./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ss4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0 --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 cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:59:19,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:59:19,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:59:19,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:59:19,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:59:19,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:59:19,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:59:19,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:59:19,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:59:19,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:59:19,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:59:19,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:59:19,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:59:19,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:59:19,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:59:19,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:59:19,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:59:19,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:59:19,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:59:19,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:59:19,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:59:19,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:59:19,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:59:19,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:59:19,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:59:19,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:59:19,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:59:19,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:59:19,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:59:19,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:59:19,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:59:19,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:59:19,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:59:19,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:59:19,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:59:19,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:59:19,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:59:19,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:59:19,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:59:19,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:59:19,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:59:19,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:59:19,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:59:19,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:59:19,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:59:19,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:59:19,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:59:19,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:59:19,248 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:59:19,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:59:19,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:59:19,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:59:19,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:59:19,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:59:19,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:59:19,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:59:19,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:59:19,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:59:19,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:59:19,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:59:19,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:59:19,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:59:19,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:59:19,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:59:19,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:59:19,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:59:19,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:59:19,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:59:19,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:59:19,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:59:19,255 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:59:19,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:59:19,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:59:19,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:59:19,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2021-11-22 14:59:19,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:59:19,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:59:19,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:59:19,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:59:19,551 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:59:19,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-fpi/ss4.c [2021-11-22 14:59:19,629 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/data/a0e2b3adb/1b324a5761d449aeb6bfe409be8078b0/FLAGaffacb217 [2021-11-22 14:59:20,200 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:59:20,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/sv-benchmarks/c/array-fpi/ss4.c [2021-11-22 14:59:20,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/data/a0e2b3adb/1b324a5761d449aeb6bfe409be8078b0/FLAGaffacb217 [2021-11-22 14:59:20,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/data/a0e2b3adb/1b324a5761d449aeb6bfe409be8078b0 [2021-11-22 14:59:20,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:59:20,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:59:20,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:59:20,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:59:20,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:59:20,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d33a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20, skipping insertion in model container [2021-11-22 14:59:20,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:59:20,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:59:20,782 WARN L230 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_c478e2ed-9a6a-416d-bee6-2d7dffc23303/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2021-11-22 14:59:20,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:59:20,815 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:59:20,829 WARN L230 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_c478e2ed-9a6a-416d-bee6-2d7dffc23303/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2021-11-22 14:59:20,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:59:20,852 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:59:20,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20 WrapperNode [2021-11-22 14:59:20,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:59:20,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:59:20,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:59:20,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:59:20,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,904 INFO L137 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2021-11-22 14:59:20,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:59:20,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:59:20,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:59:20,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:59:20,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:59:20,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:59:20,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:59:20,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:59:20,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (1/1) ... [2021-11-22 14:59:20,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:59:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:20,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:59:20,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:59:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:59:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:59:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:59:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:59:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 14:59:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:59:21,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:59:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:59:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:59:21,096 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:59:21,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:59:21,247 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:59:21,253 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:59:21,253 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 14:59:21,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:59:21 BoogieIcfgContainer [2021-11-22 14:59:21,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:59:21,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:59:21,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:59:21,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:59:21,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:59:20" (1/3) ... [2021-11-22 14:59:21,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c450921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:59:21, skipping insertion in model container [2021-11-22 14:59:21,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:59:20" (2/3) ... [2021-11-22 14:59:21,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c450921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:59:21, skipping insertion in model container [2021-11-22 14:59:21,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:59:21" (3/3) ... [2021-11-22 14:59:21,280 INFO L111 eAbstractionObserver]: Analyzing ICFG ss4.c [2021-11-22 14:59:21,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:59:21,285 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:59:21,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:59:21,377 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:59:21,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:59:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:59:21,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:21,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:21,403 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2021-11-22 14:59:21,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:21,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412289638] [2021-11-22 14:59:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:21,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:21,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412289638] [2021-11-22 14:59:21,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412289638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:59:21,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:59:21,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:59:21,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615567567] [2021-11-22 14:59:21,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:59:21,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:59:21,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:59:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:59:21,713 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:21,735 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-11-22 14:59:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:59:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 14:59:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:21,754 INFO L225 Difference]: With dead ends: 44 [2021-11-22 14:59:21,755 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 14:59:21,758 INFO L932 BasicCegarLoop]: 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 [2021-11-22 14:59:21,763 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:21,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:59:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 14:59:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-22 14:59:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-22 14:59:21,805 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-11-22 14:59:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:21,806 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-22 14:59:21,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-22 14:59:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:59:21,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:21,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:21,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:59:21,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2021-11-22 14:59:21,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534199830] [2021-11-22 14:59:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:21,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:21,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:21,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534199830] [2021-11-22 14:59:21,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534199830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:59:21,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:59:21,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:59:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551764375] [2021-11-22 14:59:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:59:21,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:59:21,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:59:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:59:21,985 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:22,078 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-11-22 14:59:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:59:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 14:59:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:22,082 INFO L225 Difference]: With dead ends: 41 [2021-11-22 14:59:22,082 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 14:59:22,086 INFO L932 BasicCegarLoop]: 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 [2021-11-22 14:59:22,089 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:22,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:59:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 14:59:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-22 14:59:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-22 14:59:22,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-11-22 14:59:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:22,102 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-22 14:59:22,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-22 14:59:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:59:22,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:22,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:59:22,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2021-11-22 14:59:22,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:22,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507385900] [2021-11-22 14:59:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:22,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:22,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:59:22,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506779386] [2021-11-22 14:59:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:22,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:22,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:22,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:59:22,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:59:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 14:59:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:59:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:22,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:22,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:22,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 23 [2021-11-22 14:59:22,919 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-22 14:59:22,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-22 14:59:23,080 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-22 14:59:23,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 44 [2021-11-22 14:59:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:23,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:59:23,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 114 [2021-11-22 14:59:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:23,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507385900] [2021-11-22 14:59:23,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:59:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506779386] [2021-11-22 14:59:23,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506779386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:59:23,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:59:23,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-22 14:59:23,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223085176] [2021-11-22 14:59:23,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:59:23,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:59:23,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:59:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:59:23,941 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:24,907 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-22 14:59:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 14:59:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 14:59:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:24,912 INFO L225 Difference]: With dead ends: 44 [2021-11-22 14:59:24,912 INFO L226 Difference]: Without dead ends: 40 [2021-11-22 14:59:24,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:59:24,918 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:24,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 70 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time] [2021-11-22 14:59:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-22 14:59:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-11-22 14:59:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2021-11-22 14:59:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-22 14:59:24,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 23 [2021-11-22 14:59:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:24,940 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-22 14:59:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-22 14:59:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:59:24,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:24,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:24,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:59:25,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:25,149 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2021-11-22 14:59:25,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:25,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852022939] [2021-11-22 14:59:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:25,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:25,172 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:59:25,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15241531] [2021-11-22 14:59:25,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:59:25,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:25,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:25,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:59:25,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:59:25,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:59:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:59:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:59:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:59:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:59:25,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:59:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:59:25,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852022939] [2021-11-22 14:59:25,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:59:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15241531] [2021-11-22 14:59:25,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15241531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:59:25,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:59:25,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-22 14:59:25,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776858535] [2021-11-22 14:59:25,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:59:25,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:59:25,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:59:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:59:25,398 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 14:59:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:25,550 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-11-22 14:59:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:59:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 25 [2021-11-22 14:59:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:25,552 INFO L225 Difference]: With dead ends: 79 [2021-11-22 14:59:25,553 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 14:59:25,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:59:25,556 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:25,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:59:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 14:59:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-11-22 14:59:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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) [2021-11-22 14:59:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-22 14:59:25,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2021-11-22 14:59:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-22 14:59:25,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 14:59:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-22 14:59:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:59:25,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:25,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:59:25,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:59:25,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:25,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:25,802 INFO L85 PathProgramCache]: Analyzing trace with hash 119582130, now seen corresponding path program 3 times [2021-11-22 14:59:25,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:25,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987969948] [2021-11-22 14:59:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:25,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:25,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:59:25,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69701004] [2021-11-22 14:59:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:59:25,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:25,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:59:25,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:59:25,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:59:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:59:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:59:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:59:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:59:25,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:59:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:59:26,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987969948] [2021-11-22 14:59:26,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:59:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69701004] [2021-11-22 14:59:26,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69701004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:59:26,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:59:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-22 14:59:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749669439] [2021-11-22 14:59:26,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:59:26,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:59:26,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:59:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:59:26,076 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 14:59:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:26,214 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-11-22 14:59:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:59:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 25 [2021-11-22 14:59:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:26,215 INFO L225 Difference]: With dead ends: 47 [2021-11-22 14:59:26,215 INFO L226 Difference]: Without dead ends: 35 [2021-11-22 14:59:26,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:59:26,216 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:26,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:59:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-22 14:59:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-11-22 14:59:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-22 14:59:26,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2021-11-22 14:59:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:26,223 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-22 14:59:26,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 14:59:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-22 14:59:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 14:59:26,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:26,225 INFO L514 BasicCegarLoop]: 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] [2021-11-22 14:59:26,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:59:26,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:26,438 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:59:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2021-11-22 14:59:26,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:26,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085084136] [2021-11-22 14:59:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:26,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:26,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:59:26,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933254916] [2021-11-22 14:59:26,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:59:26,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:59:26,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:59:26,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:59:26,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:59:26,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:59:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:59:26,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 14:59:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:59:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:59:26,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:26,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:59:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 53 treesize of output 37 [2021-11-22 14:59:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:59:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 43 [2021-11-22 14:59:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 35 [2021-11-22 14:59:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 35 [2021-11-22 14:59:27,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:59:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:59:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 14:59:27,682 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-22 14:59:27,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 38 [2021-11-22 14:59:27,839 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-22 14:59:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 50 [2021-11-22 14:59:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:27,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:59:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:44,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:44,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085084136] [2021-11-22 14:59:44,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:59:44,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933254916] [2021-11-22 14:59:44,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933254916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:59:44,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:59:44,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-11-22 14:59:44,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384275076] [2021-11-22 14:59:44,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:59:44,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-22 14:59:44,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-22 14:59:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1341, Unknown=1, NotChecked=0, Total=1482 [2021-11-22 14:59:44,431 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:00:09,096 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-22 15:00:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 15:00:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 15:00:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:00:09,099 INFO L225 Difference]: With dead ends: 94 [2021-11-22 15:00:09,100 INFO L226 Difference]: Without dead ends: 81 [2021-11-22 15:00:09,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=284, Invalid=3021, Unknown=1, NotChecked=0, Total=3306 [2021-11-22 15:00:09,102 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:00:09,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 596 Invalid, 0 Unknown, 381 Unchecked, 2.0s Time] [2021-11-22 15:00:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-22 15:00:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-11-22 15:00:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-11-22 15:00:09,117 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 31 [2021-11-22 15:00:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:00:09,118 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-11-22 15:00:09,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-11-22 15:00:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:00:09,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:00:09,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:00:09,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:00:09,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:00:09,321 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:00:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:00:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash 207824378, now seen corresponding path program 5 times [2021-11-22 15:00:09,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:00:09,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53572817] [2021-11-22 15:00:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:00:09,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:00:09,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:00:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877433719] [2021-11-22 15:00:09,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:00:09,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:00:09,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:00:09,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:00:09,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:00:09,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 15:00:09,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:00:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:00:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:00:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:00:09,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:00:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:00:09,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:00:09,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53572817] [2021-11-22 15:00:09,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:00:09,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877433719] [2021-11-22 15:00:09,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877433719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:00:09,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:00:09,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-22 15:00:09,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684028211] [2021-11-22 15:00:09,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:00:09,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:00:09,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:00:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:00:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:00:09,700 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:00:09,958 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2021-11-22 15:00:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:00:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 15:00:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:00:09,960 INFO L225 Difference]: With dead ends: 116 [2021-11-22 15:00:09,960 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 15:00:09,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:00:09,961 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:00:09,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 33 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:00:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 15:00:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-11-22 15:00:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 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) [2021-11-22 15:00:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-11-22 15:00:09,974 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 33 [2021-11-22 15:00:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:00:09,975 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-11-22 15:00:09,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-11-22 15:00:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 15:00:09,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:00:09,976 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:00:09,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:00:10,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:00:10,182 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:00:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:00:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash 236928956, now seen corresponding path program 6 times [2021-11-22 15:00:10,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:00:10,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413107876] [2021-11-22 15:00:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:00:10,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:00:10,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:00:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971375841] [2021-11-22 15:00:10,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:00:10,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:00:10,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:00:10,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:00:10,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:00:10,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 15:00:10,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:00:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:00:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:00:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 15:00:10,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:00:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 15:00:10,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:00:10,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413107876] [2021-11-22 15:00:10,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:00:10,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971375841] [2021-11-22 15:00:10,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971375841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:00:10,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:00:10,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-22 15:00:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955407916] [2021-11-22 15:00:10,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:00:10,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:00:10,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:00:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:00:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:00:10,517 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:00:10,720 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-22 15:00:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:00:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 15:00:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:00:10,721 INFO L225 Difference]: With dead ends: 69 [2021-11-22 15:00:10,721 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 15:00:10,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:00:10,723 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:00:10,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 23 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:00:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 15:00:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2021-11-22 15:00:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-22 15:00:10,731 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2021-11-22 15:00:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:00:10,731 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-22 15:00:10,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:00:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-22 15:00:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 15:00:10,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:00:10,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:00:10,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:00:10,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:00:10,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:00:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:00:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash 315843584, now seen corresponding path program 7 times [2021-11-22 15:00:10,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:00:10,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336788385] [2021-11-22 15:00:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:00:10,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:00:10,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:00:10,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065655110] [2021-11-22 15:00:10,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:00:10,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:00:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:00:10,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:00:10,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:00:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:00:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-22 15:00:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:00:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:00:11,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:00:11,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 54 [2021-11-22 15:00:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 49 [2021-11-22 15:00:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:00:11,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:11,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 51 [2021-11-22 15:00:12,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:00:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 51 [2021-11-22 15:00:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 47 [2021-11-22 15:00:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 45 [2021-11-22 15:00:12,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:00:12,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:00:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:00:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:00:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 54 [2021-11-22 15:00:12,842 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-22 15:00:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 49 [2021-11-22 15:00:13,025 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-22 15:00:13,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 52 [2021-11-22 15:00:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:00:13,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:16,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:16,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336788385] [2021-11-22 15:04:16,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:04:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065655110] [2021-11-22 15:04:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065655110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:16,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:04:16,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-11-22 15:04:16,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852626193] [2021-11-22 15:04:16,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:16,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 15:04:16,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 15:04:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2727, Unknown=36, NotChecked=0, Total=2970 [2021-11-22 15:04:16,536 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 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) [2021-11-22 15:04:52,964 WARN L227 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 125 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:06:13,741 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 147 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:07:31,165 WARN L227 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 143 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:07:32,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:37,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:39,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:41,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:45,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:48,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:51,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:53,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:07:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:55,818 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-11-22 15:07:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 15:07:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 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 39 [2021-11-22 15:07:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:55,820 INFO L225 Difference]: With dead ends: 88 [2021-11-22 15:07:55,821 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 15:07:55,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 418.0s TimeCoverageRelationStatistics Valid=294, Invalid=3940, Unknown=56, NotChecked=0, Total=4290 [2021-11-22 15:07:55,825 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 82 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 42.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:55,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1004 Invalid, 2 Unknown, 298 Unchecked, 42.2s Time] [2021-11-22 15:07:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 15:07:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-11-22 15:07:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 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) [2021-11-22 15:07:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-11-22 15:07:55,841 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 39 [2021-11-22 15:07:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:55,842 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-11-22 15:07:55,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 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) [2021-11-22 15:07:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-11-22 15:07:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:07:55,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:55,845 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:55,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:07:56,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:56,074 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1363759742, now seen corresponding path program 8 times [2021-11-22 15:07:56,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:56,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277160451] [2021-11-22 15:07:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:56,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:56,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:07:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566380005] [2021-11-22 15:07:56,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:07:56,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:56,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:56,111 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:56,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:07:56,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:07:56,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:07:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:07:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:07:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:07:56,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:07:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:07:56,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277160451] [2021-11-22 15:07:56,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:07:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566380005] [2021-11-22 15:07:56,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566380005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:07:56,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:07:56,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-22 15:07:56,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675572502] [2021-11-22 15:07:56,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:07:56,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:07:56,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:07:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:07:56,672 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-11-22 15:07:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:57,139 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-11-22 15:07:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 15:07:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 41 [2021-11-22 15:07:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:57,141 INFO L225 Difference]: With dead ends: 123 [2021-11-22 15:07:57,141 INFO L226 Difference]: Without dead ends: 77 [2021-11-22 15:07:57,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:07:57,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:57,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 43 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:07:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-22 15:07:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-11-22 15:07:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 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) [2021-11-22 15:07:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-11-22 15:07:57,168 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2021-11-22 15:07:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:57,168 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-11-22 15:07:57,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-11-22 15:07:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-11-22 15:07:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:07:57,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:57,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:57,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-22 15:07:57,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:07:57,383 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash -702683966, now seen corresponding path program 9 times [2021-11-22 15:07:57,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:57,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739592961] [2021-11-22 15:07:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:57,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:57,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:07:57,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521997049] [2021-11-22 15:07:57,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:07:57,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:57,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:57,437 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:57,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:07:57,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 15:07:57,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:07:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:07:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:07:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:07:57,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:07:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:07:58,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739592961] [2021-11-22 15:07:58,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:07:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521997049] [2021-11-22 15:07:58,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521997049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:07:58,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:07:58,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-22 15:07:58,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034853787] [2021-11-22 15:07:58,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:07:58,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:07:58,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:07:58,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:07:58,035 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-11-22 15:07:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:58,478 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-11-22 15:07:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 15:07:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 41 [2021-11-22 15:07:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:58,480 INFO L225 Difference]: With dead ends: 71 [2021-11-22 15:07:58,480 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 15:07:58,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:07:58,481 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:58,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 29 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:07:58,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 15:07:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-11-22 15:07:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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) [2021-11-22 15:07:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-11-22 15:07:58,492 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-11-22 15:07:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:58,492 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-11-22 15:07:58,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-11-22 15:07:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-11-22 15:07:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-22 15:07:58,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:58,495 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:58,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:07:58,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:58,716 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1719679608, now seen corresponding path program 10 times [2021-11-22 15:07:58,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:58,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490571931] [2021-11-22 15:07:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:58,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:58,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:07:58,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951626269] [2021-11-22 15:07:58,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:07:58,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:58,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:58,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c478e2ed-9a6a-416d-bee6-2d7dffc23303/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:07:58,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:07:58,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:07:58,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-22 15:07:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:07:58,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:07:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:58,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:07:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-22 15:07:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 44 [2021-11-22 15:07:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 54 [2021-11-22 15:07:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:07:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 63 [2021-11-22 15:07:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:07:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:07:59,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 66 [2021-11-22 15:08:00,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:00,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 61 [2021-11-22 15:08:00,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:00,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 63 [2021-11-22 15:08:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 63 [2021-11-22 15:08:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 63 [2021-11-22 15:08:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 83 treesize of output 65 [2021-11-22 15:08:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:01,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 65 [2021-11-22 15:08:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2021-11-22 15:08:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:02,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 63 [2021-11-22 15:08:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 66 [2021-11-22 15:08:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:08:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:08:02,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 75 treesize of output 69 [2021-11-22 15:08:03,295 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-11-22 15:08:03,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 62 treesize of output 58 [2021-11-22 15:08:03,545 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-22 15:08:03,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 56 [2021-11-22 15:08:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:08:03,659 INFO L328 TraceCheckSpWp]: Computing backward predicates...