./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:33:33,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:33:33,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:33:33,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:33:33,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:33:33,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:33:33,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:33:33,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:33:33,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:33:33,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:33:33,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:33:33,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:33:33,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:33:33,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:33:33,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:33:33,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:33:33,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:33:33,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:33:33,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:33:33,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:33:33,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:33:33,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:33:33,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:33:33,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:33:33,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:33:33,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:33:33,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:33:33,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:33:33,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:33:33,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:33:33,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:33:33,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:33:33,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:33:33,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:33:33,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:33:33,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:33:33,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:33:33,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:33:33,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:33:33,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:33:33,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:33:33,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:33:33,606 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:33:33,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:33:33,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:33:33,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:33:33,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:33:33,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:33:33,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:33:33,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:33:33,614 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:33:33,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:33:33,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:33:33,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:33:33,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:33:33,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:33:33,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:33:33,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:33:33,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:33:33,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:33:33,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:33:33,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:33:33,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:33:33,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:33:33,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:33:33,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:33:33,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:33,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:33:33,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:33:33,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:33:33,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:33:33,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:33:33,621 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:33:33,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:33:33,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:33:33,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-11-18 18:33:33,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:33:33,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:33:33,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:33:33,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:33:33,925 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:33:33,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/loops/vogal-1.i [2022-11-18 18:33:34,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/data/4ef7e6e77/a41c2a6d88b744a290858983e82ec711/FLAGe3bdf56f8 [2022-11-18 18:33:34,626 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:33:34,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/sv-benchmarks/c/loops/vogal-1.i [2022-11-18 18:33:34,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/data/4ef7e6e77/a41c2a6d88b744a290858983e82ec711/FLAGe3bdf56f8 [2022-11-18 18:33:34,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/data/4ef7e6e77/a41c2a6d88b744a290858983e82ec711 [2022-11-18 18:33:34,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:33:34,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:33:34,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:34,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:33:34,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:33:34,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:34" (1/1) ... [2022-11-18 18:33:34,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b11906e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:34, skipping insertion in model container [2022-11-18 18:33:34,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:34" (1/1) ... [2022-11-18 18:33:34,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:33:34,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:33:35,207 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-18 18:33:35,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:35,274 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:33:35,293 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-18 18:33:35,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:35,331 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:33:35,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35 WrapperNode [2022-11-18 18:33:35,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:35,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:35,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:33:35,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:33:35,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,391 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-11-18 18:33:35,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:35,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:33:35,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:33:35,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:33:35,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:33:35,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:33:35,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:33:35,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:33:35,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (1/1) ... [2022-11-18 18:33:35,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:35,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:33:35,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:33:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:33:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:33:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:33:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:33:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:33:35,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:33:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:33:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:33:35,613 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:33:35,616 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:33:35,858 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:33:35,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:33:35,865 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 18:33:35,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:35 BoogieIcfgContainer [2022-11-18 18:33:35,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:33:35,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:33:35,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:33:35,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:33:35,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:33:34" (1/3) ... [2022-11-18 18:33:35,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3453f07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:35, skipping insertion in model container [2022-11-18 18:33:35,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:35" (2/3) ... [2022-11-18 18:33:35,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3453f07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:35, skipping insertion in model container [2022-11-18 18:33:35,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:35" (3/3) ... [2022-11-18 18:33:35,878 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-11-18 18:33:35,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:33:35,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:33:35,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:33:36,006 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;@28f1f94c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:33:36,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:33:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:33:36,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:36,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:36,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-11-18 18:33:36,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:36,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590792373] [2022-11-18 18:33:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:36,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590792373] [2022-11-18 18:33:36,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590792373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:36,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:36,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:33:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092036017] [2022-11-18 18:33:36,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:36,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:33:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:33:36,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:33:36,336 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:36,355 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-11-18 18:33:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:33:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 18:33:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:36,368 INFO L225 Difference]: With dead ends: 54 [2022-11-18 18:33:36,369 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 18:33:36,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:33:36,382 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:36,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:33:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 18:33:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-18 18:33:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-18 18:33:36,435 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-11-18 18:33:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:36,436 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-18 18:33:36,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-18 18:33:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:33:36,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:36,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:36,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:33:36,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-11-18 18:33:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:36,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996900726] [2022-11-18 18:33:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996900726] [2022-11-18 18:33:36,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996900726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:36,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:36,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:36,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304828435] [2022-11-18 18:33:36,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:36,684 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:36,773 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-18 18:33:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 18:33:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:36,776 INFO L225 Difference]: With dead ends: 64 [2022-11-18 18:33:36,777 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 18:33:36,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:36,780 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:36,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:33:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 18:33:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-11-18 18:33:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-18 18:33:36,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-11-18 18:33:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-18 18:33:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-18 18:33:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:33:36,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:36,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:36,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:33:36,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:36,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-11-18 18:33:36,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:36,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247281117] [2022-11-18 18:33:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:36,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247281117] [2022-11-18 18:33:36,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247281117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406383363] [2022-11-18 18:33:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:36,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:36,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:37,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:33:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:33:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:37,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:37,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406383363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:37,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:37,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-18 18:33:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066360411] [2022-11-18 18:33:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:33:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:33:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:37,213 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:37,263 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-11-18 18:33:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:33:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 18:33:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:37,265 INFO L225 Difference]: With dead ends: 52 [2022-11-18 18:33:37,265 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 18:33:37,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:33:37,266 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:37,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:33:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 18:33:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-11-18 18:33:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-11-18 18:33:37,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2022-11-18 18:33:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:37,274 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-11-18 18:33:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-11-18 18:33:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:33:37,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:37,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:37,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:37,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:37,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2022-11-18 18:33:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:37,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535443397] [2022-11-18 18:33:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:33:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535443397] [2022-11-18 18:33:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535443397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269473566] [2022-11-18 18:33:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:37,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:37,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:33:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:37,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:33:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:33:37,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:37,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269473566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:37,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:37,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-18 18:33:37,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697529745] [2022-11-18 18:33:37,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:37,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:33:37,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:37,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:33:37,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:37,847 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:37,934 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-11-18 18:33:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:33:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:33:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:37,937 INFO L225 Difference]: With dead ends: 97 [2022-11-18 18:33:37,937 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 18:33:37,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:37,938 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:37,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 73 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:33:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 18:33:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-11-18 18:33:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-18 18:33:37,949 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2022-11-18 18:33:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:37,950 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-18 18:33:37,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-18 18:33:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 18:33:37,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:37,951 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:37,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 18:33:38,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:38,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2022-11-18 18:33:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354974090] [2022-11-18 18:33:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:38,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:33:38,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:38,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354974090] [2022-11-18 18:33:38,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354974090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:38,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481308924] [2022-11-18 18:33:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:38,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:38,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:38,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:38,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:33:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:38,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:33:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:38,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 18:33:38,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 18:33:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:33:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:33:38,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481308924] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:38,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:33:38,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 8] total 12 [2022-11-18 18:33:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514019849] [2022-11-18 18:33:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:38,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:33:38,802 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:38,992 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-11-18 18:33:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:33:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 18:33:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:38,993 INFO L225 Difference]: With dead ends: 61 [2022-11-18 18:33:38,993 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 18:33:38,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:33:38,995 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:38,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:33:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 18:33:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-18 18:33:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-11-18 18:33:39,002 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-11-18 18:33:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:39,002 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-11-18 18:33:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-11-18 18:33:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:33:39,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:39,004 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:39,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:39,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2022-11-18 18:33:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:39,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217100468] [2022-11-18 18:33:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:33:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:39,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217100468] [2022-11-18 18:33:39,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217100468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:39,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22026448] [2022-11-18 18:33:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:39,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:39,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:39,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:39,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:33:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:39,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:33:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:39,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 18:33:39,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 18:33:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:33:39,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:33:39,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22026448] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:39,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:33:39,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 8] total 12 [2022-11-18 18:33:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462682883] [2022-11-18 18:33:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:33:39,781 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:39,995 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-11-18 18:33:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:33:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 18:33:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:39,999 INFO L225 Difference]: With dead ends: 66 [2022-11-18 18:33:39,999 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 18:33:39,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:33:40,000 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:40,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:33:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 18:33:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-11-18 18:33:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-11-18 18:33:40,014 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2022-11-18 18:33:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:40,014 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-11-18 18:33:40,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-11-18 18:33:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:33:40,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:40,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:40,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:40,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2022-11-18 18:33:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684102766] [2022-11-18 18:33:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 18:33:40,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684102766] [2022-11-18 18:33:40,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684102766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330744119] [2022-11-18 18:33:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:40,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:40,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:40,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:33:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 18:33:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 18:33:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 18:33:40,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330744119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:40,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:40,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-11-18 18:33:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609950930] [2022-11-18 18:33:40,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:40,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:33:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:33:40,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:33:40,468 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:40,744 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2022-11-18 18:33:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:33:40,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 18:33:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:40,750 INFO L225 Difference]: With dead ends: 220 [2022-11-18 18:33:40,750 INFO L226 Difference]: Without dead ends: 183 [2022-11-18 18:33:40,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:33:40,752 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 203 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:40,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 185 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:33:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-18 18:33:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2022-11-18 18:33:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-18 18:33:40,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2022-11-18 18:33:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:40,781 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-18 18:33:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-18 18:33:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 18:33:40,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:40,787 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:40,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:40,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:40,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:40,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2022-11-18 18:33:40,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:40,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108183827] [2022-11-18 18:33:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:40,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:33:41,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108183827] [2022-11-18 18:33:41,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108183827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957531300] [2022-11-18 18:33:41,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:33:41,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:41,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:41,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:33:41,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:33:41,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:33:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:33:41,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:33:41,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957531300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:41,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:41,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2022-11-18 18:33:41,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030832245] [2022-11-18 18:33:41,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:41,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:33:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:33:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:33:41,321 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:42,106 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2022-11-18 18:33:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:33:42,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-18 18:33:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:42,108 INFO L225 Difference]: With dead ends: 390 [2022-11-18 18:33:42,109 INFO L226 Difference]: Without dead ends: 349 [2022-11-18 18:33:42,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:33:42,110 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 684 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:42,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 274 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:33:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-18 18:33:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2022-11-18 18:33:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-11-18 18:33:42,127 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2022-11-18 18:33:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:42,128 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-11-18 18:33:42,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-11-18 18:33:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 18:33:42,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:42,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:42,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:42,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:33:42,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2022-11-18 18:33:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:42,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971816496] [2022-11-18 18:33:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:42,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:33:42,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971816496] [2022-11-18 18:33:42,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971816496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610835211] [2022-11-18 18:33:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:42,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:42,471 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:42,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:33:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:33:42,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 18:33:42,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:42,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610835211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:42,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:42,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-18 18:33:42,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829142959] [2022-11-18 18:33:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:42,581 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:42,630 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-11-18 18:33:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 18:33:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:42,632 INFO L225 Difference]: With dead ends: 94 [2022-11-18 18:33:42,632 INFO L226 Difference]: Without dead ends: 64 [2022-11-18 18:33:42,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:42,635 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:42,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:33:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-18 18:33:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-18 18:33:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-11-18 18:33:42,660 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2022-11-18 18:33:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:42,660 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-11-18 18:33:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-11-18 18:33:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 18:33:42,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:42,664 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:42,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:42,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:42,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:42,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2022-11-18 18:33:42,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261729858] [2022-11-18 18:33:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 18:33:43,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261729858] [2022-11-18 18:33:43,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261729858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686410987] [2022-11-18 18:33:43,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:33:43,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:43,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:43,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:33:43,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:33:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:43,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:33:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:43,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:33:43,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:33:43,432 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 17 treesize of output 10 [2022-11-18 18:33:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:33:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:43,664 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 18:33:43,664 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 20 treesize of output 1 [2022-11-18 18:33:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:33:43,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686410987] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:43,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:33:43,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2022-11-18 18:33:43,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858210042] [2022-11-18 18:33:43,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:43,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:33:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:33:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:33:43,671 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:43,841 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-18 18:33:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:33:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-18 18:33:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:43,843 INFO L225 Difference]: With dead ends: 90 [2022-11-18 18:33:43,843 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 18:33:43,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:33:43,845 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:43,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 83 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:33:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 18:33:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-11-18 18:33:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-18 18:33:43,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2022-11-18 18:33:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:43,875 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-18 18:33:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-18 18:33:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 18:33:43,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:43,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:43,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 18:33:44,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:44,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2022-11-18 18:33:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:44,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821792834] [2022-11-18 18:33:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:44,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:33:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821792834] [2022-11-18 18:33:44,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821792834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:44,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035301353] [2022-11-18 18:33:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:44,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:44,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:44,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:33:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 18:33:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:33:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 18:33:44,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035301353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:44,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:44,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-11-18 18:33:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560668166] [2022-11-18 18:33:44,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:44,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:33:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:33:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:33:44,670 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:45,783 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2022-11-18 18:33:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 18:33:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-18 18:33:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:45,786 INFO L225 Difference]: With dead ends: 432 [2022-11-18 18:33:45,787 INFO L226 Difference]: Without dead ends: 382 [2022-11-18 18:33:45,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 18:33:45,791 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 686 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:45,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 848 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:33:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-18 18:33:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2022-11-18 18:33:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-11-18 18:33:45,825 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2022-11-18 18:33:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:45,828 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-11-18 18:33:45,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-11-18 18:33:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 18:33:45,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:45,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:45,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:46,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2022-11-18 18:33:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:46,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343242429] [2022-11-18 18:33:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:33:46,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343242429] [2022-11-18 18:33:46,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343242429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834301324] [2022-11-18 18:33:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:46,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:46,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:46,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:46,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:33:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 18:33:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:46,574 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 18:33:46,575 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 26 treesize of output 10 [2022-11-18 18:33:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 18:33:46,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:46,929 INFO L321 Elim1Store]: treesize reduction 4, result has 96.6 percent of original size [2022-11-18 18:33:46,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-11-18 18:33:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 18:33:47,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834301324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:47,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:47,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-11-18 18:33:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441188552] [2022-11-18 18:33:47,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:47,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 18:33:47,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 18:33:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:33:47,599 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:49,337 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2022-11-18 18:33:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:33:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-18 18:33:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:49,343 INFO L225 Difference]: With dead ends: 549 [2022-11-18 18:33:49,343 INFO L226 Difference]: Without dead ends: 491 [2022-11-18 18:33:49,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 18:33:49,345 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 704 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:49,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 573 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:33:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-18 18:33:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2022-11-18 18:33:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-11-18 18:33:49,385 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2022-11-18 18:33:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:49,386 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-11-18 18:33:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-11-18 18:33:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 18:33:49,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:49,387 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:49,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 18:33:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:49,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2022-11-18 18:33:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744379840] [2022-11-18 18:33:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 18:33:49,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:49,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744379840] [2022-11-18 18:33:49,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744379840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:49,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855125809] [2022-11-18 18:33:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:49,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:49,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:49,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:49,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:33:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:33:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:50,080 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:33:50,081 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 27 treesize of output 15 [2022-11-18 18:33:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:33:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:50,418 INFO L321 Elim1Store]: treesize reduction 11, result has 90.7 percent of original size [2022-11-18 18:33:50,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-11-18 18:33:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:33:51,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855125809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:51,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:51,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2022-11-18 18:33:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502635947] [2022-11-18 18:33:51,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:51,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:33:51,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:33:51,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:33:51,100 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:51,958 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2022-11-18 18:33:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 18:33:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-18 18:33:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:51,960 INFO L225 Difference]: With dead ends: 313 [2022-11-18 18:33:51,960 INFO L226 Difference]: Without dead ends: 241 [2022-11-18 18:33:51,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:33:51,962 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 229 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:51,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 294 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:33:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-18 18:33:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2022-11-18 18:33:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2022-11-18 18:33:52,012 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2022-11-18 18:33:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:52,013 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2022-11-18 18:33:52,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2022-11-18 18:33:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:33:52,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:52,014 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:52,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:52,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:33:52,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2022-11-18 18:33:52,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:52,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747335432] [2022-11-18 18:33:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:33:52,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747335432] [2022-11-18 18:33:52,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747335432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669094906] [2022-11-18 18:33:52,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:33:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:52,715 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:52,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:33:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:33:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:33:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 18:33:53,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:33:53,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669094906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:53,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:53,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2022-11-18 18:33:53,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477077974] [2022-11-18 18:33:53,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:53,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:33:53,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:33:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:33:53,197 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:54,652 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2022-11-18 18:33:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:33:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 18:33:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:54,655 INFO L225 Difference]: With dead ends: 537 [2022-11-18 18:33:54,655 INFO L226 Difference]: Without dead ends: 531 [2022-11-18 18:33:54,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 18:33:54,657 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 544 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:54,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1137 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:33:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-18 18:33:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2022-11-18 18:33:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2022-11-18 18:33:54,768 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2022-11-18 18:33:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:54,769 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2022-11-18 18:33:54,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2022-11-18 18:33:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:33:54,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:54,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:54,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 18:33:54,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:33:54,976 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-11-18 18:33:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423524839] [2022-11-18 18:33:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 18:33:56,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:56,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423524839] [2022-11-18 18:33:56,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423524839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:56,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294566168] [2022-11-18 18:33:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:56,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:56,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:56,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:56,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:33:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 18:33:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:03,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:03,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-11-18 18:34:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 18:34:03,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:07,765 INFO L321 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-18 18:34:07,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-18 18:34:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:34:07,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294566168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:07,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:07,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 13] total 31 [2022-11-18 18:34:07,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896955345] [2022-11-18 18:34:07,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 18:34:07,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 18:34:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-18 18:34:07,779 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:19,620 INFO L93 Difference]: Finished difference Result 498 states and 654 transitions. [2022-11-18 18:34:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 18:34:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 18:34:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:19,623 INFO L225 Difference]: With dead ends: 498 [2022-11-18 18:34:19,623 INFO L226 Difference]: Without dead ends: 398 [2022-11-18 18:34:19,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=487, Invalid=2593, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 18:34:19,626 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:19,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 288 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-11-18 18:34:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-18 18:34:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 247. [2022-11-18 18:34:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.3008130081300813) internal successors, (320), 246 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2022-11-18 18:34:19,734 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 46 [2022-11-18 18:34:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:19,735 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2022-11-18 18:34:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2022-11-18 18:34:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:34:19,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:19,736 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:19,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:19,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:34:19,942 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-11-18 18:34:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112906231] [2022-11-18 18:34:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:34:21,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:21,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112906231] [2022-11-18 18:34:21,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112906231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:21,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816670495] [2022-11-18 18:34:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:21,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:21,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:21,324 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:21,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:34:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:21,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 18:34:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:27,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:27,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-18 18:34:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 18:34:29,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:31,017 INFO L321 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-18 18:34:31,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-18 18:34:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:34:31,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816670495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:31,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:31,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 31 [2022-11-18 18:34:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651355107] [2022-11-18 18:34:31,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:31,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 18:34:31,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:31,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 18:34:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-11-18 18:34:31,026 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:40,442 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:34:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:41,910 INFO L93 Difference]: Finished difference Result 523 states and 699 transitions. [2022-11-18 18:34:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 18:34:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 18:34:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:41,913 INFO L225 Difference]: With dead ends: 523 [2022-11-18 18:34:41,913 INFO L226 Difference]: Without dead ends: 483 [2022-11-18 18:34:41,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 18:34:41,916 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 220 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:41,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 230 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 241 Invalid, 0 Unknown, 285 Unchecked, 0.4s Time] [2022-11-18 18:34:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-18 18:34:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 377. [2022-11-18 18:34:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.300531914893617) internal successors, (489), 376 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 489 transitions. [2022-11-18 18:34:42,102 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 489 transitions. Word has length 46 [2022-11-18 18:34:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:42,104 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 489 transitions. [2022-11-18 18:34:42,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 489 transitions. [2022-11-18 18:34:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:34:42,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:42,106 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:42,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:34:42,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2022-11-18 18:34:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:42,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800945386] [2022-11-18 18:34:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:34:44,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:44,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800945386] [2022-11-18 18:34:44,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800945386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:44,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993424646] [2022-11-18 18:34:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:44,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:44,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:34:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:34:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:34:45,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:34:45,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:45,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-11-18 18:34:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:34:45,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:46,028 INFO L321 Elim1Store]: treesize reduction 26, result has 68.3 percent of original size [2022-11-18 18:34:46,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 63 [2022-11-18 18:34:46,122 INFO L321 Elim1Store]: treesize reduction 25, result has 72.5 percent of original size [2022-11-18 18:34:46,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-11-18 18:34:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:34:46,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993424646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:46,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:46,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2022-11-18 18:34:46,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815925980] [2022-11-18 18:34:46,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:46,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 18:34:46,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 18:34:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:34:46,331 INFO L87 Difference]: Start difference. First operand 377 states and 489 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:47,916 INFO L93 Difference]: Finished difference Result 1025 states and 1344 transitions. [2022-11-18 18:34:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:34:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 18:34:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:47,920 INFO L225 Difference]: With dead ends: 1025 [2022-11-18 18:34:47,920 INFO L226 Difference]: Without dead ends: 599 [2022-11-18 18:34:47,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 18:34:47,922 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:47,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 264 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 303 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-11-18 18:34:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-18 18:34:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 532. [2022-11-18 18:34:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.2937853107344632) internal successors, (687), 531 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 687 transitions. [2022-11-18 18:34:48,126 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 687 transitions. Word has length 46 [2022-11-18 18:34:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:48,126 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 687 transitions. [2022-11-18 18:34:48,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 687 transitions. [2022-11-18 18:34:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:34:48,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:48,128 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:48,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:48,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:48,331 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash -661577384, now seen corresponding path program 1 times [2022-11-18 18:34:48,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:48,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411997540] [2022-11-18 18:34:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:34:50,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411997540] [2022-11-18 18:34:50,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411997540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207682674] [2022-11-18 18:34:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:50,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:50,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:50,612 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:50,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:34:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 18:34:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:34:51,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:34:51,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:51,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-11-18 18:34:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 18:34:51,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:51,872 INFO L321 Elim1Store]: treesize reduction 17, result has 81.3 percent of original size [2022-11-18 18:34:51,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-11-18 18:34:51,994 INFO L321 Elim1Store]: treesize reduction 17, result has 79.3 percent of original size [2022-11-18 18:34:51,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 72 [2022-11-18 18:34:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:34:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207682674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:52,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:52,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-11-18 18:34:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707986512] [2022-11-18 18:34:52,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:52,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:34:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:34:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:34:52,089 INFO L87 Difference]: Start difference. First operand 532 states and 687 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:53,801 INFO L93 Difference]: Finished difference Result 785 states and 1012 transitions. [2022-11-18 18:34:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:34:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 18:34:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:53,810 INFO L225 Difference]: With dead ends: 785 [2022-11-18 18:34:53,810 INFO L226 Difference]: Without dead ends: 589 [2022-11-18 18:34:53,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:34:53,812 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:53,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 189 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 303 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2022-11-18 18:34:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-18 18:34:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 361. [2022-11-18 18:34:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.288888888888889) internal successors, (464), 360 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 464 transitions. [2022-11-18 18:34:53,966 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 464 transitions. Word has length 46 [2022-11-18 18:34:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:53,966 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 464 transitions. [2022-11-18 18:34:53,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 464 transitions. [2022-11-18 18:34:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:34:53,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:53,968 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:53,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:54,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:34:54,174 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:54,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1978872450, now seen corresponding path program 1 times [2022-11-18 18:34:54,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:54,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606034395] [2022-11-18 18:34:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:54,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 18:34:54,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:54,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606034395] [2022-11-18 18:34:54,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606034395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:54,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509334060] [2022-11-18 18:34:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:54,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:54,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:54,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:54,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:34:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 18:34:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:34:54,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 18:34:54,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509334060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:54,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:54,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-11-18 18:34:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345519432] [2022-11-18 18:34:54,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:34:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:34:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:34:54,715 INFO L87 Difference]: Start difference. First operand 361 states and 464 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:55,225 INFO L93 Difference]: Finished difference Result 832 states and 1064 transitions. [2022-11-18 18:34:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:34:55,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-18 18:34:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:55,228 INFO L225 Difference]: With dead ends: 832 [2022-11-18 18:34:55,228 INFO L226 Difference]: Without dead ends: 506 [2022-11-18 18:34:55,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:34:55,229 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:55,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 188 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:34:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-18 18:34:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2022-11-18 18:34:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.2786458333333333) internal successors, (491), 384 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 491 transitions. [2022-11-18 18:34:55,438 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 491 transitions. Word has length 55 [2022-11-18 18:34:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:55,438 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 491 transitions. [2022-11-18 18:34:55,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 491 transitions. [2022-11-18 18:34:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 18:34:55,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:55,440 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:55,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:55,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:55,646 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 2 times [2022-11-18 18:34:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:55,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266807875] [2022-11-18 18:34:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:55,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 18:34:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:56,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266807875] [2022-11-18 18:34:56,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266807875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:56,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796550368] [2022-11-18 18:34:56,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:34:56,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:56,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:56,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:56,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:34:56,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:34:56,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 18:34:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:02,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:02,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-18 18:35:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:35:09,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:35:11,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796550368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:11,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:11,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-11-18 18:35:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648811530] [2022-11-18 18:35:11,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:11,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 18:35:11,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 18:35:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:35:11,186 INFO L87 Difference]: Start difference. First operand 385 states and 491 transitions. Second operand has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:22,472 INFO L93 Difference]: Finished difference Result 705 states and 916 transitions. [2022-11-18 18:35:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 18:35:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-18 18:35:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:22,474 INFO L225 Difference]: With dead ends: 705 [2022-11-18 18:35:22,474 INFO L226 Difference]: Without dead ends: 615 [2022-11-18 18:35:22,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=994, Invalid=7196, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 18:35:22,477 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 286 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:22,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 351 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 416 Invalid, 0 Unknown, 312 Unchecked, 0.5s Time] [2022-11-18 18:35:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-18 18:35:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 467. [2022-11-18 18:35:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.2918454935622317) internal successors, (602), 466 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 602 transitions. [2022-11-18 18:35:22,709 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 602 transitions. Word has length 56 [2022-11-18 18:35:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:22,710 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 602 transitions. [2022-11-18 18:35:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 602 transitions. [2022-11-18 18:35:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 18:35:22,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:22,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:22,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:22,918 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2022-11-18 18:35:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:22,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532538664] [2022-11-18 18:35:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 18:35:26,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:26,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532538664] [2022-11-18 18:35:26,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532538664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:26,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62601496] [2022-11-18 18:35:26,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:35:26,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:26,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:26,599 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:35:26,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:35:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:35:26,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:27,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 18:35:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 18:35:27,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:27,390 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 18:35:27,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-11-18 18:35:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 18:35:27,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62601496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:27,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:27,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9] total 33 [2022-11-18 18:35:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268970863] [2022-11-18 18:35:27,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 18:35:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 18:35:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 18:35:27,462 INFO L87 Difference]: Start difference. First operand 467 states and 602 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:30,821 INFO L93 Difference]: Finished difference Result 1553 states and 2055 transitions. [2022-11-18 18:35:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 18:35:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-18 18:35:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:30,827 INFO L225 Difference]: With dead ends: 1553 [2022-11-18 18:35:30,827 INFO L226 Difference]: Without dead ends: 1549 [2022-11-18 18:35:30,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=579, Invalid=2727, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 18:35:30,829 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 817 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:30,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 358 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:35:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-11-18 18:35:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 485. [2022-11-18 18:35:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.2789256198347108) internal successors, (619), 484 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 619 transitions. [2022-11-18 18:35:31,117 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 619 transitions. Word has length 57 [2022-11-18 18:35:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:31,117 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 619 transitions. [2022-11-18 18:35:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 619 transitions. [2022-11-18 18:35:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 18:35:31,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:31,119 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:31,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:31,324 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash -793949111, now seen corresponding path program 4 times [2022-11-18 18:35:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:31,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477809135] [2022-11-18 18:35:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 18:35:31,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:31,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477809135] [2022-11-18 18:35:31,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477809135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524182184] [2022-11-18 18:35:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:35:31,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:31,608 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:31,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 18:35:31,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:35:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:35:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 18:35:31,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 18:35:32,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524182184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:32,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:32,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 23 [2022-11-18 18:35:32,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849731254] [2022-11-18 18:35:32,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:32,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:35:32,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:35:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:35:32,263 INFO L87 Difference]: Start difference. First operand 485 states and 619 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:43,691 INFO L93 Difference]: Finished difference Result 4675 states and 6330 transitions. [2022-11-18 18:35:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-18 18:35:43,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-18 18:35:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:43,705 INFO L225 Difference]: With dead ends: 4675 [2022-11-18 18:35:43,705 INFO L226 Difference]: Without dead ends: 4227 [2022-11-18 18:35:43,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4131 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1811, Invalid=9109, Unknown=0, NotChecked=0, Total=10920 [2022-11-18 18:35:43,710 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1452 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:43,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 700 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:35:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2022-11-18 18:35:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 1096. [2022-11-18 18:35:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 1.2767123287671234) internal successors, (1398), 1095 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1398 transitions. [2022-11-18 18:35:44,567 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1398 transitions. Word has length 58 [2022-11-18 18:35:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:44,567 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1398 transitions. [2022-11-18 18:35:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1398 transitions. [2022-11-18 18:35:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:35:44,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:44,569 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:44,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:44,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 18:35:44,773 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash 168090165, now seen corresponding path program 5 times [2022-11-18 18:35:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:44,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129530746] [2022-11-18 18:35:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:44,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 18:35:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129530746] [2022-11-18 18:35:45,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129530746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:45,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037850510] [2022-11-18 18:35:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:35:45,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:45,171 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:45,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 18:35:47,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 18:35:47,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 18:35:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:47,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:35:48,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 18:35:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:35:48,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 18:35:49,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037850510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:49,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:49,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 15] total 45 [2022-11-18 18:35:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796910253] [2022-11-18 18:35:49,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 18:35:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:49,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 18:35:49,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 18:35:49,520 INFO L87 Difference]: Start difference. First operand 1096 states and 1398 transitions. Second operand has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:32,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:37:32,095 INFO L93 Difference]: Finished difference Result 26716 states and 36928 transitions. [2022-11-18 18:37:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 553 states. [2022-11-18 18:37:32,095 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-18 18:37:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:37:32,174 INFO L225 Difference]: With dead ends: 26716 [2022-11-18 18:37:32,175 INFO L226 Difference]: Without dead ends: 25143 [2022-11-18 18:37:32,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 574 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147487 ImplicationChecksByTransitivity, 65.7s TimeCoverageRelationStatistics Valid=14450, Invalid=316750, Unknown=0, NotChecked=0, Total=331200 [2022-11-18 18:37:32,222 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 4427 mSDsluCounter, 15625 mSDsCounter, 0 mSdLazyCounter, 21980 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4427 SdHoareTripleChecker+Valid, 16595 SdHoareTripleChecker+Invalid, 22479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 21980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:37:32,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4427 Valid, 16595 Invalid, 22479 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [499 Valid, 21980 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2022-11-18 18:37:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25143 states. [2022-11-18 18:37:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25143 to 1816. [2022-11-18 18:37:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 1.2826446280991735) internal successors, (2328), 1815 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2328 transitions. [2022-11-18 18:37:34,064 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2328 transitions. Word has length 66 [2022-11-18 18:37:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:37:34,065 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 2328 transitions. [2022-11-18 18:37:34,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 45 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2328 transitions. [2022-11-18 18:37:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 18:37:34,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:37:34,069 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:34,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:37:34,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 18:37:34,277 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:37:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 6 times [2022-11-18 18:37:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:34,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69064515] [2022-11-18 18:37:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:34,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 18:37:37,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69064515] [2022-11-18 18:37:37,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69064515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117183402] [2022-11-18 18:37:37,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:37:37,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:37,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:37,787 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:37,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 18:37:38,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 18:37:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:37:38,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:37:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:38,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:37:38,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:38,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:37:38,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 13 [2022-11-18 18:37:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 18:37:38,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:39,641 INFO L321 Elim1Store]: treesize reduction 60, result has 50.8 percent of original size [2022-11-18 18:37:39,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 87 [2022-11-18 18:37:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 18:37:39,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117183402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:39,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:39,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 37 [2022-11-18 18:37:39,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267486942] [2022-11-18 18:37:39,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:39,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 18:37:39,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 18:37:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 18:37:39,841 INFO L87 Difference]: Start difference. First operand 1816 states and 2328 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:37:49,453 INFO L93 Difference]: Finished difference Result 4754 states and 6325 transitions. [2022-11-18 18:37:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 18:37:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-18 18:37:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:37:49,460 INFO L225 Difference]: With dead ends: 4754 [2022-11-18 18:37:49,461 INFO L226 Difference]: Without dead ends: 4440 [2022-11-18 18:37:49,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1124, Invalid=6186, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 18:37:49,464 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 742 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:37:49,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 637 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:37:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2022-11-18 18:37:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3183. [2022-11-18 18:37:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 3182 states have (on average 1.2900691389063481) internal successors, (4105), 3182 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:52,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4105 transitions. [2022-11-18 18:37:52,271 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4105 transitions. Word has length 67 [2022-11-18 18:37:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:37:52,272 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 4105 transitions. [2022-11-18 18:37:52,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4105 transitions. [2022-11-18 18:37:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 18:37:52,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:37:52,279 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:52,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-18 18:37:52,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:52,485 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:37:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 7 times [2022-11-18 18:37:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271518091] [2022-11-18 18:37:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 18:37:56,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271518091] [2022-11-18 18:37:56,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271518091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415940534] [2022-11-18 18:37:56,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:37:56,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:56,165 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:56,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 18:37:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 18:37:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:57,304 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-18 18:37:57,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-11-18 18:37:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 18:37:57,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:58,281 INFO L321 Elim1Store]: treesize reduction 26, result has 68.3 percent of original size [2022-11-18 18:37:58,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-11-18 18:37:58,370 INFO L321 Elim1Store]: treesize reduction 25, result has 72.5 percent of original size [2022-11-18 18:37:58,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 73 [2022-11-18 18:37:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:37:58,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415940534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:58,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:58,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 44 [2022-11-18 18:37:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043456392] [2022-11-18 18:37:58,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:58,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 18:37:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 18:37:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 18:37:58,746 INFO L87 Difference]: Start difference. First operand 3183 states and 4105 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:09,900 INFO L93 Difference]: Finished difference Result 5775 states and 7477 transitions. [2022-11-18 18:38:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 18:38:09,901 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-18 18:38:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:09,907 INFO L225 Difference]: With dead ends: 5775 [2022-11-18 18:38:09,907 INFO L226 Difference]: Without dead ends: 3884 [2022-11-18 18:38:09,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=875, Invalid=5287, Unknown=0, NotChecked=0, Total=6162 [2022-11-18 18:38:09,912 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 725 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:09,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 888 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1567 Invalid, 0 Unknown, 167 Unchecked, 1.7s Time] [2022-11-18 18:38:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-11-18 18:38:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2879. [2022-11-18 18:38:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 1.2564280750521195) internal successors, (3616), 2878 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 3616 transitions. [2022-11-18 18:38:12,343 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 3616 transitions. Word has length 67 [2022-11-18 18:38:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:12,343 INFO L495 AbstractCegarLoop]: Abstraction has 2879 states and 3616 transitions. [2022-11-18 18:38:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 3616 transitions. [2022-11-18 18:38:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 18:38:12,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:12,349 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:12,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:12,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:12,554 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 8 times [2022-11-18 18:38:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:12,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822469770] [2022-11-18 18:38:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 18:38:15,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822469770] [2022-11-18 18:38:15,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822469770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716807416] [2022-11-18 18:38:15,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:38:15,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:15,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:15,767 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:15,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 18:38:15,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:38:15,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:15,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 18:38:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:16,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:38:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:38:16,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:38:16,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 14 [2022-11-18 18:38:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 18:38:16,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:17,178 INFO L321 Elim1Store]: treesize reduction 13, result has 89.3 percent of original size [2022-11-18 18:38:17,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 138 [2022-11-18 18:38:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 18:38:17,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716807416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:17,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:17,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 35 [2022-11-18 18:38:17,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301360650] [2022-11-18 18:38:17,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:17,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 18:38:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 18:38:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:38:17,778 INFO L87 Difference]: Start difference. First operand 2879 states and 3616 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:25,068 INFO L93 Difference]: Finished difference Result 3739 states and 4711 transitions. [2022-11-18 18:38:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 18:38:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-18 18:38:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:25,073 INFO L225 Difference]: With dead ends: 3739 [2022-11-18 18:38:25,073 INFO L226 Difference]: Without dead ends: 3471 [2022-11-18 18:38:25,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:38:25,076 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 480 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:25,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 522 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:38:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2022-11-18 18:38:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 2840. [2022-11-18 18:38:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.2550193730186685) internal successors, (3563), 2839 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3563 transitions. [2022-11-18 18:38:27,556 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3563 transitions. Word has length 67 [2022-11-18 18:38:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:27,556 INFO L495 AbstractCegarLoop]: Abstraction has 2840 states and 3563 transitions. [2022-11-18 18:38:27,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3563 transitions. [2022-11-18 18:38:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 18:38:27,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:27,561 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:27,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:27,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 18:38:27,766 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 9 times [2022-11-18 18:38:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:27,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420863020] [2022-11-18 18:38:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 18:38:31,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:31,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420863020] [2022-11-18 18:38:31,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420863020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:31,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064529651] [2022-11-18 18:38:31,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:38:31,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:31,257 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:31,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 18:38:31,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:38:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:38:31,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:31,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:38:31,602 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 16 treesize of output 18 [2022-11-18 18:38:31,626 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 16 treesize of output 18 [2022-11-18 18:38:31,659 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 16 treesize of output 18 [2022-11-18 18:38:31,685 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 16 treesize of output 18 [2022-11-18 18:38:31,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-11-18 18:38:31,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-18 18:38:33,331 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:38:33,331 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 34 treesize of output 18 [2022-11-18 18:38:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 18:38:33,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:38:35,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064529651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:35,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:35,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 17] total 53 [2022-11-18 18:38:35,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714881168] [2022-11-18 18:38:35,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:35,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 18:38:35,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 18:38:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 18:38:35,174 INFO L87 Difference]: Start difference. First operand 2840 states and 3563 transitions. Second operand has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:54,912 INFO L93 Difference]: Finished difference Result 4513 states and 5727 transitions. [2022-11-18 18:38:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-18 18:38:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-18 18:38:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:54,918 INFO L225 Difference]: With dead ends: 4513 [2022-11-18 18:38:54,918 INFO L226 Difference]: Without dead ends: 3796 [2022-11-18 18:38:54,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4970 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=2236, Invalid=13264, Unknown=0, NotChecked=0, Total=15500 [2022-11-18 18:38:54,921 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1052 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:54,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 658 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-18 18:38:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2022-11-18 18:38:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 2780. [2022-11-18 18:38:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 1.2558474271320619) internal successors, (3490), 2779 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3490 transitions. [2022-11-18 18:38:57,123 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3490 transitions. Word has length 67 [2022-11-18 18:38:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:57,124 INFO L495 AbstractCegarLoop]: Abstraction has 2780 states and 3490 transitions. [2022-11-18 18:38:57,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3490 transitions. [2022-11-18 18:38:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 18:38:57,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:57,127 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:57,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:57,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 18:38:57,334 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -100514461, now seen corresponding path program 10 times [2022-11-18 18:38:57,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:57,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395699638] [2022-11-18 18:38:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:57,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 18:38:58,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:58,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395699638] [2022-11-18 18:38:58,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395699638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:58,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088814755] [2022-11-18 18:38:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:38:58,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:58,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:58,586 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:58,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 18:38:58,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:38:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 18:38:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 68 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:38:59,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:59,788 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 18:38:59,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2022-11-18 18:38:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 18:38:59,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088814755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:59,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:59,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 11] total 30 [2022-11-18 18:38:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511413536] [2022-11-18 18:38:59,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 18:38:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 18:38:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:38:59,871 INFO L87 Difference]: Start difference. First operand 2780 states and 3490 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:03,669 INFO L93 Difference]: Finished difference Result 3878 states and 4887 transitions. [2022-11-18 18:39:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:39:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-18 18:39:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:03,672 INFO L225 Difference]: With dead ends: 3878 [2022-11-18 18:39:03,673 INFO L226 Difference]: Without dead ends: 3422 [2022-11-18 18:39:03,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:39:03,675 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 290 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:03,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 657 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 809 Invalid, 0 Unknown, 27 Unchecked, 0.6s Time] [2022-11-18 18:39:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-11-18 18:39:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2734. [2022-11-18 18:39:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 1.2568605927552141) internal successors, (3435), 2733 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3435 transitions. [2022-11-18 18:39:05,888 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3435 transitions. Word has length 77 [2022-11-18 18:39:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:05,888 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3435 transitions. [2022-11-18 18:39:05,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3435 transitions. [2022-11-18 18:39:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 18:39:05,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:05,892 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:05,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 18:39:06,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1514679456, now seen corresponding path program 11 times [2022-11-18 18:39:06,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:06,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718039851] [2022-11-18 18:39:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-18 18:39:06,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718039851] [2022-11-18 18:39:06,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718039851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240785230] [2022-11-18 18:39:06,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:39:06,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:06,559 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:06,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 18:39:11,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 18:39:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:39:11,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:39:11,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:11,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:39:11,751 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 15 treesize of output 7 [2022-11-18 18:39:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-18 18:39:11,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 64 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-18 18:39:12,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240785230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:12,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:12,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 34 [2022-11-18 18:39:12,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329358342] [2022-11-18 18:39:12,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:12,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:39:12,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:39:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:39:12,360 INFO L87 Difference]: Start difference. First operand 2734 states and 3435 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:20,012 INFO L93 Difference]: Finished difference Result 6154 states and 7801 transitions. [2022-11-18 18:39:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 18:39:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-18 18:39:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:20,016 INFO L225 Difference]: With dead ends: 6154 [2022-11-18 18:39:20,016 INFO L226 Difference]: Without dead ends: 4136 [2022-11-18 18:39:20,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=467, Invalid=4225, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:39:20,020 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1052 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:20,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1998 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 18:39:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2022-11-18 18:39:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 1512. [2022-11-18 18:39:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.2097948378557246) internal successors, (1828), 1511 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1828 transitions. [2022-11-18 18:39:21,423 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1828 transitions. Word has length 78 [2022-11-18 18:39:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:21,423 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 1828 transitions. [2022-11-18 18:39:21,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1828 transitions. [2022-11-18 18:39:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 18:39:21,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:21,425 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:21,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:21,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 18:39:21,626 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1839805964, now seen corresponding path program 12 times [2022-11-18 18:39:21,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778881983] [2022-11-18 18:39:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 18:39:22,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778881983] [2022-11-18 18:39:22,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778881983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367319771] [2022-11-18 18:39:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:39:22,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:22,295 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:22,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 18:39:22,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 18:39:22,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:39:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:39:22,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 18:39:23,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 18:39:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367319771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:23,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:23,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 26 [2022-11-18 18:39:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518616474] [2022-11-18 18:39:23,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:23,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:39:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:39:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:39:23,673 INFO L87 Difference]: Start difference. First operand 1512 states and 1828 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:30,520 INFO L93 Difference]: Finished difference Result 3916 states and 4927 transitions. [2022-11-18 18:39:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 18:39:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-18 18:39:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:30,524 INFO L225 Difference]: With dead ends: 3916 [2022-11-18 18:39:30,524 INFO L226 Difference]: Without dead ends: 3912 [2022-11-18 18:39:30,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=386, Invalid=4170, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 18:39:30,526 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 709 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:30,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2602 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 18:39:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2022-11-18 18:39:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2017. [2022-11-18 18:39:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 1.2142857142857142) internal successors, (2448), 2016 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2448 transitions. [2022-11-18 18:39:32,424 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2448 transitions. Word has length 88 [2022-11-18 18:39:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:32,424 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 2448 transitions. [2022-11-18 18:39:32,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2448 transitions. [2022-11-18 18:39:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 18:39:32,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:32,427 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:32,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:32,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:32,627 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1581640526, now seen corresponding path program 13 times [2022-11-18 18:39:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500870134] [2022-11-18 18:39:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:32,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 18:39:36,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:36,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500870134] [2022-11-18 18:39:36,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500870134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053167283] [2022-11-18 18:39:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:39:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:36,478 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:36,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 18:39:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:39:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:39:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:39:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:39:38,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:39:38,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:39:38,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 33 [2022-11-18 18:39:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 139 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:39:38,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:39,308 INFO L321 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2022-11-18 18:39:39,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-11-18 18:39:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 18:39:40,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053167283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:40,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:40,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 14] total 48 [2022-11-18 18:39:40,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839981034] [2022-11-18 18:39:40,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 18:39:40,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 18:39:40,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 18:39:40,262 INFO L87 Difference]: Start difference. First operand 2017 states and 2448 transitions. Second operand has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:01,088 INFO L93 Difference]: Finished difference Result 9030 states and 11529 transitions. [2022-11-18 18:40:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 18:40:01,088 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-18 18:40:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:01,099 INFO L225 Difference]: With dead ends: 9030 [2022-11-18 18:40:01,099 INFO L226 Difference]: Without dead ends: 8465 [2022-11-18 18:40:01,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1456, Invalid=9674, Unknown=0, NotChecked=0, Total=11130 [2022-11-18 18:40:01,103 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1351 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:01,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1314 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 18:40:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2022-11-18 18:40:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 2759. [2022-11-18 18:40:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2759 states, 2758 states have (on average 1.1812907904278462) internal successors, (3258), 2758 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3258 transitions. [2022-11-18 18:40:03,946 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3258 transitions. Word has length 88 [2022-11-18 18:40:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:03,946 INFO L495 AbstractCegarLoop]: Abstraction has 2759 states and 3258 transitions. [2022-11-18 18:40:03,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3258 transitions. [2022-11-18 18:40:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 18:40:03,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:03,949 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:03,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 18:40:04,150 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash 240292206, now seen corresponding path program 14 times [2022-11-18 18:40:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:04,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171734131] [2022-11-18 18:40:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 18:40:08,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171734131] [2022-11-18 18:40:08,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171734131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408847234] [2022-11-18 18:40:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:40:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:08,742 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:08,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 18:40:08,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:40:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:40:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 18:40:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:11,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:40:11,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:40:11,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:11,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:40:11,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 33 [2022-11-18 18:40:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 18:40:11,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:12,743 INFO L321 Elim1Store]: treesize reduction 25, result has 73.1 percent of original size [2022-11-18 18:40:12,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 75 [2022-11-18 18:40:12,936 INFO L321 Elim1Store]: treesize reduction 26, result has 69.0 percent of original size [2022-11-18 18:40:12,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 65 [2022-11-18 18:40:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 18:40:13,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408847234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:13,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:40:13,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 18] total 56 [2022-11-18 18:40:13,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053610798] [2022-11-18 18:40:13,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:13,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 18:40:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:13,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 18:40:13,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2742, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 18:40:13,621 INFO L87 Difference]: Start difference. First operand 2759 states and 3258 transitions. Second operand has 56 states, 56 states have (on average 3.1607142857142856) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:52,608 INFO L93 Difference]: Finished difference Result 14021 states and 17184 transitions. [2022-11-18 18:40:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-18 18:40:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.1607142857142856) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-18 18:40:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:52,620 INFO L225 Difference]: With dead ends: 14021 [2022-11-18 18:40:52,620 INFO L226 Difference]: Without dead ends: 11177 [2022-11-18 18:40:52,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 143 SyntacticMatches, 12 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8842 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=3013, Invalid=22109, Unknown=0, NotChecked=0, Total=25122 [2022-11-18 18:40:52,625 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1507 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:52,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 1780 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 2772 Invalid, 0 Unknown, 441 Unchecked, 3.6s Time] [2022-11-18 18:40:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11177 states. [2022-11-18 18:40:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11177 to 4513. [2022-11-18 18:40:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 1.1496010638297873) internal successors, (5187), 4512 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 5187 transitions. [2022-11-18 18:40:57,797 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 5187 transitions. Word has length 88 [2022-11-18 18:40:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:57,797 INFO L495 AbstractCegarLoop]: Abstraction has 4513 states and 5187 transitions. [2022-11-18 18:40:57,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.1607142857142856) internal successors, (177), 56 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 5187 transitions. [2022-11-18 18:40:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 18:40:57,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:57,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:57,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:58,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 18:40:58,013 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:58,013 INFO L85 PathProgramCache]: Analyzing trace with hash 405773490, now seen corresponding path program 15 times [2022-11-18 18:40:58,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:58,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056062886] [2022-11-18 18:40:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:58,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 18:41:01,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:01,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056062886] [2022-11-18 18:41:01,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056062886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:41:01,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937825884] [2022-11-18 18:41:01,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:41:01,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:01,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:01,637 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:01,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 18:41:02,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 18:41:02,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:41:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-18 18:41:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:41:02,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:41:02,306 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 23 treesize of output 23 [2022-11-18 18:41:02,404 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 23 treesize of output 23 [2022-11-18 18:41:02,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:02,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-18 18:41:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:02,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-18 18:41:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:02,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-18 18:41:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:41:10,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:41:10,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:41:10,716 INFO L321 Elim1Store]: treesize reduction 81, result has 27.7 percent of original size [2022-11-18 18:41:10,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 142 treesize of output 84 [2022-11-18 18:41:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 127 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 18:41:10,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 105 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 18:41:23,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937825884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:23,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:41:23,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 41, 35] total 94 [2022-11-18 18:41:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091015218] [2022-11-18 18:41:23,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-18 18:41:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-18 18:41:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=7516, Unknown=0, NotChecked=0, Total=8742 [2022-11-18 18:41:23,468 INFO L87 Difference]: Start difference. First operand 4513 states and 5187 transitions. Second operand has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:15,087 INFO L93 Difference]: Finished difference Result 11213 states and 12742 transitions. [2022-11-18 18:43:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-11-18 18:43:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-18 18:43:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:15,095 INFO L225 Difference]: With dead ends: 11213 [2022-11-18 18:43:15,095 INFO L226 Difference]: Without dead ends: 6711 [2022-11-18 18:43:15,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 135 SyntacticMatches, 39 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44059 ImplicationChecksByTransitivity, 108.2s TimeCoverageRelationStatistics Valid=12963, Invalid=94949, Unknown=0, NotChecked=0, Total=107912 [2022-11-18 18:43:15,103 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1826 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 5316 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 3443 SdHoareTripleChecker+Invalid, 8108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 5316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2609 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:15,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1826 Valid, 3443 Invalid, 8108 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [183 Valid, 5316 Invalid, 0 Unknown, 2609 Unchecked, 7.1s Time] [2022-11-18 18:43:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6711 states. [2022-11-18 18:43:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6711 to 3682. [2022-11-18 18:43:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.121434392828036) internal successors, (4128), 3681 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4128 transitions. [2022-11-18 18:43:19,090 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4128 transitions. Word has length 88 [2022-11-18 18:43:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:19,091 INFO L495 AbstractCegarLoop]: Abstraction has 3682 states and 4128 transitions. [2022-11-18 18:43:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4128 transitions. [2022-11-18 18:43:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 18:43:19,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:19,099 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:19,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:19,307 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash -16119442, now seen corresponding path program 16 times [2022-11-18 18:43:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684855333] [2022-11-18 18:43:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 18:43:24,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:24,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684855333] [2022-11-18 18:43:24,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684855333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:24,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287033855] [2022-11-18 18:43:24,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:43:24,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:24,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:24,158 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:24,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 18:43:24,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:43:24,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:43:24,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 18:43:24,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:43:26,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:43:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:43:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:43:26,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:43:26,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 34 [2022-11-18 18:43:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 18:43:26,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:27,775 INFO L321 Elim1Store]: treesize reduction 13, result has 89.5 percent of original size [2022-11-18 18:43:27,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 140 [2022-11-18 18:43:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 18:43:28,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287033855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:28,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:28,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 17] total 53 [2022-11-18 18:43:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997350431] [2022-11-18 18:43:28,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 18:43:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 18:43:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 18:43:28,568 INFO L87 Difference]: Start difference. First operand 3682 states and 4128 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:45,658 INFO L93 Difference]: Finished difference Result 5200 states and 5759 transitions. [2022-11-18 18:43:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-18 18:43:45,659 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-18 18:43:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:45,661 INFO L225 Difference]: With dead ends: 5200 [2022-11-18 18:43:45,661 INFO L226 Difference]: Without dead ends: 2830 [2022-11-18 18:43:45,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2022-11-18 18:43:45,663 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1275 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:45,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 933 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 18:43:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-11-18 18:43:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2389. [2022-11-18 18:43:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 1.0649078726968175) internal successors, (2543), 2388 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 2543 transitions. [2022-11-18 18:43:48,584 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 2543 transitions. Word has length 88 [2022-11-18 18:43:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:48,584 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 2543 transitions. [2022-11-18 18:43:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 2543 transitions. [2022-11-18 18:43:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 18:43:48,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:48,588 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:48,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:48,794 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2145546816, now seen corresponding path program 17 times [2022-11-18 18:43:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627166684] [2022-11-18 18:43:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 18:43:51,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627166684] [2022-11-18 18:43:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627166684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846107109] [2022-11-18 18:43:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:43:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:51,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:51,072 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:51,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 18:43:57,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 18:43:57,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:43:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 18:43:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:57,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-11-18 18:43:57,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-18 18:43:58,581 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 15 treesize of output 7 [2022-11-18 18:43:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 101 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 18:43:58,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 62 proven. 78 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 18:43:59,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846107109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:59,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:59,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 42 [2022-11-18 18:43:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266665348] [2022-11-18 18:43:59,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 18:43:59,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 18:43:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 18:43:59,767 INFO L87 Difference]: Start difference. First operand 2389 states and 2543 transitions. Second operand has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:04,449 INFO L93 Difference]: Finished difference Result 2597 states and 2778 transitions. [2022-11-18 18:44:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:44:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-18 18:44:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:04,452 INFO L225 Difference]: With dead ends: 2597 [2022-11-18 18:44:04,452 INFO L226 Difference]: Without dead ends: 1928 [2022-11-18 18:44:04,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=420, Invalid=2442, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 18:44:04,453 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 427 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:04,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 965 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:44:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2022-11-18 18:44:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1802. [2022-11-18 18:44:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 1.0699611327040532) internal successors, (1927), 1801 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 1927 transitions. [2022-11-18 18:44:06,669 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 1927 transitions. Word has length 98 [2022-11-18 18:44:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:06,669 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 1927 transitions. [2022-11-18 18:44:06,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 1927 transitions. [2022-11-18 18:44:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-18 18:44:06,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:06,672 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:06,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:06,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 18:44:06,873 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1561485459, now seen corresponding path program 18 times [2022-11-18 18:44:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:06,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328741848] [2022-11-18 18:44:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:06,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-18 18:44:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328741848] [2022-11-18 18:44:08,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328741848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:08,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330265966] [2022-11-18 18:44:08,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:44:08,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:08,523 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:08,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 18:44:09,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-18 18:44:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:09,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-18 18:44:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:09,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:44:09,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:44:09,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:44:09,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:44:09,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:44:09,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 18:44:15,852 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 18:44:15,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 20 [2022-11-18 18:44:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 18:44:15,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 185 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-18 18:44:26,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330265966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:26,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:26,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 43, 32] total 84 [2022-11-18 18:44:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970729394] [2022-11-18 18:44:26,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:26,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-18 18:44:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-18 18:44:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=5794, Unknown=0, NotChecked=0, Total=6972 [2022-11-18 18:44:26,753 INFO L87 Difference]: Start difference. First operand 1802 states and 1927 transitions. Second operand has 84 states, 84 states have (on average 2.630952380952381) internal successors, (221), 84 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:34,301 INFO L93 Difference]: Finished difference Result 2355 states and 2508 transitions. [2022-11-18 18:44:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 18:44:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.630952380952381) internal successors, (221), 84 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-18 18:44:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:34,304 INFO L225 Difference]: With dead ends: 2355 [2022-11-18 18:44:34,304 INFO L226 Difference]: Without dead ends: 2351 [2022-11-18 18:44:34,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4779 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2021, Invalid=10861, Unknown=0, NotChecked=0, Total=12882 [2022-11-18 18:44:34,305 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 774 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:34,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 873 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1189 Invalid, 0 Unknown, 836 Unchecked, 1.0s Time] [2022-11-18 18:44:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-11-18 18:44:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1841. [2022-11-18 18:44:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.0679347826086956) internal successors, (1965), 1840 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 1965 transitions. [2022-11-18 18:44:36,565 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 1965 transitions. Word has length 99 [2022-11-18 18:44:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:36,565 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 1965 transitions. [2022-11-18 18:44:36,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.630952380952381) internal successors, (221), 84 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 1965 transitions. [2022-11-18 18:44:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 18:44:36,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:36,570 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:36,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:36,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 18:44:36,777 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 250681277, now seen corresponding path program 19 times [2022-11-18 18:44:36,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:36,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025046129] [2022-11-18 18:44:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-18 18:44:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025046129] [2022-11-18 18:44:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025046129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:37,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666562091] [2022-11-18 18:44:37,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:44:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:37,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:37,591 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:37,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 18:44:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 18:44:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 18:44:38,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-18 18:44:38,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666562091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:38,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2022-11-18 18:44:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096135927] [2022-11-18 18:44:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 18:44:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 18:44:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-11-18 18:44:38,923 INFO L87 Difference]: Start difference. First operand 1841 states and 1965 transitions. Second operand has 32 states, 32 states have (on average 5.96875) internal successors, (191), 32 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:49,926 INFO L93 Difference]: Finished difference Result 3005 states and 3247 transitions. [2022-11-18 18:44:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-18 18:44:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.96875) internal successors, (191), 32 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-18 18:44:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:49,929 INFO L225 Difference]: With dead ends: 3005 [2022-11-18 18:44:49,929 INFO L226 Difference]: Without dead ends: 3001 [2022-11-18 18:44:49,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=616, Invalid=9686, Unknown=0, NotChecked=0, Total=10302 [2022-11-18 18:44:49,931 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 772 mSDsluCounter, 5017 mSDsCounter, 0 mSdLazyCounter, 4741 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 5303 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:49,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 5303 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4741 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 18:44:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2022-11-18 18:44:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1906. [2022-11-18 18:44:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 1.0650918635170603) internal successors, (2029), 1905 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2029 transitions. [2022-11-18 18:44:52,476 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2029 transitions. Word has length 109 [2022-11-18 18:44:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:52,476 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 2029 transitions. [2022-11-18 18:44:52,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.96875) internal successors, (191), 32 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2029 transitions. [2022-11-18 18:44:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 18:44:52,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:52,479 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:52,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 18:44:52,680 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:44:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 508846715, now seen corresponding path program 20 times [2022-11-18 18:44:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:52,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121832885] [2022-11-18 18:44:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 18:44:57,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121832885] [2022-11-18 18:44:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121832885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759530922] [2022-11-18 18:44:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:44:57,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:57,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:57,161 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:57,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 18:44:57,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:44:57,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:44:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:44:58,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:44:58,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:44:58,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:44:58,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 33 [2022-11-18 18:44:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 245 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:44:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:59,949 INFO L321 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2022-11-18 18:44:59,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-11-18 18:45:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 53 proven. 201 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-18 18:45:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759530922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:00,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:00,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 16] total 47 [2022-11-18 18:45:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785517530] [2022-11-18 18:45:00,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:00,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 18:45:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 18:45:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 18:45:00,608 INFO L87 Difference]: Start difference. First operand 1906 states and 2029 transitions. Second operand has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 47 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:09,571 INFO L93 Difference]: Finished difference Result 2878 states and 3087 transitions. [2022-11-18 18:45:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 18:45:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 47 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-18 18:45:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:09,574 INFO L225 Difference]: With dead ends: 2878 [2022-11-18 18:45:09,574 INFO L226 Difference]: Without dead ends: 2798 [2022-11-18 18:45:09,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 193 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=629, Invalid=4627, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 18:45:09,575 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 606 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:09,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1022 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:45:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-11-18 18:45:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2394. [2022-11-18 18:45:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 1.0513999164229002) internal successors, (2516), 2393 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 2516 transitions. [2022-11-18 18:45:13,663 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 2516 transitions. Word has length 109 [2022-11-18 18:45:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:13,663 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 2516 transitions. [2022-11-18 18:45:13,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 47 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 2516 transitions. [2022-11-18 18:45:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 18:45:13,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:13,666 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:13,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:13,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 18:45:13,867 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:45:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash -881515465, now seen corresponding path program 21 times [2022-11-18 18:45:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:13,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436358993] [2022-11-18 18:45:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 247 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 18:45:18,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:18,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436358993] [2022-11-18 18:45:18,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436358993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:18,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425092825] [2022-11-18 18:45:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:45:18,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:18,376 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:18,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 18:45:19,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 18:45:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-18 18:45:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:19,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:45:19,368 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 16 treesize of output 18 [2022-11-18 18:45:19,461 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 16 treesize of output 18 [2022-11-18 18:45:19,551 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 16 treesize of output 18 [2022-11-18 18:45:19,641 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 16 treesize of output 18 [2022-11-18 18:45:19,725 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 25 treesize of output 24 [2022-11-18 18:45:28,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:45:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:45:28,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:45:28,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 33 [2022-11-18 18:45:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 103 proven. 161 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 18:45:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 37 proven. 202 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 18:45:53,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425092825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:53,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:53,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 34, 27] total 83 [2022-11-18 18:45:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088724051] [2022-11-18 18:45:53,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:53,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 18:45:53,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 18:45:53,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=6016, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 18:45:53,270 INFO L87 Difference]: Start difference. First operand 2394 states and 2516 transitions. Second operand has 83 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 83 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:38,639 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:46:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:46:43,287 INFO L93 Difference]: Finished difference Result 2595 states and 2740 transitions. [2022-11-18 18:46:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 18:46:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 83 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-18 18:46:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:46:43,290 INFO L225 Difference]: With dead ends: 2595 [2022-11-18 18:46:43,290 INFO L226 Difference]: Without dead ends: 2333 [2022-11-18 18:46:43,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6613 ImplicationChecksByTransitivity, 63.8s TimeCoverageRelationStatistics Valid=2554, Invalid=18903, Unknown=5, NotChecked=0, Total=21462 [2022-11-18 18:46:43,292 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 560 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1400 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:46:43,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1170 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1632 Invalid, 0 Unknown, 1400 Unchecked, 1.8s Time] [2022-11-18 18:46:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-11-18 18:46:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2176. [2022-11-18 18:46:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.0510344827586207) internal successors, (2286), 2175 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2286 transitions. [2022-11-18 18:46:47,176 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2286 transitions. Word has length 109 [2022-11-18 18:46:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:46:47,176 INFO L495 AbstractCegarLoop]: Abstraction has 2176 states and 2286 transitions. [2022-11-18 18:46:47,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 83 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2286 transitions. [2022-11-18 18:46:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 18:46:47,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:46:47,181 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:47,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:47,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 18:46:47,389 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:46:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1126700283, now seen corresponding path program 22 times [2022-11-18 18:46:47,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:47,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023238906] [2022-11-18 18:46:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:47,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 18:46:51,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023238906] [2022-11-18 18:46:51,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023238906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993029275] [2022-11-18 18:46:51,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:46:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:51,659 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:51,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 18:46:51,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:46:51,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:46:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 18:46:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:53,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:46:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:46:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:46:53,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:46:53,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 34 [2022-11-18 18:46:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 222 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 18:46:53,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:54,871 INFO L321 Elim1Store]: treesize reduction 13, result has 89.3 percent of original size [2022-11-18 18:46:54,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 138 [2022-11-18 18:46:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 53 proven. 201 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-18 18:46:55,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993029275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:55,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:55,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 16] total 47 [2022-11-18 18:46:55,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286757993] [2022-11-18 18:46:55,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:55,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 18:46:55,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:55,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 18:46:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 18:46:55,644 INFO L87 Difference]: Start difference. First operand 2176 states and 2286 transitions. Second operand has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:06,796 INFO L93 Difference]: Finished difference Result 2552 states and 2706 transitions. [2022-11-18 18:47:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 18:47:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-18 18:47:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:06,799 INFO L225 Difference]: With dead ends: 2552 [2022-11-18 18:47:06,799 INFO L226 Difference]: Without dead ends: 2512 [2022-11-18 18:47:06,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=615, Invalid=4497, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 18:47:06,801 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 581 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:06,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1180 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 18:47:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2022-11-18 18:47:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2272. [2022-11-18 18:47:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 1.0475561426684281) internal successors, (2379), 2271 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2379 transitions. [2022-11-18 18:47:11,232 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2379 transitions. Word has length 109 [2022-11-18 18:47:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:11,232 INFO L495 AbstractCegarLoop]: Abstraction has 2272 states and 2379 transitions. [2022-11-18 18:47:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2379 transitions. [2022-11-18 18:47:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 18:47:11,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:11,235 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:11,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ce8682-5f10-4733-91d9-8d47c9f02d14/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 18:47:11,436 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:47:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 704807351, now seen corresponding path program 23 times [2022-11-18 18:47:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850431537] [2022-11-18 18:47:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat