./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s52if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s52if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX --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 adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:31:09,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:31:09,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:31:09,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:31:09,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:31:09,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:31:09,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:31:09,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:31:09,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:31:09,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:31:09,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:31:09,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:31:09,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:31:09,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:31:09,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:31:09,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:31:09,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:31:09,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:31:09,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:31:09,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:31:09,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:31:09,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:31:09,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:31:09,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:31:09,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:31:09,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:31:09,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:31:09,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:31:09,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:31:09,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:31:09,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:31:09,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:31:09,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:31:09,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:31:09,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:31:09,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:31:09,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:31:09,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:31:09,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:31:09,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:31:09,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:31:09,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:31:09,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:31:09,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:31:09,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:31:09,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:31:09,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:31:09,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:31:09,275 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:31:09,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:31:09,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:31:09,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:31:09,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:31:09,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:31:09,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:31:09,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:31:09,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:31:09,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:31:09,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:31:09,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:31:09,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:31:09,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:31:09,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:31:09,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:31:09,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:31:09,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:31:09,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:31:09,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:31:09,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:31:09,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:31:09,281 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:31:09,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:31:09,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:31:09,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:31:09,284 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_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 [2021-11-09 08:31:09,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:31:09,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:31:09,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:31:09,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:31:09,631 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:31:09,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-fpi/s52if.c [2021-11-09 08:31:09,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/d0be53fbe/586bc3d590cc4c75811a088619c44f54/FLAGe9323cd96 [2021-11-09 08:31:10,277 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:31:10,279 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/sv-benchmarks/c/array-fpi/s52if.c [2021-11-09 08:31:10,299 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/d0be53fbe/586bc3d590cc4c75811a088619c44f54/FLAGe9323cd96 [2021-11-09 08:31:10,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/d0be53fbe/586bc3d590cc4c75811a088619c44f54 [2021-11-09 08:31:10,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:31:10,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:31:10,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:31:10,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:31:10,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:31:10,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:31:10" (1/1) ... [2021-11-09 08:31:10,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9a2adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:10, skipping insertion in model container [2021-11-09 08:31:10,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:31:10" (1/1) ... [2021-11-09 08:31:10,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:31:10,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:31:10,907 WARN L228 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_2cc10a61-b540-4dda-968e-87483a6e72e6/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2021-11-09 08:31:10,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:31:10,954 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:31:10,968 WARN L228 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_2cc10a61-b540-4dda-968e-87483a6e72e6/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2021-11-09 08:31:10,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:31:11,010 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:31:11,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11 WrapperNode [2021-11-09 08:31:11,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:31:11,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:31:11,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:31:11,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:31:11,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:31:11,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:31:11,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:31:11,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:31:11,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:31:11,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:31:11,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:31:11,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:31:11,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (1/1) ... [2021-11-09 08:31:11,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:31:11,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:11,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:31:11,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:31:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:31:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:31:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:31:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:31:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:31:11,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:31:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:31:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:31:11,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:31:11,571 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 08:31:11,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:11 BoogieIcfgContainer [2021-11-09 08:31:11,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:31:11,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:31:11,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:31:11,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:31:11,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:31:10" (1/3) ... [2021-11-09 08:31:11,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434e2dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:31:11, skipping insertion in model container [2021-11-09 08:31:11,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:31:11" (2/3) ... [2021-11-09 08:31:11,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434e2dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:31:11, skipping insertion in model container [2021-11-09 08:31:11,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:11" (3/3) ... [2021-11-09 08:31:11,598 INFO L111 eAbstractionObserver]: Analyzing ICFG s52if.c [2021-11-09 08:31:11,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:31:11,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:31:11,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:31:11,674 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 [2021-11-09 08:31:11,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:31:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:31:11,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:11,698 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:11,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-11-09 08:31:11,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:11,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492488968] [2021-11-09 08:31:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:11,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:11,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:11,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492488968] [2021-11-09 08:31:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492488968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:11,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:11,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:31:11,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735918329] [2021-11-09 08:31:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:31:11,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:11,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:31:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:31:11,922 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:11,936 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-09 08:31:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:31:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 08:31:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:11,960 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:31:11,960 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 08:31:11,962 INFO L786 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 [2021-11-09 08:31:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 08:31:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 08:31:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-09 08:31:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 08:31:11,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-09 08:31:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:11,995 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 08:31:11,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 08:31:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:31:11,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:11,996 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:11,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:31:11,997 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:12,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-11-09 08:31:12,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:12,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485416128] [2021-11-09 08:31:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:12,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:12,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:12,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485416128] [2021-11-09 08:31:12,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485416128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:12,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:12,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:31:12,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770859909] [2021-11-09 08:31:12,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:12,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:12,135 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:12,231 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-09 08:31:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:31:12,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 08:31:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:12,235 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:31:12,236 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:31:12,237 INFO L786 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 [2021-11-09 08:31:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:31:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-09 08:31:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 08:31:12,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-09 08:31:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:12,250 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 08:31:12,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 08:31:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:31:12,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:12,253 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:12,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:31:12,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-11-09 08:31:12,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:12,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147706528] [2021-11-09 08:31:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:12,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:12,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:12,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147706528] [2021-11-09 08:31:12,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147706528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:12,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517833514] [2021-11-09 08:31:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:12,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:12,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:31:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:31:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:13,065 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 [2021-11-09 08:31:13,076 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 [2021-11-09 08:31:13,123 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 [2021-11-09 08:31:13,435 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-09 08:31:13,435 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 2 case distinctions, treesize of input 52 treesize of output 66 [2021-11-09 08:31:14,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:31:14,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:14,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:31:14,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774205726] [2021-11-09 08:31:14,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:14,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:14,326 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:14,769 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-09 08:31:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:31:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:31:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:14,773 INFO L225 Difference]: With dead ends: 57 [2021-11-09 08:31:14,773 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:31:14,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:31:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:31:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-11-09 08:31:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-11-09 08:31:14,782 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 21 [2021-11-09 08:31:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:14,782 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-11-09 08:31:14,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-11-09 08:31:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:31:14,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:14,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:14,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:15,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:15,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-11-09 08:31:15,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:15,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341023281] [2021-11-09 08:31:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:15,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:15,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:15,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051687304] [2021-11-09 08:31:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:15,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:15,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:15,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:15,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:31:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:31:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:15,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 08:31:15,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:31:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:15,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:15,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341023281] [2021-11-09 08:31:15,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:15,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051687304] [2021-11-09 08:31:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051687304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:15,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:15,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:31:15,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284189009] [2021-11-09 08:31:15,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:31:15,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:15,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:31:15,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:31:15,333 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:15,438 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2021-11-09 08:31:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:31:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:31:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:15,440 INFO L225 Difference]: With dead ends: 69 [2021-11-09 08:31:15,440 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 08:31:15,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:31:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 08:31:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-09 08:31:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-09 08:31:15,458 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 21 [2021-11-09 08:31:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:15,458 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-09 08:31:15,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-09 08:31:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:31:15,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:15,460 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:15,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:15,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:15,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1592625659, now seen corresponding path program 1 times [2021-11-09 08:31:15,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:15,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857172842] [2021-11-09 08:31:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:15,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:15,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:15,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097627155] [2021-11-09 08:31:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:15,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:15,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:15,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:31:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:15,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:31:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:15,809 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 [2021-11-09 08:31:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:31:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:15,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:15,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857172842] [2021-11-09 08:31:15,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:15,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097627155] [2021-11-09 08:31:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097627155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:15,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:15,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:31:15,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506005799] [2021-11-09 08:31:15,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:31:15,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:31:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:15,902 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:15,990 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-11-09 08:31:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:31:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:31:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:15,992 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:31:15,995 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 08:31:15,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:31:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 08:31:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-09 08:31:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-11-09 08:31:16,008 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 21 [2021-11-09 08:31:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-11-09 08:31:16,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-11-09 08:31:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:31:16,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:16,011 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:16,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:16,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:16,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-11-09 08:31:16,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:16,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096083601] [2021-11-09 08:31:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:16,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:16,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:16,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096083601] [2021-11-09 08:31:16,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096083601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:16,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086892757] [2021-11-09 08:31:16,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:16,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:16,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:16,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:16,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:31:16,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:31:16,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:16,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086892757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:16,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:16,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:31:16,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503200828] [2021-11-09 08:31:16,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:16,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:16,536 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:16,731 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-11-09 08:31:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:31:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 08:31:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:16,734 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:31:16,734 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:31:16,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:31:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2021-11-09 08:31:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-11-09 08:31:16,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 23 [2021-11-09 08:31:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:16,742 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-11-09 08:31:16,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-11-09 08:31:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:31:16,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:16,744 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:16,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:16,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:31:16,972 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-11-09 08:31:16,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:16,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706522728] [2021-11-09 08:31:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:16,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:17,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:17,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706522728] [2021-11-09 08:31:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706522728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:17,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130420310] [2021-11-09 08:31:17,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:17,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:17,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:17,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:31:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:31:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:31:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:17,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130420310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:17,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:17,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 08:31:17,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228730416] [2021-11-09 08:31:17,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:17,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:17,255 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:17,384 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-11-09 08:31:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:31:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:31:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:17,385 INFO L225 Difference]: With dead ends: 65 [2021-11-09 08:31:17,386 INFO L226 Difference]: Without dead ends: 35 [2021-11-09 08:31:17,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:31:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-09 08:31:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-09 08:31:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-11-09 08:31:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-09 08:31:17,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2021-11-09 08:31:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:17,395 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-09 08:31:17,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-09 08:31:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:17,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:17,398 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:17,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:17,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:31:17,612 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-11-09 08:31:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:17,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523210286] [2021-11-09 08:31:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:17,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:31:18,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:18,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523210286] [2021-11-09 08:31:18,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523210286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:18,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665149267] [2021-11-09 08:31:18,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:18,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:18,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:18,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:18,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:31:18,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:18,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:31:18,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:18,261 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 [2021-11-09 08:31:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:18,302 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 [2021-11-09 08:31:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:18,414 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:31:18,415 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:31:18,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:18,730 INFO L354 Elim1Store]: treesize reduction 62, result has 44.1 percent of original size [2021-11-09 08:31:18,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 78 [2021-11-09 08:31:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:19,181 INFO L354 Elim1Store]: treesize reduction 62, result has 44.1 percent of original size [2021-11-09 08:31:19,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 91 [2021-11-09 08:31:20,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:31:20,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:20,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 08:31:20,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237967954] [2021-11-09 08:31:20,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:31:20,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:31:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:31:20,753 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:21,620 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-11-09 08:31:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:31:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:21,622 INFO L225 Difference]: With dead ends: 73 [2021-11-09 08:31:21,623 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:31:21,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:31:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:31:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2021-11-09 08:31:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2021-11-09 08:31:21,631 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 29 [2021-11-09 08:31:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:21,632 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2021-11-09 08:31:21,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2021-11-09 08:31:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:21,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:21,633 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:21,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 08:31:21,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:21,840 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-11-09 08:31:21,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:21,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740914414] [2021-11-09 08:31:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:21,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:21,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:21,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141114274] [2021-11-09 08:31:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:21,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:21,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:21,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:31:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:31:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:22,071 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 [2021-11-09 08:31:22,152 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 31 treesize of output 15 [2021-11-09 08:31:22,252 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-09 08:31:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 08:31:22,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 08:31:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:31:22,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:22,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740914414] [2021-11-09 08:31:22,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:22,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141114274] [2021-11-09 08:31:22,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141114274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:22,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:22,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:31:22,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673869298] [2021-11-09 08:31:22,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:31:22,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:31:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:31:22,328 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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) [2021-11-09 08:31:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:22,505 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-11-09 08:31:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:31:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:22,507 INFO L225 Difference]: With dead ends: 116 [2021-11-09 08:31:22,507 INFO L226 Difference]: Without dead ends: 101 [2021-11-09 08:31:22,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-09 08:31:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2021-11-09 08:31:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-11-09 08:31:22,515 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 29 [2021-11-09 08:31:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:22,515 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-11-09 08:31:22,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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) [2021-11-09 08:31:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-11-09 08:31:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:22,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:22,517 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:22,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:22,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:22,728 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 665625072, now seen corresponding path program 2 times [2021-11-09 08:31:22,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:22,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519739133] [2021-11-09 08:31:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:22,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:22,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:22,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092141795] [2021-11-09 08:31:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:22,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:22,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:22,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:31:22,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:31:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:23,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 08:31:23,067 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-09 08:31:23,068 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 36 treesize of output 27 [2021-11-09 08:31:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:31:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:31:23,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:23,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519739133] [2021-11-09 08:31:23,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:23,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092141795] [2021-11-09 08:31:23,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092141795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:23,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:23,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:31:23,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067561303] [2021-11-09 08:31:23,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:31:23,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:23,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:31:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:31:23,140 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:23,227 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-11-09 08:31:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:31:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:23,229 INFO L225 Difference]: With dead ends: 88 [2021-11-09 08:31:23,229 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 08:31:23,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 08:31:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-09 08:31:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-11-09 08:31:23,237 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 29 [2021-11-09 08:31:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:23,238 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-11-09 08:31:23,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-11-09 08:31:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:31:23,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:23,247 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:23,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 08:31:23,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:23,476 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2021-11-09 08:31:23,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:23,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420206668] [2021-11-09 08:31:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:23,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:23,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:23,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431095392] [2021-11-09 08:31:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:23,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:23,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:23,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:31:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:31:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:23,717 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 13 treesize of output 9 [2021-11-09 08:31:23,764 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-09 08:31:23,765 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 35 treesize of output 26 [2021-11-09 08:31:23,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 08:31:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:31:23,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:23,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420206668] [2021-11-09 08:31:23,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:23,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431095392] [2021-11-09 08:31:23,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431095392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:23,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:23,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 08:31:23,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118424797] [2021-11-09 08:31:23,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:31:23,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:31:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:31:23,834 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2021-11-09 08:31:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:23,916 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2021-11-09 08:31:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:31:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:31:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:23,918 INFO L225 Difference]: With dead ends: 92 [2021-11-09 08:31:23,918 INFO L226 Difference]: Without dead ends: 68 [2021-11-09 08:31:23,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:31:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-09 08:31:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-11-09 08:31:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-09 08:31:23,926 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 29 [2021-11-09 08:31:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:23,926 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-09 08:31:23,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2021-11-09 08:31:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-09 08:31:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:31:23,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:23,928 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:23,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:24,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:24,144 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2021-11-09 08:31:24,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:24,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925411688] [2021-11-09 08:31:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:24,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:31:24,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:24,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925411688] [2021-11-09 08:31:24,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925411688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:24,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754604877] [2021-11-09 08:31:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:24,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:24,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:24,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:31:24,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:31:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:31:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:31:24,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754604877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:24,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:24,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:31:24,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42372414] [2021-11-09 08:31:24,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:31:24,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:31:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:24,608 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:24,919 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-11-09 08:31:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:31:24,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-11-09 08:31:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:24,920 INFO L225 Difference]: With dead ends: 82 [2021-11-09 08:31:24,920 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:31:24,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:31:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:31:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-11-09 08:31:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-09 08:31:24,935 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 31 [2021-11-09 08:31:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:24,936 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-09 08:31:24,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-09 08:31:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:31:24,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:24,937 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:24,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:25,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:25,162 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2021-11-09 08:31:25,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:25,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86643834] [2021-11-09 08:31:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:25,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:31:25,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:25,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86643834] [2021-11-09 08:31:25,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86643834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:25,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409075439] [2021-11-09 08:31:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:25,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:25,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:25,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:31:25,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 08:31:25,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:31:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:31:25,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409075439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:25,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:25,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 08:31:25,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966217179] [2021-11-09 08:31:25,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:31:25,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:31:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:25,594 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:25,762 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-11-09 08:31:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:31:25,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 08:31:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:25,764 INFO L225 Difference]: With dead ends: 77 [2021-11-09 08:31:25,764 INFO L226 Difference]: Without dead ends: 43 [2021-11-09 08:31:25,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-09 08:31:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-11-09 08:31:25,768 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) [2021-11-09 08:31:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-09 08:31:25,768 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2021-11-09 08:31:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:25,768 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-09 08:31:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-09 08:31:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:31:25,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:25,770 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:25,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:25,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:31:25,970 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2021-11-09 08:31:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:25,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904549806] [2021-11-09 08:31:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:25,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:31:26,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:26,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904549806] [2021-11-09 08:31:26,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904549806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:26,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608975884] [2021-11-09 08:31:26,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:26,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:26,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:31:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:31:26,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:26,837 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 [2021-11-09 08:31:26,840 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 [2021-11-09 08:31:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:26,858 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 [2021-11-09 08:31:26,964 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:31:26,965 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:31:27,078 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 08:31:27,078 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 3 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 08:31:27,429 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-09 08:31:27,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 58 treesize of output 106 [2021-11-09 08:31:27,876 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-09 08:31:27,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 115 treesize of output 131 [2021-11-09 08:31:28,977 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-09 08:31:28,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 206 treesize of output 168 [2021-11-09 08:31:35,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:31:35,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:35,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 08:31:35,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354336577] [2021-11-09 08:31:35,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:31:35,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:35,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:31:35,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:31:35,570 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:36,407 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-09 08:31:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:31:36,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:31:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:36,408 INFO L225 Difference]: With dead ends: 70 [2021-11-09 08:31:36,408 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 08:31:36,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:31:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 08:31:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-09 08:31:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-11-09 08:31:36,416 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 37 [2021-11-09 08:31:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:36,417 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-11-09 08:31:36,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-11-09 08:31:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:31:36,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:36,418 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:36,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:36,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:31:36,632 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1441037607, now seen corresponding path program 3 times [2021-11-09 08:31:36,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:36,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114554606] [2021-11-09 08:31:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:36,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:36,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:36,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712749197] [2021-11-09 08:31:36,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:36,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:36,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:36,656 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:36,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:31:37,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:31:37,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:31:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:37,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 08:31:37,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:37,432 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-09 08:31:37,433 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 1 case distinctions, treesize of input 45 treesize of output 43 [2021-11-09 08:31:37,525 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-09 08:31:37,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 48 [2021-11-09 08:31:37,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:31:37,581 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 31 treesize of output 31 [2021-11-09 08:31:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:31:37,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:37,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114554606] [2021-11-09 08:31:37,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:37,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712749197] [2021-11-09 08:31:37,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712749197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:37,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:37,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:31:37,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805904383] [2021-11-09 08:31:37,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:31:37,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:31:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:37,652 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:37,945 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-11-09 08:31:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:31:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:31:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:37,947 INFO L225 Difference]: With dead ends: 98 [2021-11-09 08:31:37,947 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 08:31:37,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:31:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 08:31:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-11-09 08:31:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-11-09 08:31:37,967 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 37 [2021-11-09 08:31:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:37,968 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-11-09 08:31:37,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-11-09 08:31:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:31:37,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:37,970 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:38,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:38,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:31:38,190 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2063837675, now seen corresponding path program 4 times [2021-11-09 08:31:38,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:38,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297904618] [2021-11-09 08:31:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:38,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:38,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:38,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210900641] [2021-11-09 08:31:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:38,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:38,204 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:38,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:31:38,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:38,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:31:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:38,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 08:31:38,751 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-09 08:31:38,752 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 38 treesize of output 29 [2021-11-09 08:31:38,861 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-09 08:31:38,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 38 [2021-11-09 08:31:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 08:31:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:31:38,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:38,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297904618] [2021-11-09 08:31:38,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:38,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210900641] [2021-11-09 08:31:38,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210900641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:38,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:38,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 08:31:38,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915117833] [2021-11-09 08:31:38,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:31:38,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:31:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:31:38,936 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:39,115 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2021-11-09 08:31:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:31:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:31:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:39,116 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:31:39,116 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 08:31:39,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 08:31:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-09 08:31:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-09 08:31:39,133 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 37 [2021-11-09 08:31:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:39,133 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-09 08:31:39,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-09 08:31:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:31:39,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:39,136 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:39,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:39,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:31:39,348 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -147310295, now seen corresponding path program 2 times [2021-11-09 08:31:39,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:39,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098337951] [2021-11-09 08:31:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:39,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:39,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:31:39,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348050467] [2021-11-09 08:31:39,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:39,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:39,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:39,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:31:39,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:31:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:39,877 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 13 treesize of output 9 [2021-11-09 08:31:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:39,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:31:39,943 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 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-09 08:31:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:39,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:31:39,993 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 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-09 08:31:40,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:31:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:40,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:40,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098337951] [2021-11-09 08:31:40,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:31:40,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348050467] [2021-11-09 08:31:40,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348050467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:40,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:31:40,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 08:31:40,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097475579] [2021-11-09 08:31:40,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:31:40,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:31:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:31:40,075 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:40,182 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-11-09 08:31:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:31:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:31:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:40,184 INFO L225 Difference]: With dead ends: 142 [2021-11-09 08:31:40,184 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 08:31:40,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:31:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 08:31:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-11-09 08:31:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-11-09 08:31:40,194 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 37 [2021-11-09 08:31:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:40,194 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-11-09 08:31:40,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-11-09 08:31:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:31:40,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:40,195 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:40,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:40,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:40,404 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1016239403, now seen corresponding path program 8 times [2021-11-09 08:31:40,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:40,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152092541] [2021-11-09 08:31:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:40,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:40,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:40,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152092541] [2021-11-09 08:31:40,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152092541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:40,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411350308] [2021-11-09 08:31:40,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:40,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:40,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:40,540 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:40,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:31:40,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:31:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:41,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411350308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:41,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:41,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 08:31:41,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549376379] [2021-11-09 08:31:41,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:31:41,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:31:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:41,090 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:41,450 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-11-09 08:31:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:31:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-11-09 08:31:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:41,452 INFO L225 Difference]: With dead ends: 136 [2021-11-09 08:31:41,452 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 08:31:41,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:31:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 08:31:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 71. [2021-11-09 08:31:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-09 08:31:41,461 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 39 [2021-11-09 08:31:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:41,462 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-09 08:31:41,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-09 08:31:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:31:41,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:41,463 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:41,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:41,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:31:41,680 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1682760144, now seen corresponding path program 9 times [2021-11-09 08:31:41,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:41,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047992260] [2021-11-09 08:31:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:41,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:41,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047992260] [2021-11-09 08:31:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047992260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117966936] [2021-11-09 08:31:41,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:41,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:41,780 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:41,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:31:42,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:31:42,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:31:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:31:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117966936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:42,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:42,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 08:31:42,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934812547] [2021-11-09 08:31:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:31:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:42,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:31:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:42,406 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:42,627 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-11-09 08:31:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:31:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 08:31:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:42,629 INFO L225 Difference]: With dead ends: 132 [2021-11-09 08:31:42,629 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 08:31:42,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 08:31:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-11-09 08:31:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-11-09 08:31:42,638 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 40 [2021-11-09 08:31:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:42,638 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-11-09 08:31:42,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-11-09 08:31:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:31:42,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:42,640 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:42,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:42,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:42,852 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2111860654, now seen corresponding path program 10 times [2021-11-09 08:31:42,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:42,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914388163] [2021-11-09 08:31:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:42,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:31:43,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:43,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914388163] [2021-11-09 08:31:43,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914388163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:43,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738721714] [2021-11-09 08:31:43,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:43,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:43,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:43,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:31:44,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:44,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:44,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:31:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:44,093 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 [2021-11-09 08:31:44,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:44,145 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 [2021-11-09 08:31:44,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:44,265 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:31:44,265 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 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:31:44,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:44,435 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-09 08:31:44,435 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 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 08:31:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:44,656 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-11-09 08:31:44,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-09 08:31:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:45,108 INFO L354 Elim1Store]: treesize reduction 178, result has 35.7 percent of original size [2021-11-09 08:31:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 67 treesize of output 134 [2021-11-09 08:31:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:46,664 INFO L354 Elim1Store]: treesize reduction 266, result has 32.8 percent of original size [2021-11-09 08:31:46,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 163 treesize of output 229 [2021-11-09 08:31:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:31:51,792 INFO L354 Elim1Store]: treesize reduction 178, result has 35.7 percent of original size [2021-11-09 08:31:51,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 377 treesize of output 254 [2021-11-09 08:32:15,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:32:15,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:15,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 08:32:15,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55010031] [2021-11-09 08:32:15,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:32:15,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:32:15,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:32:15,188 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:16,462 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-11-09 08:32:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:32:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:32:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:16,464 INFO L225 Difference]: With dead ends: 118 [2021-11-09 08:32:16,464 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 08:32:16,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=279, Invalid=2583, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:32:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 08:32:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2021-11-09 08:32:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2021-11-09 08:32:16,477 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 45 [2021-11-09 08:32:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:16,478 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2021-11-09 08:32:16,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2021-11-09 08:32:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:32:16,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:16,479 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:16,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:16,692 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1431802284, now seen corresponding path program 5 times [2021-11-09 08:32:16,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:16,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736185375] [2021-11-09 08:32:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:16,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:16,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:32:16,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827095110] [2021-11-09 08:32:16,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:16,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:16,705 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:16,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:32:17,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:32:17,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:17,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:32:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:17,370 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 [2021-11-09 08:32:17,488 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 37 treesize of output 17 [2021-11-09 08:32:17,569 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-09 08:32:17,570 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 2 case distinctions, treesize of input 38 treesize of output 29 [2021-11-09 08:32:17,653 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 08:32:17,653 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 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-09 08:32:17,758 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-09 08:32:17,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 08:32:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 08:32:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:32:17,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:17,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736185375] [2021-11-09 08:32:17,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:32:17,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827095110] [2021-11-09 08:32:17,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827095110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:17,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:17,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 08:32:17,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615035790] [2021-11-09 08:32:17,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:32:17,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:32:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:32:17,844 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-09 08:32:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:18,045 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-09 08:32:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:32:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 45 [2021-11-09 08:32:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:18,046 INFO L225 Difference]: With dead ends: 120 [2021-11-09 08:32:18,046 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 08:32:18,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:32:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 08:32:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-09 08:32:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-11-09 08:32:18,060 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 45 [2021-11-09 08:32:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:18,060 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-11-09 08:32:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-09 08:32:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-11-09 08:32:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:32:18,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:18,061 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:18,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 08:32:18,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:18,276 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1422716494, now seen corresponding path program 3 times [2021-11-09 08:32:18,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:18,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063526061] [2021-11-09 08:32:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:18,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:18,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:32:18,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643333316] [2021-11-09 08:32:18,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:32:18,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:18,294 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:18,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:32:18,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:32:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:32:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:19,001 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 15 treesize of output 11 [2021-11-09 08:32:19,144 INFO L354 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2021-11-09 08:32:19,144 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 45 treesize of output 36 [2021-11-09 08:32:19,260 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-09 08:32:19,261 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 48 treesize of output 59 [2021-11-09 08:32:19,479 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-09 08:32:19,479 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 61 treesize of output 64 [2021-11-09 08:32:20,361 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 08:32:20,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 81 [2021-11-09 08:32:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:32:20,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:20,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063526061] [2021-11-09 08:32:20,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:32:20,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643333316] [2021-11-09 08:32:20,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643333316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:20,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:20,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 08:32:20,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961409891] [2021-11-09 08:32:20,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:32:20,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:32:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:32:20,726 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:21,590 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-11-09 08:32:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:32:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:32:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:21,592 INFO L225 Difference]: With dead ends: 146 [2021-11-09 08:32:21,592 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 08:32:21,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:32:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 08:32:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-11-09 08:32:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-11-09 08:32:21,608 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 45 [2021-11-09 08:32:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:21,608 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-11-09 08:32:21,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-11-09 08:32:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:32:21,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:21,610 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:21,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:21,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:32:21,824 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143892, now seen corresponding path program 11 times [2021-11-09 08:32:21,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:21,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486140478] [2021-11-09 08:32:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:21,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:21,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:21,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486140478] [2021-11-09 08:32:21,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486140478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:21,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442222972] [2021-11-09 08:32:21,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:21,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:21,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:21,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:21,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:32:22,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:32:22,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:22,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:32:22,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:22,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442222972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:22,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:22,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 08:32:22,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876125807] [2021-11-09 08:32:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:32:22,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:32:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:32:22,962 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:23,360 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-11-09 08:32:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:32:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 47 [2021-11-09 08:32:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:23,365 INFO L225 Difference]: With dead ends: 179 [2021-11-09 08:32:23,365 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 08:32:23,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:32:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 08:32:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 87. [2021-11-09 08:32:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-11-09 08:32:23,378 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 47 [2021-11-09 08:32:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:23,378 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-11-09 08:32:23,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-11-09 08:32:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:32:23,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:23,379 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:23,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:23,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:32:23,592 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash -220752601, now seen corresponding path program 12 times [2021-11-09 08:32:23,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:23,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463242788] [2021-11-09 08:32:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:23,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:32:23,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:23,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463242788] [2021-11-09 08:32:23,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463242788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:23,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983392798] [2021-11-09 08:32:23,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:32:23,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:23,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:23,724 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:23,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:32:24,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:32:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:32:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:32:24,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983392798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:24,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:24,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 08:32:24,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464852901] [2021-11-09 08:32:24,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:32:24,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:32:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:32:24,653 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:24,885 INFO L93 Difference]: Finished difference Result 172 states and 202 transitions. [2021-11-09 08:32:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:32:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 08:32:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:24,886 INFO L225 Difference]: With dead ends: 172 [2021-11-09 08:32:24,886 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 08:32:24,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:32:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 08:32:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-11-09 08:32:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-09 08:32:24,894 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 48 [2021-11-09 08:32:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:24,894 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-09 08:32:24,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-09 08:32:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:32:24,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:24,895 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:24,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:25,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:25,096 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash 663114381, now seen corresponding path program 13 times [2021-11-09 08:32:25,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:25,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522406482] [2021-11-09 08:32:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:25,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 08:32:26,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:26,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522406482] [2021-11-09 08:32:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522406482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:26,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064977316] [2021-11-09 08:32:26,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:32:26,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:26,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:26,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:26,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:32:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 08:32:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:26,805 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 [2021-11-09 08:32:26,808 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 [2021-11-09 08:32:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:26,823 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 [2021-11-09 08:32:26,928 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 08:32:26,928 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 08:32:27,100 INFO L354 Elim1Store]: treesize reduction 76, result has 20.8 percent of original size [2021-11-09 08:32:27,101 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 3 case distinctions, treesize of input 42 treesize of output 47 [2021-11-09 08:32:27,373 INFO L354 Elim1Store]: treesize reduction 146, result has 18.0 percent of original size [2021-11-09 08:32:27,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 62 [2021-11-09 08:32:27,722 INFO L354 Elim1Store]: treesize reduction 234, result has 15.8 percent of original size [2021-11-09 08:32:27,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 77 [2021-11-09 08:32:28,605 INFO L354 Elim1Store]: treesize reduction 254, result has 32.8 percent of original size [2021-11-09 08:32:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 76 treesize of output 162 [2021-11-09 08:32:31,040 INFO L354 Elim1Store]: treesize reduction 254, result has 32.8 percent of original size [2021-11-09 08:32:31,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 220 treesize of output 220 [2021-11-09 08:32:56,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:32:56,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:56,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 08:32:56,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509848074] [2021-11-09 08:32:56,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:32:56,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:32:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1491, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:32:56,161 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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) [2021-11-09 08:32:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:57,772 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2021-11-09 08:32:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:32:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 08:32:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:57,774 INFO L225 Difference]: With dead ends: 153 [2021-11-09 08:32:57,774 INFO L226 Difference]: Without dead ends: 149 [2021-11-09 08:32:57,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=323, Invalid=3337, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:32:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-09 08:32:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2021-11-09 08:32:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.176923076923077) internal successors, (153), 130 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2021-11-09 08:32:57,787 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 53 [2021-11-09 08:32:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:57,787 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2021-11-09 08:32:57,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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) [2021-11-09 08:32:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2021-11-09 08:32:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:32:57,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:57,788 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:57,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:57,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:32:57,996 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1343172751, now seen corresponding path program 6 times [2021-11-09 08:32:57,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:57,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050404840] [2021-11-09 08:32:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:57,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:58,018 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:32:58,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620036292] [2021-11-09 08:32:58,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:32:58,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:58,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:58,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:32:58,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:32:58,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:32:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:59,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 08:32:59,089 INFO L354 Elim1Store]: treesize reduction 59, result has 16.9 percent of original size [2021-11-09 08:32:59,090 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 38 treesize of output 29 [2021-11-09 08:32:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:59,225 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:32:59,226 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 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-09 08:32:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:59,284 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:32:59,285 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 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-09 08:32:59,375 INFO L354 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2021-11-09 08:32:59,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 49 [2021-11-09 08:32:59,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:32:59,420 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 32 treesize of output 32 [2021-11-09 08:32:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 08:32:59,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:59,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050404840] [2021-11-09 08:32:59,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:32:59,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620036292] [2021-11-09 08:32:59,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620036292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:59,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:32:59,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 08:32:59,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399179085] [2021-11-09 08:32:59,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:32:59,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:32:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:32:59,544 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-11-09 08:33:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:02,531 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2021-11-09 08:33:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:33:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 53 [2021-11-09 08:33:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:02,534 INFO L225 Difference]: With dead ends: 230 [2021-11-09 08:33:02,534 INFO L226 Difference]: Without dead ends: 226 [2021-11-09 08:33:02,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=241, Invalid=948, Unknown=1, NotChecked=0, Total=1190 [2021-11-09 08:33:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-09 08:33:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2021-11-09 08:33:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1921182266009853) internal successors, (242), 203 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2021-11-09 08:33:02,567 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 53 [2021-11-09 08:33:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:02,568 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2021-11-09 08:33:02,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-11-09 08:33:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2021-11-09 08:33:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:33:02,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:02,569 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:02,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:02,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:02,792 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1405212365, now seen corresponding path program 4 times [2021-11-09 08:33:02,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:02,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46336998] [2021-11-09 08:33:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:02,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:02,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:33:02,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630393158] [2021-11-09 08:33:02,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:33:02,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:02,811 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:02,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:33:03,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:33:03,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:33:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:03,745 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 15 treesize of output 11 [2021-11-09 08:33:03,791 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 08:33:03,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:33:03,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:03,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46336998] [2021-11-09 08:33:03,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:33:03,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630393158] [2021-11-09 08:33:03,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:33:03,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:03,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-09 08:33:03,851 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-09 08:33:03,851 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-09 08:33:03,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:33:03,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:04,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:33:04,084 INFO L731 BasicCegarLoop]: Path program histogram: [13, 6, 4, 1, 1, 1, 1] [2021-11-09 08:33:04,086 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 08:33:04,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 08:33:04 BoogieIcfgContainer [2021-11-09 08:33:04,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 08:33:04,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:33:04,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:33:04,108 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:33:04,108 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:31:11" (3/4) ... [2021-11-09 08:33:04,113 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 08:33:04,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:33:04,113 INFO L168 Benchmark]: Toolchain (without parser) took 113476.30 ms. Allocated memory was 90.2 MB in the beginning and 201.3 MB in the end (delta: 111.1 MB). Free memory was 55.9 MB in the beginning and 83.6 MB in the end (delta: -27.7 MB). Peak memory consumption was 81.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:33:04,114 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 62.2 MB in the beginning and 62.1 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:33:04,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.35 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 65.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:33:04,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.96 ms. Allocated memory is still 90.2 MB. Free memory was 65.5 MB in the beginning and 63.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:33:04,115 INFO L168 Benchmark]: Boogie Preprocessor took 52.89 ms. Allocated memory is still 90.2 MB. Free memory was 63.9 MB in the beginning and 62.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:33:04,115 INFO L168 Benchmark]: RCFGBuilder took 448.12 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 51.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:33:04,116 INFO L168 Benchmark]: TraceAbstraction took 112531.98 ms. Allocated memory was 90.2 MB in the beginning and 201.3 MB in the end (delta: 111.1 MB). Free memory was 50.9 MB in the beginning and 84.4 MB in the end (delta: -33.5 MB). Peak memory consumption was 76.0 MB. Max. memory is 16.1 GB. [2021-11-09 08:33:04,116 INFO L168 Benchmark]: Witness Printer took 5.47 ms. Allocated memory is still 201.3 MB. Free memory was 84.4 MB in the beginning and 83.6 MB in the end (delta: 750.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:33:04,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 62.2 MB in the beginning and 62.1 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.35 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 65.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.96 ms. Allocated memory is still 90.2 MB. Free memory was 65.5 MB in the beginning and 63.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.89 ms. Allocated memory is still 90.2 MB. Free memory was 63.9 MB in the beginning and 62.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 448.12 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 51.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 112531.98 ms. Allocated memory was 90.2 MB in the beginning and 201.3 MB in the end (delta: 111.1 MB). Free memory was 50.9 MB in the beginning and 84.4 MB in the end (delta: -33.5 MB). Peak memory consumption was 76.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.47 ms. Allocated memory is still 201.3 MB. Free memory was 84.4 MB in the beginning and 83.6 MB in the end (delta: 750.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX 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 -> adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 [2021-11-09 08:33:07,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:33:07,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:33:07,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:33:07,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:33:07,233 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:33:07,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-fpi/s52if.c [2021-11-09 08:33:07,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/6c50517bc/ea0e7b29a33a4c88aed7e4771f0e4eb7/FLAG2c420c855 [2021-11-09 08:33:07,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:33:07,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/sv-benchmarks/c/array-fpi/s52if.c [2021-11-09 08:33:07,825 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/6c50517bc/ea0e7b29a33a4c88aed7e4771f0e4eb7/FLAG2c420c855 [2021-11-09 08:33:08,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/data/6c50517bc/ea0e7b29a33a4c88aed7e4771f0e4eb7 [2021-11-09 08:33:08,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:33:08,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:33:08,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:33:08,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:33:08,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:33:08,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d93581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08, skipping insertion in model container [2021-11-09 08:33:08,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:33:08,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:33:08,378 WARN L228 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_2cc10a61-b540-4dda-968e-87483a6e72e6/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2021-11-09 08:33:08,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:33:08,411 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:33:08,424 WARN L228 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_2cc10a61-b540-4dda-968e-87483a6e72e6/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2021-11-09 08:33:08,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:33:08,503 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:33:08,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08 WrapperNode [2021-11-09 08:33:08,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:33:08,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:33:08,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:33:08,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:33:08,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:33:08,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:33:08,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:33:08,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:33:08,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:33:08,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:33:08,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:33:08,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:33:08,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (1/1) ... [2021-11-09 08:33:08,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:33:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:08,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:33:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:33:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 08:33:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:33:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-09 08:33:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:33:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 08:33:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:33:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:33:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-09 08:33:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:33:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 08:33:09,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:33:09,225 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 08:33:09,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:33:09 BoogieIcfgContainer [2021-11-09 08:33:09,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:33:09,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:33:09,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:33:09,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:33:09,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:33:08" (1/3) ... [2021-11-09 08:33:09,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6c0824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:33:09, skipping insertion in model container [2021-11-09 08:33:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:08" (2/3) ... [2021-11-09 08:33:09,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6c0824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:33:09, skipping insertion in model container [2021-11-09 08:33:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:33:09" (3/3) ... [2021-11-09 08:33:09,234 INFO L111 eAbstractionObserver]: Analyzing ICFG s52if.c [2021-11-09 08:33:09,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:33:09,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:33:09,286 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:33:09,295 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 [2021-11-09 08:33:09,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:33:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:33:09,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:09,329 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:09,329 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:09,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:09,339 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-11-09 08:33:09,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:33:09,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642675252] [2021-11-09 08:33:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:09,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:33:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:33:09,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:33:09,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 08:33:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 08:33:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:09,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:33:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:09,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:33:09,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642675252] [2021-11-09 08:33:09,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642675252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:09,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 08:33:09,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601878713] [2021-11-09 08:33:09,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:33:09,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:33:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:33:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:33:09,649 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:09,664 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-09 08:33:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:33:09,665 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 08:33:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:09,673 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:33:09,673 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 08:33:09,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:33:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 08:33:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 08:33:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-09 08:33:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 08:33:09,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-09 08:33:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:09,714 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 08:33:09,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 08:33:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:33:09,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:09,715 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:09,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:09,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:33:09,928 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:09,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-11-09 08:33:09,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:33:09,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630243311] [2021-11-09 08:33:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:09,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:33:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:33:09,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:33:09,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 08:33:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:33:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:10,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:33:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:10,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:33:10,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630243311] [2021-11-09 08:33:10,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630243311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:10,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:10,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-09 08:33:10,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815157370] [2021-11-09 08:33:10,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:33:10,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:33:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:33:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:10,480 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:10,902 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-09 08:33:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:33:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 08:33:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:10,903 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:33:10,904 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:33:10,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:33:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:33:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-09 08:33:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 08:33:10,912 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-09 08:33:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:10,913 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 08:33:10,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 08:33:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:33:10,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:10,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:10,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:33:11,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-11-09 08:33:11,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:33:11,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041692935] [2021-11-09 08:33:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:11,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:33:11,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:33:11,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:33:11,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 08:33:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:11,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:33:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:11,427 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 12 treesize of output 10 [2021-11-09 08:33:11,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:11,467 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-09 08:33:11,467 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 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-09 08:33:11,586 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 08:33:11,586 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 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 08:33:12,170 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 08:33:12,170 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 1 case distinctions, treesize of input 42 treesize of output 36 [2021-11-09 08:33:12,614 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 08:33:12,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 50 [2021-11-09 08:33:12,914 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 08:33:12,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 62 [2021-11-09 08:33:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:12,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:33:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:18,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:18,798 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 08:33:18,799 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 779 treesize of output 501 [2021-11-09 08:33:18,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:18,826 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 501 treesize of output 479 [2021-11-09 08:33:18,850 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 08:33:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 631 treesize of output 625 [2021-11-09 08:33:18,872 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 617 treesize of output 615 [2021-11-09 08:33:18,891 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 611 treesize of output 609 [2021-11-09 08:33:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:19,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:33:19,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041692935] [2021-11-09 08:33:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041692935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:33:19,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:19,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-09 08:33:19,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063402803] [2021-11-09 08:33:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:33:19,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:33:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:33:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=448, Unknown=1, NotChecked=0, Total=552 [2021-11-09 08:33:19,331 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:41,109 WARN L207 SmtUtils]: Spent 14.07 s on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-11-09 08:34:00,385 WARN L207 SmtUtils]: Spent 15.68 s on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-11-09 08:34:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:01,978 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-11-09 08:34:01,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:34:01,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:34:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:01,983 INFO L225 Difference]: With dead ends: 76 [2021-11-09 08:34:01,983 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 08:34:01,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=330, Invalid=1389, Unknown=3, NotChecked=0, Total=1722 [2021-11-09 08:34:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 08:34:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-11-09 08:34:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-11-09 08:34:01,996 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 21 [2021-11-09 08:34:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:01,996 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-11-09 08:34:01,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-11-09 08:34:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:34:01,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:01,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:02,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:02,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:02,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-11-09 08:34:02,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:02,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088854157] [2021-11-09 08:34:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:02,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:02,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:02,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 08:34:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:34:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:02,373 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 [2021-11-09 08:34:02,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 08:34:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:34:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:02,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:02,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-09 08:34:02,685 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 22 treesize of output 20 [2021-11-09 08:34:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:02,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:02,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088854157] [2021-11-09 08:34:02,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088854157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:34:02,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:02,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-09 08:34:02,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852603225] [2021-11-09 08:34:02,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:34:02,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:34:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:34:02,728 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:03,558 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2021-11-09 08:34:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:34:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:34:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:03,561 INFO L225 Difference]: With dead ends: 63 [2021-11-09 08:34:03,561 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 08:34:03,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:34:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 08:34:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-09 08:34:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-11-09 08:34:03,571 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-11-09 08:34:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:03,572 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-11-09 08:34:03,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-11-09 08:34:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:34:03,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:03,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:03,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:03,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:03,799 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:03,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1649883961, now seen corresponding path program 1 times [2021-11-09 08:34:03,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:03,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529194157] [2021-11-09 08:34:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:03,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:03,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:03,802 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:03,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 08:34:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:34:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:03,936 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 [2021-11-09 08:34:03,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:34:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:04,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-09 08:34:04,131 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 22 treesize of output 20 [2021-11-09 08:34:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:04,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:04,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529194157] [2021-11-09 08:34:04,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529194157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:34:04,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:04,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-09 08:34:04,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010492327] [2021-11-09 08:34:04,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:34:04,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:34:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:34:04,163 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:04,713 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-11-09 08:34:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:34:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 08:34:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:04,720 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:34:04,720 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 08:34:04,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:34:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 08:34:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-09 08:34:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-09 08:34:04,730 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 21 [2021-11-09 08:34:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:04,730 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-09 08:34:04,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-09 08:34:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:34:04,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:04,732 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:04,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-09 08:34:04,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:04,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-11-09 08:34:04,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:04,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525197905] [2021-11-09 08:34:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:34:04,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:04,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:04,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 08:34:05,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:34:05,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:05,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:34:05,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:05,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:05,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:05,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525197905] [2021-11-09 08:34:05,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525197905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:34:05,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:05,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-09 08:34:05,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272753747] [2021-11-09 08:34:05,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:34:05,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:34:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:34:05,908 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-09 08:34:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:07,449 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2021-11-09 08:34:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:34:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 23 [2021-11-09 08:34:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:07,451 INFO L225 Difference]: With dead ends: 91 [2021-11-09 08:34:07,451 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 08:34:07,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:34:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 08:34:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-11-09 08:34:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 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) [2021-11-09 08:34:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-09 08:34:07,463 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 23 [2021-11-09 08:34:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:07,464 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-09 08:34:07,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-09 08:34:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-09 08:34:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:34:07,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:07,466 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:07,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:07,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:07,677 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-11-09 08:34:07,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:07,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077122918] [2021-11-09 08:34:07,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:34:07,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:07,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:07,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:07,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 08:34:07,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:34:07,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:34:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:08,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:08,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:08,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077122918] [2021-11-09 08:34:08,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077122918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:34:08,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:08,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 08:34:08,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828787714] [2021-11-09 08:34:08,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:34:08,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:34:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:34:08,452 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:09,414 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-11-09 08:34:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:34:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:34:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:09,415 INFO L225 Difference]: With dead ends: 81 [2021-11-09 08:34:09,415 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:34:09,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:34:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:34:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-11-09 08:34:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-09 08:34:09,425 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2021-11-09 08:34:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:09,425 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-09 08:34:09,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-09 08:34:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:34:09,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:09,427 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:09,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:09,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:09,635 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-11-09 08:34:09,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:09,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091427033] [2021-11-09 08:34:09,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:09,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:09,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:09,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:09,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 08:34:09,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:09,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:34:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:09,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:34:10,011 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-09 08:34:10,012 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 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-09 08:34:10,027 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 [2021-11-09 08:34:10,084 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 08:34:10,084 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 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 08:34:10,337 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-09 08:34:10,338 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 2 case distinctions, treesize of input 45 treesize of output 50 [2021-11-09 08:34:11,025 INFO L354 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2021-11-09 08:34:11,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 55 [2021-11-09 08:34:11,490 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-09 08:34:11,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-11-09 08:34:11,949 INFO L354 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2021-11-09 08:34:11,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 69 [2021-11-09 08:34:12,413 INFO L354 Elim1Store]: treesize reduction 260, result has 10.3 percent of original size [2021-11-09 08:34:12,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 75 [2021-11-09 08:34:12,781 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-09 08:34:12,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 90 [2021-11-09 08:34:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:12,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:49,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:49,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:34:49,354 INFO L354 Elim1Store]: treesize reduction 618, result has 0.2 percent of original size [2021-11-09 08:34:49,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 29500451086 treesize of output 1 [2021-11-09 08:34:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:49,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:49,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091427033] [2021-11-09 08:34:49,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091427033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:34:49,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:49,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-11-09 08:34:49,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372436710] [2021-11-09 08:34:49,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:34:49,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:34:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1194, Unknown=4, NotChecked=0, Total=1406 [2021-11-09 08:34:49,373 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:03,322 WARN L207 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2021-11-09 08:35:38,875 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse47 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse16 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse17 (bvadd .cse47 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse70 (select .cse16 .cse17))) (let ((.cse35 (not (= .cse70 (_ bv1 32)))) (.cse2 ((_ sign_extend 32) (bvmul c_~N~0 (_ bv6 32)))) (.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse44 (store .cse16 .cse17 (bvadd .cse70 (_ bv5 32)))) (.cse0 (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) c_~N~0))) (and (let ((.cse15 (store .cse16 .cse17 (_ bv1 32)))) (let ((.cse14 (select .cse15 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse13 (store .cse15 c_ULTIMATE.start_main_~a~0.offset (bvadd .cse14 (_ bv5 32))))) (let ((.cse1 (select .cse13 .cse9))) (or .cse0 (not (= .cse1 (_ bv1 32))) (= .cse2 (let ((.cse12 (store .cse13 .cse9 (bvadd .cse1 (_ bv5 32))))) (let ((.cse8 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse12))) (let ((.cse10 (select .cse8 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse11 (bvadd ((_ sign_extend 32) (select .cse12 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse10 .cse6) (select .cse10 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse7 ((_ extract 63 32) .cse11))) (let ((.cse4 (store (store .cse10 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse11)) .cse6 .cse7))) (let ((.cse5 (bvadd (concat .cse7 (select .cse4 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0.base| .cse4) c_ULTIMATE.start_main_~a~0.base) .cse9))))) (let ((.cse3 ((_ extract 63 32) .cse5))) (concat .cse3 (select (store (store .cse4 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse5)) .cse6 .cse3) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (not (bvslt c_ULTIMATE.start_main_~i~0 c_~N~0)) (not (= .cse14 (_ bv1 32)))))))) (exists ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (let ((.cse19 (select |c_#memory_int| ULTIMATE.start_main_~a~0.base))) (let ((.cse18 (select .cse19 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset)))) (let ((.cse21 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|)) (.cse20 (bvadd ((_ sign_extend 32) .cse18) (let ((.cse22 (bvadd ((_ sign_extend 32) (_ bv6 32)) (concat ((_ extract 63 32) (_ bv0 64)) (_ bv0 32))))) (concat ((_ extract 63 32) .cse22) ((_ extract 31 0) .cse22)))))) (and (= .cse18 (_ bv6 32)) (= (_ bv6 32) (select .cse19 ULTIMATE.start_main_~a~0.offset)) (= ((_ extract 63 32) .cse20) (select .cse21 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|))) (= (select .cse21 |c_ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse20)) (not (= ULTIMATE.start_main_~a~0.base |c_ULTIMATE.start_main_~#sum~0.base|))))))) (bvslt (_ bv1 32) c_~N~0) (let ((.cse23 (bvule c_~N~0 (_ bv536870911 32)))) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse23)) (and .cse23 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32))))) (not (bvsle c_~N~0 (_ bv0 32))) (let ((.cse34 (select .cse16 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse32 (store .cse16 c_ULTIMATE.start_main_~a~0.offset (bvadd .cse34 (_ bv5 32))))) (let ((.cse33 (select .cse32 .cse9))) (or (= .cse2 (let ((.cse31 (store .cse32 .cse9 (bvadd .cse33 (_ bv5 32))))) (let ((.cse28 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse31))) (let ((.cse29 (select .cse28 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse30 (bvadd ((_ sign_extend 32) (select .cse31 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse29 .cse6) (select .cse29 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse27 ((_ extract 63 32) .cse30))) (let ((.cse25 (store (store .cse29 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse30)) .cse6 .cse27))) (let ((.cse26 (bvadd (concat .cse27 (select .cse25 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0.base| .cse25) c_ULTIMATE.start_main_~a~0.base) .cse9))))) (let ((.cse24 ((_ extract 63 32) .cse26))) (concat .cse24 (select (store (store .cse25 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse26)) .cse6 .cse24) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (not (= .cse34 (_ bv1 32))) (not (= .cse33 (_ bv1 32))))))) (not (bvslt (_ bv2 32) c_~N~0)) (let ((.cse45 (bvadd (_ bv4 32) .cse47 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse46 (select .cse44 .cse45))) (or .cse35 (= .cse2 (let ((.cse43 (store .cse44 .cse45 (bvadd .cse46 (_ bv5 32))))) (let ((.cse40 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse43))) (let ((.cse41 (select .cse40 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse42 (bvadd ((_ sign_extend 32) (select .cse43 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse41 .cse6) (select .cse41 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse39 ((_ extract 63 32) .cse42))) (let ((.cse37 (store (store .cse41 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse42)) .cse6 .cse39))) (let ((.cse38 (bvadd (concat .cse39 (select .cse37 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse40 |c_ULTIMATE.start_main_~#sum~0.base| .cse37) c_ULTIMATE.start_main_~a~0.base) .cse9))))) (let ((.cse36 ((_ extract 63 32) .cse38))) (concat .cse36 (select (store (store .cse37 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse38)) .cse6 .cse36) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (not (= (_ bv1 32) .cse46))))) (or .cse35 (= .cse2 (let ((.cse51 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse44))) (let ((.cse53 (select .cse51 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse54 (bvadd (concat (select .cse53 .cse6) (select .cse53 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select .cse44 c_ULTIMATE.start_main_~a~0.offset))))) (let ((.cse52 ((_ extract 63 32) .cse54))) (let ((.cse49 (store (store .cse53 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse54)) .cse6 .cse52))) (let ((.cse50 (bvadd ((_ sign_extend 32) (select (select (store .cse51 |c_ULTIMATE.start_main_~#sum~0.base| .cse49) c_ULTIMATE.start_main_~a~0.base) .cse9)) (concat .cse52 (select .cse49 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse48 ((_ extract 63 32) .cse50))) (concat .cse48 (select (store (store .cse49 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse50)) .cse6 .cse48) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (or (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) c_~N~0) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32))) (let ((.cse68 (let ((.cse69 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse69 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (_ bv4 32) .cse69 ULTIMATE.start_main_~a~0.offset) (_ bv1 32))))) (let ((.cse55 (select .cse68 ULTIMATE.start_main_~a~0.offset))) (let ((.cse66 (store .cse68 ULTIMATE.start_main_~a~0.offset (bvadd .cse55 (_ bv5 32)))) (.cse61 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset))) (let ((.cse67 (select .cse66 .cse61))) (or (not (= .cse55 (_ bv1 32))) (= (let ((.cse65 (store .cse66 .cse61 (bvadd .cse67 (_ bv5 32))))) (let ((.cse60 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse65))) (let ((.cse59 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse63 (select .cse60 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse64 (bvadd ((_ sign_extend 32) (select .cse65 ULTIMATE.start_main_~a~0.offset)) (concat (select .cse63 .cse59) (select .cse63 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse62 ((_ extract 63 32) .cse64))) (let ((.cse57 (store (store .cse63 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse64)) .cse59 .cse62))) (let ((.cse58 (bvadd ((_ sign_extend 32) (select (select (store .cse60 |c_ULTIMATE.start_main_~#sum~0.base| .cse57) c_ULTIMATE.start_main_~a~0.base) .cse61)) (concat .cse62 (select .cse57 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse56 ((_ extract 63 32) .cse58))) (concat .cse56 (select (store (store .cse57 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse58)) .cse59 .cse56) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) ((_ sign_extend 32) (bvmul c_~N~0 (_ bv6 32)))) (not (= .cse67 (_ bv1 32))))))))) (not .cse0))))))) is different from true [2021-11-09 08:35:41,407 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse42 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse17 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse18 (bvadd .cse42 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse65 (select .cse17 .cse18))) (let ((.cse0 (bvule c_~N~0 (_ bv536870911 32))) (.cse30 (not (= .cse65 (_ bv1 32)))) (.cse3 ((_ sign_extend 32) (bvmul c_~N~0 (_ bv6 32)))) (.cse10 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (.cse7 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse39 (store .cse17 .cse18 (bvadd .cse65 (_ bv5 32)))) (.cse1 (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) c_~N~0))) (and .cse0 (let ((.cse16 (store .cse17 .cse18 (_ bv1 32)))) (let ((.cse15 (select .cse16 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse14 (store .cse16 c_ULTIMATE.start_main_~a~0.offset (bvadd .cse15 (_ bv5 32))))) (let ((.cse2 (select .cse14 .cse10))) (or .cse1 (not (= .cse2 (_ bv1 32))) (= .cse3 (let ((.cse13 (store .cse14 .cse10 (bvadd .cse2 (_ bv5 32))))) (let ((.cse9 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse13))) (let ((.cse11 (select .cse9 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse12 (bvadd ((_ sign_extend 32) (select .cse13 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse11 .cse7) (select .cse11 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse8 ((_ extract 63 32) .cse12))) (let ((.cse5 (store (store .cse11 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse12)) .cse7 .cse8))) (let ((.cse6 (bvadd (concat .cse8 (select .cse5 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0.base| .cse5) c_ULTIMATE.start_main_~a~0.base) .cse10))))) (let ((.cse4 ((_ extract 63 32) .cse6))) (concat .cse4 (select (store (store .cse5 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse6)) .cse7 .cse4) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (not (bvslt c_ULTIMATE.start_main_~i~0 c_~N~0)) (not (= .cse15 (_ bv1 32)))))))) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse0)) (and .cse0 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)))) (not (bvsle c_~N~0 (_ bv0 32))) (let ((.cse29 (select .cse17 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse27 (store .cse17 c_ULTIMATE.start_main_~a~0.offset (bvadd .cse29 (_ bv5 32))))) (let ((.cse28 (select .cse27 .cse10))) (or (= .cse3 (let ((.cse26 (store .cse27 .cse10 (bvadd .cse28 (_ bv5 32))))) (let ((.cse23 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse26))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse25 (bvadd ((_ sign_extend 32) (select .cse26 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse24 .cse7) (select .cse24 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse22 ((_ extract 63 32) .cse25))) (let ((.cse20 (store (store .cse24 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse25)) .cse7 .cse22))) (let ((.cse21 (bvadd (concat .cse22 (select .cse20 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0.base| .cse20) c_ULTIMATE.start_main_~a~0.base) .cse10))))) (let ((.cse19 ((_ extract 63 32) .cse21))) (concat .cse19 (select (store (store .cse20 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse21)) .cse7 .cse19) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (not (= .cse29 (_ bv1 32))) (not (= .cse28 (_ bv1 32))))))) (let ((.cse40 (bvadd (_ bv4 32) .cse42 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse41 (select .cse39 .cse40))) (or .cse30 (= .cse3 (let ((.cse38 (store .cse39 .cse40 (bvadd .cse41 (_ bv5 32))))) (let ((.cse35 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse38))) (let ((.cse36 (select .cse35 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse37 (bvadd ((_ sign_extend 32) (select .cse38 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse36 .cse7) (select .cse36 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse34 ((_ extract 63 32) .cse37))) (let ((.cse32 (store (store .cse36 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse37)) .cse7 .cse34))) (let ((.cse33 (bvadd (concat .cse34 (select .cse32 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse35 |c_ULTIMATE.start_main_~#sum~0.base| .cse32) c_ULTIMATE.start_main_~a~0.base) .cse10))))) (let ((.cse31 ((_ extract 63 32) .cse33))) (concat .cse31 (select (store (store .cse32 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse33)) .cse7 .cse31) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (not (= (_ bv1 32) .cse41))))) (or .cse30 (= .cse3 (let ((.cse46 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse39))) (let ((.cse48 (select .cse46 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse49 (bvadd (concat (select .cse48 .cse7) (select .cse48 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select .cse39 c_ULTIMATE.start_main_~a~0.offset))))) (let ((.cse47 ((_ extract 63 32) .cse49))) (let ((.cse44 (store (store .cse48 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse49)) .cse7 .cse47))) (let ((.cse45 (bvadd ((_ sign_extend 32) (select (select (store .cse46 |c_ULTIMATE.start_main_~#sum~0.base| .cse44) c_ULTIMATE.start_main_~a~0.base) .cse10)) (concat .cse47 (select .cse44 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse43 ((_ extract 63 32) .cse45))) (concat .cse43 (select (store (store .cse44 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse45)) .cse7 .cse43) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))))) (or (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) c_~N~0) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32))) (let ((.cse63 (let ((.cse64 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse64 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (_ bv4 32) .cse64 ULTIMATE.start_main_~a~0.offset) (_ bv1 32))))) (let ((.cse50 (select .cse63 ULTIMATE.start_main_~a~0.offset))) (let ((.cse61 (store .cse63 ULTIMATE.start_main_~a~0.offset (bvadd .cse50 (_ bv5 32)))) (.cse56 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset))) (let ((.cse62 (select .cse61 .cse56))) (or (not (= .cse50 (_ bv1 32))) (= (let ((.cse60 (store .cse61 .cse56 (bvadd .cse62 (_ bv5 32))))) (let ((.cse55 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse60))) (let ((.cse54 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse58 (select .cse55 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse59 (bvadd ((_ sign_extend 32) (select .cse60 ULTIMATE.start_main_~a~0.offset)) (concat (select .cse58 .cse54) (select .cse58 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse57 ((_ extract 63 32) .cse59))) (let ((.cse52 (store (store .cse58 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse59)) .cse54 .cse57))) (let ((.cse53 (bvadd ((_ sign_extend 32) (select (select (store .cse55 |c_ULTIMATE.start_main_~#sum~0.base| .cse52) c_ULTIMATE.start_main_~a~0.base) .cse56)) (concat .cse57 (select .cse52 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse51 ((_ extract 63 32) .cse53))) (concat .cse51 (select (store (store .cse52 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse53)) .cse54 .cse51) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) ((_ sign_extend 32) (bvmul c_~N~0 (_ bv6 32)))) (not (= .cse62 (_ bv1 32))))))))) (not .cse1))))))) is different from true [2021-11-09 08:36:02,787 WARN L207 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 137 DAG size of output: 61 [2021-11-09 08:36:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:04,725 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-11-09 08:36:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:36:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:36:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:04,729 INFO L225 Difference]: With dead ends: 82 [2021-11-09 08:36:04,729 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 08:36:04,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 82.5s TimeCoverageRelationStatistics Valid=491, Invalid=2815, Unknown=8, NotChecked=226, Total=3540 [2021-11-09 08:36:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 08:36:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-09 08:36:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-09 08:36:04,740 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 29 [2021-11-09 08:36:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:04,741 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-09 08:36:04,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-09 08:36:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:36:04,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:04,743 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:04,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:04,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:04,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:36:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-11-09 08:36:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:04,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252031760] [2021-11-09 08:36:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:04,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:04,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:04,958 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:04,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc10a61-b540-4dda-968e-87483a6e72e6/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 08:36:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:36:05,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:05,296 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 11 treesize of output 9 [2021-11-09 08:36:05,407 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 37 treesize of output 17 [2021-11-09 08:36:05,563 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 08:36:05,563 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 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-09 08:36:05,852 INFO L354 Elim1Store]: treesize reduction 424, result has 8.0 percent of original size [2021-11-09 08:36:05,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 62 [2021-11-09 08:36:12,135 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-09 08:36:12,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 32 [2021-11-09 08:36:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:36:12,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:41,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:36:41,646 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 101628 treesize of output 90854