476190476190474) internal successors, (149), 42 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:07:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 291 transitions. [2022-12-13 11:07:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-12-13 11:07:59,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:07:59,572 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:59,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 11:07:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:07:59,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:07:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:59,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1077747567, now seen corresponding path program 11 times [2022-12-13 11:07:59,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:07:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179738270] [2022-12-13 11:07:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:59,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:07:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:00,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:08:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:00,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-12-13 11:08:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:00,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2022-12-13 11:08:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 23591 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2022-12-13 11:08:00,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:00,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179738270] [2022-12-13 11:08:00,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179738270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:00,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811508516] [2022-12-13 11:08:00,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:08:00,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:00,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:00,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:15:19,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2022-12-13 11:15:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:15:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:15:20,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:15:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23591 backedges. 9770 proven. 196 refuted. 0 times theorem prover too weak. 13625 trivial. 0 not checked. [2022-12-13 11:15:20,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:15:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 23591 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2022-12-13 11:15:20,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811508516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:15:20,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:15:20,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-13 11:15:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559829188] [2022-12-13 11:15:20,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:15:20,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 11:15:20,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:15:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 11:15:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:15:20,361 INFO L87 Difference]: Start difference. First operand 247 states and 291 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:15:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:15:20,412 INFO L93 Difference]: Finished difference Result 410 states and 510 transitions. [2022-12-13 11:15:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 11:15:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 496 [2022-12-13 11:15:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:15:20,414 INFO L225 Difference]: With dead ends: 410 [2022-12-13 11:15:20,414 INFO L226 Difference]: Without dead ends: 279 [2022-12-13 11:15:20,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:15:20,415 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:15:20,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 118 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:15:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-13 11:15:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-12-13 11:15:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.1569343065693432) internal successors, (317), 274 states have internal predecessors, (317), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:15:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 323 transitions. [2022-12-13 11:15:20,422 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 323 transitions. Word has length 496 [2022-12-13 11:15:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:15:20,422 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 323 transitions. [2022-12-13 11:15:20,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:15:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 323 transitions. [2022-12-13 11:15:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-12-13 11:15:20,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:15:20,425 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 40, 40, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:15:20,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 11:15:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:15:20,626 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:15:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:15:20,627 INFO L85 PathProgramCache]: Analyzing trace with hash 424049999, now seen corresponding path program 12 times [2022-12-13 11:15:20,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:15:20,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129250459] [2022-12-13 11:15:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:15:20,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:15:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:15:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:15:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:15:21,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-12-13 11:15:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:15:21,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 399 [2022-12-13 11:15:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:15:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24295 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2022-12-13 11:15:22,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:15:22,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129250459] [2022-12-13 11:15:22,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129250459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:15:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598153415] [2022-12-13 11:15:22,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:15:22,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:15:22,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:15:22,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:15:22,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:16:36,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-12-13 11:16:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:16:36,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 11:16:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:16:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24295 backedges. 9770 proven. 900 refuted. 0 times theorem prover too weak. 13625 trivial. 0 not checked. [2022-12-13 11:16:36,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:16:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24295 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2022-12-13 11:16:36,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598153415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:16:36,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:16:36,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2022-12-13 11:16:36,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46309263] [2022-12-13 11:16:36,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:16:36,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 11:16:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:16:36,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 11:16:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 11:16:36,815 INFO L87 Difference]: Start difference. First operand 279 states and 323 transitions. Second operand has 42 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:16:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:16:36,887 INFO L93 Difference]: Finished difference Result 428 states and 521 transitions. [2022-12-13 11:16:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 11:16:36,888 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 528 [2022-12-13 11:16:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:16:36,890 INFO L225 Difference]: With dead ends: 428 [2022-12-13 11:16:36,890 INFO L226 Difference]: Without dead ends: 297 [2022-12-13 11:16:36,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1030 SyntacticMatches, 23 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 11:16:36,891 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:16:36,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:16:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-13 11:16:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-12-13 11:16:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.1472602739726028) internal successors, (335), 292 states have internal predecessors, (335), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 11:16:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 341 transitions. [2022-12-13 11:16:36,898 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 341 transitions. Word has length 528 [2022-12-13 11:16:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:16:36,898 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 341 transitions. [2022-12-13 11:16:36,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:16:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 341 transitions. [2022-12-13 11:16:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-12-13 11:16:36,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:16:36,901 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:16:36,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 11:16:37,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:16:37,101 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:16:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:16:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1616784803, now seen corresponding path program 13 times [2022-12-13 11:16:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:16:37,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005551624] [2022-12-13 11:16:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:16:37,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:16:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:16:53,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:16:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:16:54,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-12-13 11:16:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:16:55,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-12-13 11:16:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:16:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 236 proven. 22189 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2022-12-13 11:16:59,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:16:59,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005551624] [2022-12-13 11:16:59,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005551624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:16:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15171865] [2022-12-13 11:16:59,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:16:59,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:16:59,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:16:59,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:16:59,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:16:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:16:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 289 conjunts are in the unsatisfiable core [2022-12-13 11:16:59,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:17:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 0 proven. 22120 refuted. 0 times theorem prover too weak. 2796 trivial. 0 not checked. [2022-12-13 11:17:02,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:17:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 0 proven. 21420 refuted. 0 times theorem prover too weak. 3496 trivial. 0 not checked. [2022-12-13 11:17:07,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15171865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:17:07,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:17:07,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 60, 50] total 172 [2022-12-13 11:17:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930485758] [2022-12-13 11:17:07,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:17:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-12-13 11:17:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:17:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-12-13 11:17:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=28884, Unknown=0, NotChecked=0, Total=29412 [2022-12-13 11:17:07,642 INFO L87 Difference]: Start difference. First operand 297 states and 341 transitions. Second operand has 172 states, 170 states have (on average 2.588235294117647) internal successors, (440), 166 states have internal predecessors, (440), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:17:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:17:23,047 INFO L93 Difference]: Finished difference Result 2706 states and 3823 transitions. [2022-12-13 11:17:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-13 11:17:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 170 states have (on average 2.588235294117647) internal successors, (440), 166 states have internal predecessors, (440), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 546 [2022-12-13 11:17:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:17:23,059 INFO L225 Difference]: With dead ends: 2706 [2022-12-13 11:17:23,060 INFO L226 Difference]: Without dead ends: 2702 [2022-12-13 11:17:23,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1072 SyntacticMatches, 9 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7614 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=553, Invalid=29897, Unknown=0, NotChecked=0, Total=30450 [2022-12-13 11:17:23,064 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 397 mSDsluCounter, 18739 mSDsCounter, 0 mSdLazyCounter, 39426 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 18948 SdHoareTripleChecker+Invalid, 39671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 39426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:17:23,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 18948 Invalid, 39671 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [245 Valid, 39426 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2022-12-13 11:17:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2022-12-13 11:17:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 1744. [2022-12-13 11:17:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1736 states have (on average 1.3024193548387097) internal successors, (2261), 1737 states have internal predecessors, (2261), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-13 11:17:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2275 transitions. [2022-12-13 11:17:23,238 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2275 transitions. Word has length 546 [2022-12-13 11:17:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:17:23,239 INFO L495 AbstractCegarLoop]: Abstraction has 1744 states and 2275 transitions. [2022-12-13 11:17:23,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 170 states have (on average 2.588235294117647) internal successors, (440), 166 states have internal predecessors, (440), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:17:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2275 transitions. [2022-12-13 11:17:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-12-13 11:17:23,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:17:23,248 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 119, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:17:23,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 11:17:23,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:17:23,448 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:17:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:17:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash -936726433, now seen corresponding path program 1 times [2022-12-13 11:17:23,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:17:23,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288753890] [2022-12-13 11:17:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:17:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:17:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:17:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:17:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:17:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-12-13 11:17:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:17:47,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-12-13 11:17:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:17:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 9768 proven. 9096 refuted. 0 times theorem prover too weak. 6052 trivial. 0 not checked. [2022-12-13 11:17:49,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:17:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288753890] [2022-12-13 11:17:49,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288753890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:17:49,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701798724] [2022-12-13 11:17:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:17:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:17:49,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:17:49,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:17:49,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:17:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:17:50,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-13 11:17:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:17:50,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-13 11:17:50,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-13 11:17:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 9771 proven. 7342 refuted. 0 times theorem prover too weak. 7803 trivial. 0 not checked. [2022-12-13 11:17:56,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:18:03,544 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-12-13 11:18:03,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 28 [2022-12-13 11:18:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 9886 proven. 7225 refuted. 0 times theorem prover too weak. 7805 trivial. 0 not checked. [2022-12-13 11:18:03,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701798724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:18:03,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:18:03,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 52, 50] total 182 [2022-12-13 11:18:03,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749654164] [2022-12-13 11:18:03,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:18:03,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-12-13 11:18:03,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:18:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-12-13 11:18:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=32267, Unknown=0, NotChecked=0, Total=32942 [2022-12-13 11:18:03,662 INFO L87 Difference]: Start difference. First operand 1744 states and 2275 transitions. Second operand has 182 states, 180 states have (on average 2.7666666666666666) internal successors, (498), 179 states have internal predecessors, (498), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:18:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:18:23,410 INFO L93 Difference]: Finished difference Result 3975 states and 5338 transitions. [2022-12-13 11:18:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2022-12-13 11:18:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 180 states have (on average 2.7666666666666666) internal successors, (498), 179 states have internal predecessors, (498), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 546 [2022-12-13 11:18:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:18:23,418 INFO L225 Difference]: With dead ends: 3975 [2022-12-13 11:18:23,419 INFO L226 Difference]: Without dead ends: 3811 [2022-12-13 11:18:23,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1119 SyntacticMatches, 8 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14004 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=1780, Invalid=74120, Unknown=0, NotChecked=0, Total=75900 [2022-12-13 11:18:23,423 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 445 mSDsluCounter, 12757 mSDsCounter, 0 mSdLazyCounter, 25090 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 12938 SdHoareTripleChecker+Invalid, 25103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 25090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:18:23,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 12938 Invalid, 25103 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 25090 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-12-13 11:18:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2022-12-13 11:18:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3451. [2022-12-13 11:18:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3439 states have (on average 1.3157894736842106) internal successors, (4525), 3442 states have internal predecessors, (4525), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-13 11:18:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 4546 transitions. [2022-12-13 11:18:23,611 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 4546 transitions. Word has length 546 [2022-12-13 11:18:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:18:23,611 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 4546 transitions. [2022-12-13 11:18:23,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 180 states have (on average 2.7666666666666666) internal successors, (498), 179 states have internal predecessors, (498), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:18:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 4546 transitions. [2022-12-13 11:18:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-12-13 11:18:23,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:18:23,623 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 119, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:18:23,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:18:23,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:18:23,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:18:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:18:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1358619365, now seen corresponding path program 2 times [2022-12-13 11:18:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:18:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383189412] [2022-12-13 11:18:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:18:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:18:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:18:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 11:18:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:18:57,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-12-13 11:18:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:18:57,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-12-13 11:18:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:18:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 4886 proven. 17532 refuted. 0 times theorem prover too weak. 2498 trivial. 0 not checked. [2022-12-13 11:18:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:18:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383189412] [2022-12-13 11:18:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383189412] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:18:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14735236] [2022-12-13 11:18:58,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:18:58,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:18:58,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:18:58,710 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:18:58,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63ce52bd-ea50-40d7-b501-06842b9807aa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:18:59,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:18:59,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:18:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 427 conjunts are in the unsatisfiable core [2022-12-13 11:18:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:18:59,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 11:19:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:19:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:19:00,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-12-13 11:19:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:19:00,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-12-13 11:19:00,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:00,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:01,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 11:19:02,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-12-13 11:19:02,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:19:02,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-12-13 11:19:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24916 backedges. 117 proven. 22417 refuted. 0 times theorem prover too weak. 2382 trivial. 0 not checked. [2022-12-13 11:19:09,633 INFO L328 TraceCheckSpWp]: Computing backward predicates...