./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condg.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condg.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS --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 2909e53e12aac54327f6ce090ad489c978c1fbcfb0ae8bd4172abe8a99b2cb53 --- 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-4e7fbc6 [2022-11-23 03:40:47,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:40:47,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:40:47,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:40:47,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:40:47,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:40:47,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:40:47,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:40:47,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:40:47,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:40:47,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:40:47,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:40:47,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:40:47,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:40:47,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:40:47,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:40:47,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:40:47,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:40:47,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:40:47,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:40:47,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:40:47,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:40:47,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:40:47,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:40:47,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:40:47,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:40:47,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:40:47,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:40:47,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:40:47,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:40:47,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:40:47,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:40:47,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:40:47,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:40:47,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:40:47,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:40:47,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:40:47,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:40:47,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:40:47,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:40:47,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:40:47,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:40:47,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:40:47,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:40:47,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:40:47,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:40:47,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:40:47,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:40:47,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:40:47,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:40:47,278 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:40:47,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:40:47,279 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:40:47,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:40:47,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:40:47,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:40:47,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:40:47,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:40:47,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:40:47,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:40:47,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:40:47,283 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:40:47,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:40:47,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:40:47,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:40:47,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:40:47,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:40:47,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:40:47,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:40:47,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:40:47,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:40:47,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:40:47,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:40:47,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:40:47,287 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:40:47,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:40:47,288 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2909e53e12aac54327f6ce090ad489c978c1fbcfb0ae8bd4172abe8a99b2cb53 [2022-11-23 03:40:47,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:40:47,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:40:47,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:40:47,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:40:47,735 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:40:47,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/array-fpi/condg.c [2022-11-23 03:40:50,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:40:51,266 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:40:51,267 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/sv-benchmarks/c/array-fpi/condg.c [2022-11-23 03:40:51,277 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/data/4a620c3ec/7b7ee273a2d24df08c9a3eb3c0106ec9/FLAG4afe8f53f [2022-11-23 03:40:51,300 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/data/4a620c3ec/7b7ee273a2d24df08c9a3eb3c0106ec9 [2022-11-23 03:40:51,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:40:51,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:40:51,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:40:51,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:40:51,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:40:51,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3e604f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51, skipping insertion in model container [2022-11-23 03:40:51,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:40:51,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:40:51,582 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/sv-benchmarks/c/array-fpi/condg.c[588,601] [2022-11-23 03:40:51,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:40:51,620 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:40:51,637 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/sv-benchmarks/c/array-fpi/condg.c[588,601] [2022-11-23 03:40:51,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:40:51,665 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:40:51,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51 WrapperNode [2022-11-23 03:40:51,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:40:51,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:40:51,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:40:51,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:40:51,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,712 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 97 [2022-11-23 03:40:51,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:40:51,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:40:51,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:40:51,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:40:51,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:40:51,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:40:51,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:40:51,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:40:51,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (1/1) ... [2022-11-23 03:40:51,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:40:51,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:40:51,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:40:51,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:40:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:40:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:40:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:40:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:40:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:40:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:40:51,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:40:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:40:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:40:51,966 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:40:51,968 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:40:52,233 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:40:52,240 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:40:52,240 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:40:52,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:52 BoogieIcfgContainer [2022-11-23 03:40:52,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:40:52,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:40:52,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:40:52,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:40:52,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:40:51" (1/3) ... [2022-11-23 03:40:52,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@677def39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:52, skipping insertion in model container [2022-11-23 03:40:52,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:51" (2/3) ... [2022-11-23 03:40:52,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@677def39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:52, skipping insertion in model container [2022-11-23 03:40:52,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:52" (3/3) ... [2022-11-23 03:40:52,257 INFO L112 eAbstractionObserver]: Analyzing ICFG condg.c [2022-11-23 03:40:52,307 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:40:52,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:40:52,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:40:52,417 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;@584725b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:40:52,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 03:40:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 03:40:52,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:40:52,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:40:52,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:40:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:40:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash -592817118, now seen corresponding path program 1 times [2022-11-23 03:40:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:40:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707220224] [2022-11-23 03:40:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:40:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:52,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:40:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707220224] [2022-11-23 03:40:52,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707220224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:40:52,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:40:52,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:40:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800612402] [2022-11-23 03:40:52,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:40:52,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:40:52,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:40:52,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:40:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:40:52,767 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:40:52,783 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2022-11-23 03:40:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:40:52,786 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 03:40:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:40:52,794 INFO L225 Difference]: With dead ends: 46 [2022-11-23 03:40:52,795 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 03:40:52,798 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 [2022-11-23 03:40:52,802 INFO L413 NwaCegarLoop]: 30 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, 30 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 [2022-11-23 03:40:52,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:40:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 03:40:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 03:40:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-23 03:40:52,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2022-11-23 03:40:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:40:52,852 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-23 03:40:52,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-23 03:40:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 03:40:52,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:40:52,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:40:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:40:52,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:40:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:40:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 108247460, now seen corresponding path program 1 times [2022-11-23 03:40:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:40:52,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691033349] [2022-11-23 03:40:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:40:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:40:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691033349] [2022-11-23 03:40:53,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691033349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:40:53,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:40:53,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:40:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557767764] [2022-11-23 03:40:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:40:53,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:40:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:40:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:40:53,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:40:53,032 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:40:53,116 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-23 03:40:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:40:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 03:40:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:40:53,118 INFO L225 Difference]: With dead ends: 48 [2022-11-23 03:40:53,118 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 03:40:53,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:40:53,120 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:40:53,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 16 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:40:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 03:40:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2022-11-23 03:40:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-23 03:40:53,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-11-23 03:40:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:40:53,129 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-23 03:40:53,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-23 03:40:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 03:40:53,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:40:53,131 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] [2022-11-23 03:40:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:40:53,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:40:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:40:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1242970242, now seen corresponding path program 1 times [2022-11-23 03:40:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:40:53,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715782401] [2022-11-23 03:40:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:40:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:54,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:40:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715782401] [2022-11-23 03:40:54,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715782401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:40:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363548482] [2022-11-23 03:40:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:54,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:40:54,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:40:54,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:40:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 03:40:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:40:54,592 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 [2022-11-23 03:40:54,651 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 18 treesize of output 14 [2022-11-23 03:40:54,735 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 14 treesize of output 16 [2022-11-23 03:40:54,844 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 20 [2022-11-23 03:40:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:40:55,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:40:55,145 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-23 03:40:55,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:40:55,157 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 32 [2022-11-23 03:40:55,182 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 5 treesize of output 3 [2022-11-23 03:40:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:55,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363548482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:40:55,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:40:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-11-23 03:40:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736278688] [2022-11-23 03:40:55,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:40:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:40:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:40:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:40:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=249, Unknown=2, NotChecked=0, Total=306 [2022-11-23 03:40:55,215 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2022-11-23 03:40:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:40:55,915 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2022-11-23 03:40:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:40:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) Word has length 21 [2022-11-23 03:40:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:40:55,917 INFO L225 Difference]: With dead ends: 56 [2022-11-23 03:40:55,918 INFO L226 Difference]: Without dead ends: 54 [2022-11-23 03:40:55,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=758, Unknown=2, NotChecked=0, Total=930 [2022-11-23 03:40:55,919 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:40:55,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 127 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:40:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-23 03:40:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-11-23 03:40:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-23 03:40:55,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2022-11-23 03:40:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:40:55,942 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-23 03:40:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2022-11-23 03:40:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-23 03:40:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 03:40:55,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:40:55,946 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] [2022-11-23 03:40:55,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:40:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:56,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:40:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:40:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 532037120, now seen corresponding path program 1 times [2022-11-23 03:40:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:40:56,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523263313] [2022-11-23 03:40:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:40:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:56,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:40:56,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523263313] [2022-11-23 03:40:56,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523263313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:40:56,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779351476] [2022-11-23 03:40:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:56,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:56,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:40:56,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:40:56,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:40:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 03:40:57,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:40:57,064 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 [2022-11-23 03:40:57,079 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 [2022-11-23 03:40:57,111 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 22 [2022-11-23 03:40:57,308 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 36 treesize of output 23 [2022-11-23 03:40:57,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-23 03:40:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:57,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:40:57,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:40:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:40:57,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779351476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:40:57,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:40:57,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-11-23 03:40:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103972368] [2022-11-23 03:40:57,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:40:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 03:40:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:40:57,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 03:40:57,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-23 03:40:57,697 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:40:58,214 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-11-23 03:40:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:40:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 03:40:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:40:58,220 INFO L225 Difference]: With dead ends: 83 [2022-11-23 03:40:58,220 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 03:40:58,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-11-23 03:40:58,227 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:40:58,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 102 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:40:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 03:40:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2022-11-23 03:40:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 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) [2022-11-23 03:40:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2022-11-23 03:40:58,244 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 21 [2022-11-23 03:40:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:40:58,245 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2022-11-23 03:40:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2022-11-23 03:40:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 03:40:58,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:40:58,247 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] [2022-11-23 03:40:58,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:40:58,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:58,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:40:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:40:58,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1912499326, now seen corresponding path program 2 times [2022-11-23 03:40:58,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:40:58,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548083943] [2022-11-23 03:40:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:58,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:40:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:40:58,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:40:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548083943] [2022-11-23 03:40:58,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548083943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:40:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162876163] [2022-11-23 03:40:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:40:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:40:58,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:40:58,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:40:58,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:40:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:40:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:40:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:40:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:40:58,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:40:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:40:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162876163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:40:58,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:40:58,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-23 03:40:58,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464222164] [2022-11-23 03:40:58,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:40:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:40:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:40:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:40:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:40:58,868 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:40:59,211 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2022-11-23 03:40:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:40:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-23 03:40:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:40:59,212 INFO L225 Difference]: With dead ends: 99 [2022-11-23 03:40:59,212 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 03:40:59,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-23 03:40:59,214 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 175 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:40:59,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 87 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:40:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 03:40:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2022-11-23 03:40:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-23 03:40:59,225 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 23 [2022-11-23 03:40:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:40:59,225 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-23 03:40:59,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:40:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-23 03:40:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 03:40:59,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:40:59,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:40:59,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:40:59,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:59,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:40:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:40:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash 550852762, now seen corresponding path program 1 times [2022-11-23 03:40:59,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:40:59,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993400318] [2022-11-23 03:40:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:59,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:40:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 03:40:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:40:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993400318] [2022-11-23 03:40:59,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993400318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:40:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064610762] [2022-11-23 03:40:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:40:59,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:40:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:40:59,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:40:59,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:40:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:40:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:40:59,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:40:59,713 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 [2022-11-23 03:40:59,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:40:59,784 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 15 treesize of output 17 [2022-11-23 03:40:59,798 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 [2022-11-23 03:40:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:40:59,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 03:41:01,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064610762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:01,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:01,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 8 [2022-11-23 03:41:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756327190] [2022-11-23 03:41:01,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:41:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:41:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-11-23 03:41:01,896 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:41:02,085 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-11-23 03:41:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:41:02,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 03:41:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:41:02,087 INFO L225 Difference]: With dead ends: 76 [2022-11-23 03:41:02,087 INFO L226 Difference]: Without dead ends: 66 [2022-11-23 03:41:02,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=41, Invalid=90, Unknown=1, NotChecked=0, Total=132 [2022-11-23 03:41:02,088 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:41:02,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:41:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-23 03:41:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2022-11-23 03:41:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-11-23 03:41:02,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 28 [2022-11-23 03:41:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:41:02,103 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-11-23 03:41:02,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-11-23 03:41:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 03:41:02,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:41:02,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:41:02,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:41:02,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 03:41:02,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:41:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:41:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1969107172, now seen corresponding path program 3 times [2022-11-23 03:41:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:41:02,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013615735] [2022-11-23 03:41:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:02,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:41:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:41:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:41:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013615735] [2022-11-23 03:41:04,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013615735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:41:04,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869439282] [2022-11-23 03:41:04,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:41:04,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:41:04,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:41:04,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:41:04,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:41:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:41:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 03:41:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:41:04,423 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 [2022-11-23 03:41:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:04,480 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 22 [2022-11-23 03:41:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:04,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 03:41:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:04,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:04,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:04,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-11-23 03:41:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:04,965 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-23 03:41:04,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2022-11-23 03:41:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:05,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:41:05,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 35 [2022-11-23 03:41:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:41:05,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:41:08,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869439282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:08,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:08,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-11-23 03:41:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841124385] [2022-11-23 03:41:08,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:08,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 03:41:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 03:41:08,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 03:41:08,048 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 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) [2022-11-23 03:41:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:41:10,705 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-11-23 03:41:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 03:41:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 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) Word has length 28 [2022-11-23 03:41:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:41:10,706 INFO L225 Difference]: With dead ends: 126 [2022-11-23 03:41:10,706 INFO L226 Difference]: Without dead ends: 91 [2022-11-23 03:41:10,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=417, Invalid=2889, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 03:41:10,709 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:41:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 226 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 03:41:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-23 03:41:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2022-11-23 03:41:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 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) [2022-11-23 03:41:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-11-23 03:41:10,729 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 28 [2022-11-23 03:41:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:41:10,729 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-11-23 03:41:10,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 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) [2022-11-23 03:41:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-11-23 03:41:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 03:41:10,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:41:10,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:41:10,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:41:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:41:10,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:41:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:41:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash -736332014, now seen corresponding path program 1 times [2022-11-23 03:41:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:41:10,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802963153] [2022-11-23 03:41:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:41:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:41:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:41:12,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802963153] [2022-11-23 03:41:12,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802963153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:41:12,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192857098] [2022-11-23 03:41:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:12,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:41:12,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:41:12,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:41:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 03:41:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:41:12,486 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 [2022-11-23 03:41:12,543 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 [2022-11-23 03:41:12,635 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 14 treesize of output 16 [2022-11-23 03:41:12,659 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 14 treesize of output 16 [2022-11-23 03:41:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:12,759 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 22 [2022-11-23 03:41:12,809 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 49 treesize of output 21 [2022-11-23 03:41:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:41:12,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:13,229 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_244) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 1)) is different from false [2022-11-23 03:41:13,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:41:13,256 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-23 03:41:13,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:41:13,266 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 38 treesize of output 34 [2022-11-23 03:41:13,280 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 7 treesize of output 3 [2022-11-23 03:41:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-23 03:41:13,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192857098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:13,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:13,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 30 [2022-11-23 03:41:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750132152] [2022-11-23 03:41:13,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:13,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 03:41:13,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 03:41:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=700, Unknown=1, NotChecked=54, Total=870 [2022-11-23 03:41:13,358 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 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) [2022-11-23 03:41:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:41:15,248 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2022-11-23 03:41:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 03:41:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 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 32 [2022-11-23 03:41:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:41:15,249 INFO L225 Difference]: With dead ends: 138 [2022-11-23 03:41:15,249 INFO L226 Difference]: Without dead ends: 127 [2022-11-23 03:41:15,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=297, Invalid=1962, Unknown=1, NotChecked=92, Total=2352 [2022-11-23 03:41:15,251 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 80 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:41:15,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 218 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 576 Invalid, 5 Unknown, 60 Unchecked, 0.9s Time] [2022-11-23 03:41:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-23 03:41:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2022-11-23 03:41:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.211111111111111) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-23 03:41:15,276 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 32 [2022-11-23 03:41:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:41:15,277 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-23 03:41:15,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 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) [2022-11-23 03:41:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-23 03:41:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 03:41:15,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:41:15,279 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 03:41:15,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:41:15,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:15,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:41:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:41:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -35267436, now seen corresponding path program 1 times [2022-11-23 03:41:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:41:15,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086878701] [2022-11-23 03:41:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:15,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:41:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:41:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:41:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086878701] [2022-11-23 03:41:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086878701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:41:15,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504226046] [2022-11-23 03:41:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:15,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:15,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:41:15,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:41:15,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:41:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:41:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:41:15,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:41:15,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:41:15,790 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 14 treesize of output 16 [2022-11-23 03:41:15,800 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 [2022-11-23 03:41:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:41:15,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:17,904 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2022-11-23 03:41:17,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:41:17,924 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-23 03:41:17,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-23 03:41:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2022-11-23 03:41:17,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504226046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:17,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:17,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 9 [2022-11-23 03:41:17,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091168822] [2022-11-23 03:41:17,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:41:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:41:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=39, Unknown=2, NotChecked=12, Total=72 [2022-11-23 03:41:17,954 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:41:18,146 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2022-11-23 03:41:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:41:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 03:41:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:41:18,147 INFO L225 Difference]: With dead ends: 127 [2022-11-23 03:41:18,148 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 03:41:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=43, Invalid=91, Unknown=2, NotChecked=20, Total=156 [2022-11-23 03:41:18,149 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:41:18,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 56 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-23 03:41:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 03:41:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-11-23 03:41:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-23 03:41:18,165 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 32 [2022-11-23 03:41:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:41:18,166 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-23 03:41:18,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-23 03:41:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 03:41:18,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:41:18,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:41:18,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:41:18,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:18,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:41:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:41:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -767176616, now seen corresponding path program 4 times [2022-11-23 03:41:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:41:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344768053] [2022-11-23 03:41:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:41:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:41:18,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:41:18,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344768053] [2022-11-23 03:41:18,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344768053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:41:18,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534950360] [2022-11-23 03:41:18,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:41:18,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:18,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:41:18,555 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:41:18,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:41:18,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:41:18,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:41:18,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:41:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:41:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:41:18,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:41:18,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534950360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:18,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:18,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-23 03:41:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250531060] [2022-11-23 03:41:18,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:18,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:41:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:41:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:41:18,874 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2022-11-23 03:41:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:41:19,171 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2022-11-23 03:41:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:41:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) Word has length 32 [2022-11-23 03:41:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:41:19,173 INFO L225 Difference]: With dead ends: 114 [2022-11-23 03:41:19,173 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 03:41:19,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:41:19,174 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 141 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:41:19,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 69 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:41:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 03:41:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2022-11-23 03:41:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-23 03:41:19,187 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 32 [2022-11-23 03:41:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:41:19,187 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-23 03:41:19,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 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) [2022-11-23 03:41:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-23 03:41:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 03:41:19,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:41:19,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:41:19,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:41:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:41:19,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:41:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:41:19,395 INFO L85 PathProgramCache]: Analyzing trace with hash -143226682, now seen corresponding path program 2 times [2022-11-23 03:41:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:41:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957890079] [2022-11-23 03:41:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:41:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:41:20,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:41:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957890079] [2022-11-23 03:41:20,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957890079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:41:20,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535297696] [2022-11-23 03:41:20,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:41:20,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:41:20,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:41:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:41:20,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:41:20,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:41:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-23 03:41:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:41:20,977 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 [2022-11-23 03:41:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,046 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 22 [2022-11-23 03:41:21,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,203 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 30 treesize of output 32 [2022-11-23 03:41:21,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2022-11-23 03:41:21,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-23 03:41:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:21,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2022-11-23 03:41:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-11-23 03:41:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 58 [2022-11-23 03:41:22,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:22,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2022-11-23 03:41:22,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:22,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-23 03:41:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:41:23,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:41:26,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535297696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:26,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:26,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 26, 23] total 58 [2022-11-23 03:41:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438646716] [2022-11-23 03:41:26,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-23 03:41:26,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-23 03:41:26,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 03:41:26,158 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 58 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 58 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:41:48,689 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2022-11-23 03:41:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-23 03:41:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 58 states have internal predecessors, (92), 0 states have call successors, (0), 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 35 [2022-11-23 03:41:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:41:48,691 INFO L225 Difference]: With dead ends: 203 [2022-11-23 03:41:48,691 INFO L226 Difference]: Without dead ends: 201 [2022-11-23 03:41:48,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5661 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=2219, Invalid=15072, Unknown=1, NotChecked=0, Total=17292 [2022-11-23 03:41:48,698 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 652 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:41:48,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 264 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 03:41:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-23 03:41:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 63. [2022-11-23 03:41:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-11-23 03:41:48,719 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 35 [2022-11-23 03:41:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:41:48,719 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-11-23 03:41:48,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 58 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:41:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-11-23 03:41:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 03:41:48,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:41:48,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:41:48,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:41:48,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:48,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:41:48,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:41:48,927 INFO L85 PathProgramCache]: Analyzing trace with hash 651947656, now seen corresponding path program 5 times [2022-11-23 03:41:48,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:41:48,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586780802] [2022-11-23 03:41:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:41:48,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:41:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:41:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:41:51,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:41:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586780802] [2022-11-23 03:41:51,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586780802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:41:51,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528100769] [2022-11-23 03:41:51,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:41:51,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:41:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:41:51,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:41:51,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:41:51,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-23 03:41:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:41:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-23 03:41:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:41:51,479 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 [2022-11-23 03:41:51,485 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 [2022-11-23 03:41:51,500 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 22 [2022-11-23 03:41:51,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:51,551 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 30 treesize of output 32 [2022-11-23 03:41:51,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:51,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:51,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-11-23 03:41:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:51,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-11-23 03:41:52,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:52,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:52,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:41:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:41:52,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 55 [2022-11-23 03:41:52,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 49 [2022-11-23 03:41:52,618 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 41 treesize of output 35 [2022-11-23 03:41:52,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-23 03:41:52,702 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 [2022-11-23 03:41:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:41:52,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:41:52,884 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_472 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_472) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2022-11-23 03:41:53,127 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_472 (Array Int Int))) (= c_~N~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset| (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ .cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2)))))) |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_472) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) is different from false [2022-11-23 03:41:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 9 not checked. [2022-11-23 03:41:55,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528100769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:41:55,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:41:55,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 46 [2022-11-23 03:41:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45583855] [2022-11-23 03:41:55,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:41:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 03:41:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:41:55,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 03:41:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1636, Unknown=11, NotChecked=170, Total=2070 [2022-11-23 03:41:55,769 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 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) [2022-11-23 03:42:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:42:05,980 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-11-23 03:42:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 03:42:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 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) Word has length 35 [2022-11-23 03:42:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:42:05,983 INFO L225 Difference]: With dead ends: 161 [2022-11-23 03:42:05,983 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 03:42:05,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=582, Invalid=3968, Unknown=14, NotChecked=266, Total=4830 [2022-11-23 03:42:05,987 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 120 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:42:05,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 294 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 677 Invalid, 33 Unknown, 114 Unchecked, 3.0s Time] [2022-11-23 03:42:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 03:42:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 82. [2022-11-23 03:42:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-11-23 03:42:06,020 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 35 [2022-11-23 03:42:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:42:06,020 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-11-23 03:42:06,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 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) [2022-11-23 03:42:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-11-23 03:42:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 03:42:06,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:42:06,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:42:06,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:42:06,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 03:42:06,223 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:42:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:42:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1015472054, now seen corresponding path program 6 times [2022-11-23 03:42:06,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:42:06,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843004937] [2022-11-23 03:42:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:42:06,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:42:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:42:06,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:42:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843004937] [2022-11-23 03:42:06,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843004937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:42:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638409706] [2022-11-23 03:42:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:42:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:06,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:42:06,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:42:06,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:42:06,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-23 03:42:06,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:42:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:42:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:42:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:42:06,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:42:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 03:42:06,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638409706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:42:06,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:42:06,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-23 03:42:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135833200] [2022-11-23 03:42:06,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:42:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 03:42:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:42:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 03:42:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-23 03:42:06,805 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:42:07,430 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2022-11-23 03:42:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 03:42:07,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 03:42:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:42:07,432 INFO L225 Difference]: With dead ends: 188 [2022-11-23 03:42:07,433 INFO L226 Difference]: Without dead ends: 145 [2022-11-23 03:42:07,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-23 03:42:07,445 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:42:07,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 155 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:42:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-23 03:42:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2022-11-23 03:42:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 97 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2022-11-23 03:42:07,494 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 37 [2022-11-23 03:42:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:42:07,494 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2022-11-23 03:42:07,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2022-11-23 03:42:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 03:42:07,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:42:07,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:42:07,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:42:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:42:07,705 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:42:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:42:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1487374188, now seen corresponding path program 7 times [2022-11-23 03:42:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:42:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277847493] [2022-11-23 03:42:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:42:07,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:42:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 03:42:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:42:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277847493] [2022-11-23 03:42:10,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277847493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:42:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891203943] [2022-11-23 03:42:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:42:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:42:10,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:42:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:42:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-23 03:42:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:42:10,628 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 [2022-11-23 03:42:10,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:42:10,647 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 22 [2022-11-23 03:42:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:10,683 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 30 treesize of output 32 [2022-11-23 03:42:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:10,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 03:42:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:10,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-23 03:42:11,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:11,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-23 03:42:11,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:11,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-23 03:42:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-23 03:42:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:11,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:11,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 61 [2022-11-23 03:42:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 03:42:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:42:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 03:42:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891203943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:42:16,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:42:16,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 51 [2022-11-23 03:42:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851297817] [2022-11-23 03:42:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:42:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 03:42:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:42:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 03:42:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2343, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 03:42:16,411 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:42:21,190 INFO L93 Difference]: Finished difference Result 179 states and 199 transitions. [2022-11-23 03:42:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 03:42:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-23 03:42:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:42:21,192 INFO L225 Difference]: With dead ends: 179 [2022-11-23 03:42:21,193 INFO L226 Difference]: Without dead ends: 161 [2022-11-23 03:42:21,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=306, Invalid=3476, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 03:42:21,195 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:42:21,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 301 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 03:42:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-23 03:42:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 108. [2022-11-23 03:42:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 107 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2022-11-23 03:42:21,243 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 42 [2022-11-23 03:42:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:42:21,245 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2022-11-23 03:42:21,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2022-11-23 03:42:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 03:42:21,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:42:21,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:42:21,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:42:21,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:42:21,452 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:42:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:42:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2085827890, now seen corresponding path program 2 times [2022-11-23 03:42:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:42:21,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552555043] [2022-11-23 03:42:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:42:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:42:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:42:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:42:22,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552555043] [2022-11-23 03:42:22,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552555043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:42:22,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518736987] [2022-11-23 03:42:22,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:42:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:42:22,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:42:22,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:42:22,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:42:22,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:42:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 03:42:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:42:23,086 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 [2022-11-23 03:42:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:23,145 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 [2022-11-23 03:42:23,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:23,163 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 [2022-11-23 03:42:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:23,206 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 [2022-11-23 03:42:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:23,298 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 [2022-11-23 03:42:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:23,351 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 [2022-11-23 03:42:23,398 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 49 treesize of output 21 [2022-11-23 03:42:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:42:23,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:42:24,087 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_669 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_669) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1)) is different from false [2022-11-23 03:42:24,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:42:24,122 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-23 03:42:24,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:42:24,131 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 38 treesize of output 34 [2022-11-23 03:42:24,136 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 7 treesize of output 3 [2022-11-23 03:42:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 10 not checked. [2022-11-23 03:42:24,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518736987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:42:24,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:42:24,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-11-23 03:42:24,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970867790] [2022-11-23 03:42:24,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:42:24,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 03:42:24,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:42:24,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 03:42:24,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1194, Unknown=1, NotChecked=70, Total=1406 [2022-11-23 03:42:24,279 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:42:26,978 INFO L93 Difference]: Finished difference Result 163 states and 180 transitions. [2022-11-23 03:42:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 03:42:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 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 43 [2022-11-23 03:42:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:42:26,980 INFO L225 Difference]: With dead ends: 163 [2022-11-23 03:42:26,980 INFO L226 Difference]: Without dead ends: 161 [2022-11-23 03:42:26,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=493, Invalid=3670, Unknown=1, NotChecked=126, Total=4290 [2022-11-23 03:42:26,982 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 323 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:42:26,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 257 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 729 Invalid, 0 Unknown, 66 Unchecked, 1.0s Time] [2022-11-23 03:42:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-23 03:42:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2022-11-23 03:42:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2022-11-23 03:42:27,044 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 43 [2022-11-23 03:42:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:42:27,045 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2022-11-23 03:42:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2022-11-23 03:42:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 03:42:27,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:42:27,046 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:42:27,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:42:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:42:27,253 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:42:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:42:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -994502120, now seen corresponding path program 3 times [2022-11-23 03:42:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:42:27,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591656373] [2022-11-23 03:42:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:42:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:42:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:42:27,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:42:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591656373] [2022-11-23 03:42:27,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591656373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:42:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018177785] [2022-11-23 03:42:27,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:42:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:42:27,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:42:27,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:42:27,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 03:42:27,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:42:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:42:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:42:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:42:27,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:42:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 03:42:28,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018177785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:42:28,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:42:28,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-23 03:42:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535573538] [2022-11-23 03:42:28,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:42:28,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 03:42:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:42:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 03:42:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-11-23 03:42:28,119 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:42:28,880 INFO L93 Difference]: Finished difference Result 397 states and 440 transitions. [2022-11-23 03:42:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 03:42:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-23 03:42:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:42:28,882 INFO L225 Difference]: With dead ends: 397 [2022-11-23 03:42:28,882 INFO L226 Difference]: Without dead ends: 285 [2022-11-23 03:42:28,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=1254, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 03:42:28,883 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 654 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:42:28,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 141 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:42:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-23 03:42:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 213. [2022-11-23 03:42:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1273584905660377) internal successors, (239), 212 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2022-11-23 03:42:28,957 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 44 [2022-11-23 03:42:28,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:42:28,957 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2022-11-23 03:42:28,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2022-11-23 03:42:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 03:42:28,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:42:28,959 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:42:28,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:42:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:29,160 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:42:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:42:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -497669998, now seen corresponding path program 8 times [2022-11-23 03:42:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:42:29,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597327098] [2022-11-23 03:42:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:42:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:42:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 03:42:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:42:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597327098] [2022-11-23 03:42:29,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597327098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:42:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937622703] [2022-11-23 03:42:29,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:42:29,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:29,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:42:29,365 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:42:29,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:42:29,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:42:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:42:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:42:29,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:42:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 03:42:29,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:42:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 03:42:29,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937622703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:42:29,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:42:29,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-23 03:42:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549833641] [2022-11-23 03:42:29,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:42:29,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 03:42:29,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:42:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 03:42:29,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:42:29,744 INFO L87 Difference]: Start difference. First operand 213 states and 239 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:42:30,350 INFO L93 Difference]: Finished difference Result 287 states and 314 transitions. [2022-11-23 03:42:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:42:30,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-23 03:42:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:42:30,353 INFO L225 Difference]: With dead ends: 287 [2022-11-23 03:42:30,354 INFO L226 Difference]: Without dead ends: 234 [2022-11-23 03:42:30,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-11-23 03:42:30,355 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 226 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:42:30,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 216 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:42:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-23 03:42:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 198. [2022-11-23 03:42:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.101522842639594) internal successors, (217), 197 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 217 transitions. [2022-11-23 03:42:30,432 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 217 transitions. Word has length 44 [2022-11-23 03:42:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:42:30,432 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 217 transitions. [2022-11-23 03:42:30,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:42:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 217 transitions. [2022-11-23 03:42:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 03:42:30,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:42:30,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:42:30,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:42:30,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:30,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:42:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:42:30,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1027028208, now seen corresponding path program 9 times [2022-11-23 03:42:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:42:30,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540280960] [2022-11-23 03:42:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:42:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:42:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:42:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 03:42:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:42:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540280960] [2022-11-23 03:42:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540280960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:42:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072821355] [2022-11-23 03:42:34,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:42:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:42:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:42:34,155 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:42:34,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c901f6a5-3ba8-42b8-b2bb-de253b03d442/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:42:34,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 03:42:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:42:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-23 03:42:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:42:34,417 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 [2022-11-23 03:42:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,486 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 22 [2022-11-23 03:42:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,639 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 35 treesize of output 37 [2022-11-23 03:42:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 03:42:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:34,937 INFO L321 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2022-11-23 03:42:34,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2022-11-23 03:42:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:35,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:35,187 INFO L321 Elim1Store]: treesize reduction 94, result has 21.7 percent of original size [2022-11-23 03:42:35,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 71 [2022-11-23 03:42:35,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:35,855 INFO L321 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-11-23 03:42:35,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 81 treesize of output 80 [2022-11-23 03:42:36,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:36,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,219 INFO L321 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-11-23 03:42:36,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 83 [2022-11-23 03:42:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,615 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-11-23 03:42:36,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 78 [2022-11-23 03:42:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:36,870 INFO L321 Elim1Store]: treesize reduction 106, result has 0.9 percent of original size [2022-11-23 03:42:36,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 90 [2022-11-23 03:42:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:37,292 INFO L321 Elim1Store]: treesize reduction 148, result has 0.7 percent of original size [2022-11-23 03:42:37,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 87 treesize of output 92 [2022-11-23 03:42:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:38,253 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 77 treesize of output 63 [2022-11-23 03:42:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:42:38,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:42:38,277 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-11-23 03:42:38,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 27 [2022-11-23 03:42:38,488 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 [2022-11-23 03:42:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:42:39,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:45:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:45:16,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072821355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:45:16,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:45:16,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 34, 34] total 90 [2022-11-23 03:45:16,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106789615] [2022-11-23 03:45:16,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:45:16,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-23 03:45:16,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:45:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-23 03:45:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=7134, Unknown=20, NotChecked=0, Total=8010 [2022-11-23 03:45:16,932 INFO L87 Difference]: Start difference. First operand 198 states and 217 transitions. Second operand has 90 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 90 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:46:14,956 WARN L233 SmtUtils]: Spent 56.62s on a formula simplification. DAG size of input: 204 DAG size of output: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:46:53,985 WARN L233 SmtUtils]: Spent 33.68s on a formula simplification. DAG size of input: 172 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:47:38,905 WARN L233 SmtUtils]: Spent 39.64s on a formula simplification. DAG size of input: 180 DAG size of output: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:47:41,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:48:20,750 WARN L233 SmtUtils]: Spent 36.83s on a formula simplification. DAG size of input: 139 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:48:23,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:48:26,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:48:33,989 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 208 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:49:00,127 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 206 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:49:18,851 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:50:05,447 WARN L233 SmtUtils]: Spent 42.97s on a formula simplification. DAG size of input: 294 DAG size of output: 260 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:51:03,193 WARN L233 SmtUtils]: Spent 50.93s on a formula simplification. DAG size of input: 297 DAG size of output: 263 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:51:36,649 WARN L233 SmtUtils]: Spent 24.49s on a formula simplification. DAG size of input: 148 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:51:44,690 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 170 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:51:46,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:52:38,776 WARN L233 SmtUtils]: Spent 45.43s on a formula simplification. DAG size of input: 126 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:54:16,992 WARN L233 SmtUtils]: Spent 34.59s on a formula simplification. DAG size of input: 255 DAG size of output: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:54:20,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:54:22,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:54:25,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:54:27,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:54:28,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:54:29,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:54:30,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:55:29,441 WARN L233 SmtUtils]: Spent 37.40s on a formula simplification. DAG size of input: 207 DAG size of output: 169 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)