./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G --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 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:27:43,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:27:43,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:27:43,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:27:43,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:27:43,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:27:43,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:27:43,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:27:43,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:27:43,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:27:43,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:27:43,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:27:43,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:27:43,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:27:43,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:27:43,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:27:43,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:27:43,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:27:43,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:27:43,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:27:43,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:27:43,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:27:43,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:27:43,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:27:43,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:27:43,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:27:43,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:27:43,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:27:43,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:27:43,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:27:43,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:27:43,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:27:43,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:27:43,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:27:43,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:27:43,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:27:43,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:27:43,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:27:43,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:27:43,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:27:43,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:27:43,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:27:43,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:27:43,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:27:43,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:27:43,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:27:43,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:27:43,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:27:43,234 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:27:43,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:27:43,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:27:43,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:27:43,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:27:43,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:27:43,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:27:43,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:27:43,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:27:43,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:27:43,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:27:43,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:27:43,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:27:43,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:27:43,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:27:43,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:27:43,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:27:43,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:27:43,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:27:43,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:27:43,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:27:43,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:27:43,243 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:27:43,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:27:43,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:27:43,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:27:43,247 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_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c [2021-11-23 12:27:43,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:27:43,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:27:43,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:27:43,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:27:43,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:27:43,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-fpi/eqn2.c [2021-11-23 12:27:43,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/data/60ae59616/f22c662c5fc04d9bb7b61b9980ce54b0/FLAGa63a67cb2 [2021-11-23 12:27:44,308 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:27:44,309 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/sv-benchmarks/c/array-fpi/eqn2.c [2021-11-23 12:27:44,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/data/60ae59616/f22c662c5fc04d9bb7b61b9980ce54b0/FLAGa63a67cb2 [2021-11-23 12:27:44,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/data/60ae59616/f22c662c5fc04d9bb7b61b9980ce54b0 [2021-11-23 12:27:44,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:27:44,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:27:44,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:27:44,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:27:44,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:27:44,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:44,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dcdb37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44, skipping insertion in model container [2021-11-23 12:27:44,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:44,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:27:44,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:27:44,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/sv-benchmarks/c/array-fpi/eqn2.c[587,600] [2021-11-23 12:27:44,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:27:44,953 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:27:44,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/sv-benchmarks/c/array-fpi/eqn2.c[587,600] [2021-11-23 12:27:44,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:27:44,988 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:27:44,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44 WrapperNode [2021-11-23 12:27:44,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:27:44,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:27:44,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:27:44,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:27:44,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,058 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-23 12:27:45,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:27:45,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:27:45,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:27:45,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:27:45,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:27:45,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:27:45,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:27:45,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:27:45,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (1/1) ... [2021-11-23 12:27:45,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:27:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:45,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:27:45,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:27:45,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:27:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:27:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:27:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:27:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:27:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:27:45,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:27:45,292 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:27:45,294 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:27:45,513 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:27:45,519 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:27:45,520 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 12:27:45,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:27:45 BoogieIcfgContainer [2021-11-23 12:27:45,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:27:45,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:27:45,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:27:45,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:27:45,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:27:44" (1/3) ... [2021-11-23 12:27:45,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bf4e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:27:45, skipping insertion in model container [2021-11-23 12:27:45,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:27:44" (2/3) ... [2021-11-23 12:27:45,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bf4e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:27:45, skipping insertion in model container [2021-11-23 12:27:45,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:27:45" (3/3) ... [2021-11-23 12:27:45,544 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2.c [2021-11-23 12:27:45,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:27:45,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:27:45,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:27:45,660 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 [2021-11-23 12:27:45,660 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:27:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:27:45,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:45,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:45,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:45,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-23 12:27:45,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:45,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71087153] [2021-11-23 12:27:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:45,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:45,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71087153] [2021-11-23 12:27:45,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71087153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:45,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:45,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:27:45,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670846762] [2021-11-23 12:27:45,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:45,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:27:45,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:27:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:27:46,016 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:46,036 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-23 12:27:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:27:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-23 12:27:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:46,048 INFO L225 Difference]: With dead ends: 38 [2021-11-23 12:27:46,050 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 12:27:46,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:27:46,060 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:46,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:27:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 12:27:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 12:27:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 12:27:46,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-23 12:27:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:46,110 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 12:27:46,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 12:27:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:27:46,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:46,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:46,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:27:46,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-23 12:27:46,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:46,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922398936] [2021-11-23 12:27:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:46,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:46,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:46,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532400142] [2021-11-23 12:27:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:46,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:46,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:46,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:27:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:27:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:46,351 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-23 12:27:46,353 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 27 treesize of output 23 [2021-11-23 12:27:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:46,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:27:46,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922398936] [2021-11-23 12:27:46,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:27:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532400142] [2021-11-23 12:27:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532400142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:46,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:46,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:27:46,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918235399] [2021-11-23 12:27:46,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:46,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:27:46,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:27:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:27:46,509 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:46,607 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-23 12:27:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:27:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-23 12:27:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:46,609 INFO L225 Difference]: With dead ends: 34 [2021-11-23 12:27:46,609 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 12:27:46,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:27:46,612 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:46,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:27:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 12:27:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-23 12:27:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2021-11-23 12:27:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 12:27:46,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-23 12:27:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:46,621 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 12:27:46,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 12:27:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:27:46,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:46,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:46,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:46,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:46,837 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-23 12:27:46,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:46,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660162288] [2021-11-23 12:27:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:46,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:46,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:46,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163298395] [2021-11-23 12:27:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:46,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:46,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:46,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:46,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:27:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:27:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:47,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:27:47,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:47,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660162288] [2021-11-23 12:27:47,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:27:47,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163298395] [2021-11-23 12:27:47,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163298395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:47,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:47,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:27:47,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867046316] [2021-11-23 12:27:47,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:47,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:27:47,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:27:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:27:47,011 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:47,095 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-23 12:27:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:27:47,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:27:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:47,097 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:27:47,097 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:27:47,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:27:47,100 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:47,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:27:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:27:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-23 12:27:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2021-11-23 12:27:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 12:27:47,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-23 12:27:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 12:27:47,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 12:27:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:27:47,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:47,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:47,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 12:27:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:47,333 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-23 12:27:47,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:47,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237797663] [2021-11-23 12:27:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:47,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:47,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:47,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689784176] [2021-11-23 12:27:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:47,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:47,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:47,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:47,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:27:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:47,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:27:47,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:47,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:47,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:47,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237797663] [2021-11-23 12:27:47,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:27:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689784176] [2021-11-23 12:27:47,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689784176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:27:47,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:27:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-23 12:27:47,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025495386] [2021-11-23 12:27:47,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:27:47,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:27:47,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:27:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:27:47,516 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:47,638 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-23 12:27:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:27:47,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:27:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:47,659 INFO L225 Difference]: With dead ends: 44 [2021-11-23 12:27:47,659 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 12:27:47,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:27:47,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:47,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:27:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 12:27:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-11-23 12:27:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-23 12:27:47,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-23 12:27:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:47,668 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-23 12:27:47,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-23 12:27:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:27:47,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:47,669 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:47,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:47,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:47,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-23 12:27:47,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:47,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363181461] [2021-11-23 12:27:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:47,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:47,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:47,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154513237] [2021-11-23 12:27:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:47,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:47,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:47,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:27:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:27:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:48,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:27:48,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363181461] [2021-11-23 12:27:48,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:27:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154513237] [2021-11-23 12:27:48,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154513237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:48,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:48,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:27:48,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025581244] [2021-11-23 12:27:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:48,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:27:48,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:27:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:27:48,151 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:48,266 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-23 12:27:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:27:48,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-23 12:27:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:48,268 INFO L225 Difference]: With dead ends: 41 [2021-11-23 12:27:48,269 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 12:27:48,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:27:48,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:48,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:27:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 12:27:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-23 12:27:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-11-23 12:27:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 12:27:48,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-23 12:27:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:48,277 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 12:27:48,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 12:27:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:27:48,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:48,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:48,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:48,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:48,479 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-23 12:27:48,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:48,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251416577] [2021-11-23 12:27:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:48,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:48,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949235264] [2021-11-23 12:27:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:48,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:48,510 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:27:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:27:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:48,639 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 [2021-11-23 12:27:48,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 12:27:48,716 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 12:27:48,717 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 34 treesize of output 32 [2021-11-23 12:27:48,921 INFO L354 Elim1Store]: treesize reduction 124, result has 16.2 percent of original size [2021-11-23 12:27:48,921 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 51 treesize of output 48 [2021-11-23 12:27:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:49,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:50,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251416577] [2021-11-23 12:27:50,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:27:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949235264] [2021-11-23 12:27:50,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949235264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:27:50,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:27:50,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-23 12:27:50,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821344908] [2021-11-23 12:27:50,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:27:50,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:27:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:27:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:27:50,147 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-11-23 12:27:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:52,307 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-23 12:27:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:27:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 16 [2021-11-23 12:27:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:52,309 INFO L225 Difference]: With dead ends: 74 [2021-11-23 12:27:52,309 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 12:27:52,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2021-11-23 12:27:52,311 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:52,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 108 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 109 Invalid, 0 Unknown, 33 Unchecked, 0.7s Time] [2021-11-23 12:27:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 12:27:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 39. [2021-11-23 12:27:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-23 12:27:52,339 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2021-11-23 12:27:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:52,340 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-23 12:27:52,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2021-11-23 12:27:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-23 12:27:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:27:52,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:52,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:52,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:52,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:52,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2021-11-23 12:27:52,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:52,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042474647] [2021-11-23 12:27:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:52,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:52,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:52,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489880952] [2021-11-23 12:27:52,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:27:52,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:52,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:52,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:27:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:27:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:27:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:27:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:27:52,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:27:52,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042474647] [2021-11-23 12:27:52,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:27:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489880952] [2021-11-23 12:27:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489880952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:27:52,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:27:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 12:27:52,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935166326] [2021-11-23 12:27:52,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:27:52,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:27:52,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:27:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:27:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:27:52,806 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-23 12:27:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:52,931 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-11-23 12:27:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:27:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:27:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:52,932 INFO L225 Difference]: With dead ends: 77 [2021-11-23 12:27:52,933 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 12:27:52,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:27:52,934 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:52,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:27:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 12:27:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-11-23 12:27:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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) [2021-11-23 12:27:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-23 12:27:52,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2021-11-23 12:27:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:52,953 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-23 12:27:52,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-23 12:27:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-23 12:27:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:27:52,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:52,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:52,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:53,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 12:27:53,169 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:27:53,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:53,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-11-23 12:27:53,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:27:53,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020063065] [2021-11-23 12:27:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:53,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:27:53,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:27:53,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327693535] [2021-11-23 12:27:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:27:53,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:53,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:53,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:53,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:27:53,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 12:27:53,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:27:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 12:27:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:53,412 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 [2021-11-23 12:27:53,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 12:27:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,513 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-23 12:27:53,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-11-23 12:27:53,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 12:27:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 55 [2021-11-23 12:27:53,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 60 [2021-11-23 12:27:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 45 [2021-11-23 12:27:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:53,852 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 12:27:53,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-11-23 12:27:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,094 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-23 12:27:54,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 262 treesize of output 508 [2021-11-23 12:27:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 209 [2021-11-23 12:27:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 209 [2021-11-23 12:27:54,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,518 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 12:27:54,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 225 treesize of output 111 [2021-11-23 12:27:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:27:54,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:27:54,682 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-23 12:27:54,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 87 treesize of output 70 [2021-11-23 12:27:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:54,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:28:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:02,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:28:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020063065] [2021-11-23 12:28:02,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:28:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327693535] [2021-11-23 12:28:02,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327693535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:28:02,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:28:02,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-11-23 12:28:02,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297903018] [2021-11-23 12:28:02,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:28:02,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 12:28:02,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:28:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 12:28:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-23 12:28:02,795 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:37,411 WARN L227 SmtUtils]: Spent 32.31s on a formula simplification. DAG size of input: 155 DAG size of output: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:28:40,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 12:29:54,127 WARN L227 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 166 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:31:31,002 WARN L227 SmtUtils]: Spent 1.51m on a formula simplification. DAG size of input: 168 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:31:36,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 12:31:38,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 12:31:41,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 12:31:43,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 12:31:57,065 WARN L227 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 72 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:32:11,844 WARN L227 SmtUtils]: Spent 10.96s on a formula simplification. DAG size of input: 70 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:32:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:15,579 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-11-23 12:32:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 12:32:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:32:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:15,582 INFO L225 Difference]: With dead ends: 120 [2021-11-23 12:32:15,583 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 12:32:15,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 237.1s TimeCoverageRelationStatistics Valid=470, Invalid=1422, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:32:15,585 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 155 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 109 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:15,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 173 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 328 Invalid, 3 Unknown, 45 Unchecked, 21.6s Time] [2021-11-23 12:32:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 12:32:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 51. [2021-11-23 12:32:15,596 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) [2021-11-23 12:32:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-23 12:32:15,597 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2021-11-23 12:32:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-23 12:32:15,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-23 12:32:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:32:15,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:15,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:15,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:15,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:15,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 986773582, now seen corresponding path program 1 times [2021-11-23 12:32:15,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:15,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296619669] [2021-11-23 12:32:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:15,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:15,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:32:15,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821956885] [2021-11-23 12:32:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:15,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:15,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:15,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:32:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:15,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:32:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:32:15,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:32:16,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296619669] [2021-11-23 12:32:16,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:32:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821956885] [2021-11-23 12:32:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821956885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:16,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:32:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 12:32:16,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029276178] [2021-11-23 12:32:16,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:16,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:32:16,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:32:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:32:16,033 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-11-23 12:32:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:16,215 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-11-23 12:32:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 12:32:16,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 22 [2021-11-23 12:32:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:16,217 INFO L225 Difference]: With dead ends: 94 [2021-11-23 12:32:16,217 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 12:32:16,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:32:16,219 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:16,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 12:32:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2021-11-23 12:32:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-23 12:32:16,229 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 22 [2021-11-23 12:32:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:16,229 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-23 12:32:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-11-23 12:32:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-23 12:32:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:32:16,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:16,231 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:16,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:16,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:16,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2021-11-23 12:32:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413122036] [2021-11-23 12:32:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:16,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:16,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:32:16,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977562798] [2021-11-23 12:32:16,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:32:16,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:16,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:16,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:32:16,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:32:16,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:32:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:32:16,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:32:16,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413122036] [2021-11-23 12:32:16,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:32:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977562798] [2021-11-23 12:32:16,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977562798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:16,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:32:16,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-23 12:32:16,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465521206] [2021-11-23 12:32:16,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:16,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 12:32:16,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:32:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:32:16,729 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:16,908 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-11-23 12:32:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:32:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 12:32:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:16,909 INFO L225 Difference]: With dead ends: 87 [2021-11-23 12:32:16,909 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 12:32:16,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:32:16,911 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:16,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 12:32:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-11-23 12:32:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 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) [2021-11-23 12:32:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-23 12:32:16,920 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 24 [2021-11-23 12:32:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:16,920 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-23 12:32:16,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-23 12:32:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:32:16,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:16,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:16,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:17,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 12:32:17,122 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2021-11-23 12:32:17,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022621613] [2021-11-23 12:32:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:17,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:17,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:32:17,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115291362] [2021-11-23 12:32:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:32:17,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:17,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:17,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:17,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_665cd718-bb7b-4f21-bde8-90dacf92accb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:32:17,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:32:17,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:17,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 12:32:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:17,480 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 [2021-11-23 12:32:17,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 12:32:17,665 INFO L354 Elim1Store]: treesize reduction 663, result has 15.8 percent of original size [2021-11-23 12:32:17,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 186 treesize of output 275 [2021-11-23 12:32:17,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 12:32:17,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 12:32:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 74 [2021-11-23 12:32:17,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:32:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 84 [2021-11-23 12:32:17,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:17,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 63 [2021-11-23 12:32:18,221 INFO L354 Elim1Store]: treesize reduction 880, result has 13.6 percent of original size [2021-11-23 12:32:18,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 22 case distinctions, treesize of input 201 treesize of output 294 [2021-11-23 12:32:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 89 [2021-11-23 12:32:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:18,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 61 [2021-11-23 12:32:18,379 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-11-23 12:32:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 134 treesize of output 76 [2021-11-23 12:32:18,542 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-11-23 12:32:18,542 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 70 treesize of output 60 [2021-11-23 12:32:18,932 INFO L354 Elim1Store]: treesize reduction 898, result has 12.1 percent of original size [2021-11-23 12:32:18,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 30 case distinctions, treesize of input 281 treesize of output 522 [2021-11-23 12:32:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:32:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 202 [2021-11-23 12:32:19,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 12:32:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:32:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:32:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 177 [2021-11-23 12:32:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,358 INFO L354 Elim1Store]: treesize reduction 233, result has 1.3 percent of original size [2021-11-23 12:32:19,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 158 [2021-11-23 12:32:19,775 INFO L354 Elim1Store]: treesize reduction 1103, result has 12.0 percent of original size [2021-11-23 12:32:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 37 case distinctions, treesize of input 278 treesize of output 547 [2021-11-23 12:32:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:32:19,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:19,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 154 [2021-11-23 12:32:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:32:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 404 treesize of output 247 [2021-11-23 12:32:20,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:32:20,332 INFO L354 Elim1Store]: treesize reduction 233, result has 1.3 percent of original size [2021-11-23 12:32:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 293 treesize of output 133 [2021-11-23 12:32:20,681 INFO L354 Elim1Store]: treesize reduction 492, result has 10.9 percent of original size [2021-11-23 12:32:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 102 [2021-11-23 12:32:21,110 INFO L354 Elim1Store]: treesize reduction 372, result has 0.3 percent of original size [2021-11-23 12:32:21,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 56 [2021-11-23 12:32:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:21,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:59,646 WARN L227 SmtUtils]: Spent 9.50s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:33:55,958 WARN L227 SmtUtils]: Spent 24.14s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 12:33:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:55,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022621613] [2021-11-23 12:33:55,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:33:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115291362] [2021-11-23 12:33:55,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115291362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:55,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:33:55,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-11-23 12:33:55,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605200023] [2021-11-23 12:33:55,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:55,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 12:33:55,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 12:33:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=560, Unknown=1, NotChecked=0, Total=756 [2021-11-23 12:33:55,978 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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)