./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:43:53,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:43:53,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:43:53,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:43:53,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:43:53,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:43:53,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:43:53,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:43:53,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:43:53,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:43:53,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:43:53,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:43:53,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:43:53,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:43:53,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:43:53,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:43:53,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:43:53,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:43:53,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:43:53,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:43:53,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:43:53,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:43:53,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:43:53,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:43:53,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:43:53,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:43:53,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:43:53,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:43:53,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:43:53,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:43:53,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:43:53,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:43:53,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:43:53,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:43:53,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:43:53,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:43:53,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:43:53,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:43:53,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:43:53,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:43:53,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:43:53,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:43:53,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:43:53,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:43:53,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:43:53,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:43:53,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:43:53,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:43:53,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:43:53,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:43:53,208 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:43:53,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:43:53,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:43:53,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:43:53,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:43:53,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:43:53,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:43:53,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:43:53,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:43:53,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:43:53,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:43:53,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:43:53,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:43:53,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:43:53,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:43:53,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:43:53,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:43:53,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:43:53,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:43:53,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:43:53,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:43:53,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:43:53,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:43:53,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:43:53,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:43:53,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:43:53,213 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_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2021-12-07 00:43:53,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:43:53,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:43:53,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:43:53,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:43:53,418 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:43:53,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-12-07 00:43:53,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/data/d8568956c/01d68bb2bebf4a2994b48450c4cedd74/FLAG274118200 [2021-12-07 00:43:53,846 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:43:53,846 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-12-07 00:43:53,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/data/d8568956c/01d68bb2bebf4a2994b48450c4cedd74/FLAG274118200 [2021-12-07 00:43:53,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/data/d8568956c/01d68bb2bebf4a2994b48450c4cedd74 [2021-12-07 00:43:53,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:43:53,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:43:53,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:43:53,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:43:53,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:43:53,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:43:53" (1/1) ... [2021-12-07 00:43:53,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763de6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:53, skipping insertion in model container [2021-12-07 00:43:53,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:43:53" (1/1) ... [2021-12-07 00:43:53,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:43:53,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:43:53,986 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_cd2d9f36-107c-487b-acc3-eab2149937f6/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-12-07 00:43:54,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:43:54,010 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:43:54,022 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_cd2d9f36-107c-487b-acc3-eab2149937f6/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-12-07 00:43:54,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:43:54,039 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:43:54,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54 WrapperNode [2021-12-07 00:43:54,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:43:54,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:43:54,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:43:54,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:43:54,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,068 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-12-07 00:43:54,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:43:54,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:43:54,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:43:54,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:43:54,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:43:54,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:43:54,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:43:54,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:43:54,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (1/1) ... [2021-12-07 00:43:54,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:43:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:54,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:43:54,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:43:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:43:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:43:54,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:43:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:43:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:43:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:43:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:43:54,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:43:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:43:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:43:54,197 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:43:54,198 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:43:54,308 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:43:54,314 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:43:54,314 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 00:43:54,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:43:54 BoogieIcfgContainer [2021-12-07 00:43:54,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:43:54,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:43:54,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:43:54,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:43:54,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:43:53" (1/3) ... [2021-12-07 00:43:54,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6026c489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:43:54, skipping insertion in model container [2021-12-07 00:43:54,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:54" (2/3) ... [2021-12-07 00:43:54,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6026c489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:43:54, skipping insertion in model container [2021-12-07 00:43:54,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:43:54" (3/3) ... [2021-12-07 00:43:54,322 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2021-12-07 00:43:54,326 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:43:54,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:43:54,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:43:54,369 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 [2021-12-07 00:43:54,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:43:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:43:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 00:43:54,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:54,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:54,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2021-12-07 00:43:54,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:54,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470083986] [2021-12-07 00:43:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:54,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:54,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:54,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:43:54,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470083986] [2021-12-07 00:43:54,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470083986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:54,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:54,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:54,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340632803] [2021-12-07 00:43:54,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:54,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:54,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:54,621 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:43:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:54,655 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-12-07 00:43:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:43:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-07 00:43:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:54,662 INFO L225 Difference]: With dead ends: 64 [2021-12-07 00:43:54,662 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:43:54,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:54,668 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:54,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:43:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-07 00:43:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:43:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-07 00:43:54,697 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2021-12-07 00:43:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:54,699 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-07 00:43:54,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:43:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-07 00:43:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 00:43:54,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:54,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:54,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:43:54,701 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2021-12-07 00:43:54,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:54,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393383838] [2021-12-07 00:43:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:54,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:54,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:43:54,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393383838] [2021-12-07 00:43:54,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393383838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:54,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:54,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:43:54,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111863923] [2021-12-07 00:43:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:54,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:43:54,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:54,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:43:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:54,775 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:54,824 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-12-07 00:43:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-07 00:43:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:54,825 INFO L225 Difference]: With dead ends: 50 [2021-12-07 00:43:54,825 INFO L226 Difference]: Without dead ends: 36 [2021-12-07 00:43:54,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:54,827 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:54,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 71 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-07 00:43:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-07 00:43:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 00:43:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-12-07 00:43:54,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2021-12-07 00:43:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:54,834 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-12-07 00:43:54,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-12-07 00:43:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 00:43:54,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:54,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:54,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:43:54,836 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:54,836 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2021-12-07 00:43:54,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:54,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653081576] [2021-12-07 00:43:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:54,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:55,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:55,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:55,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:43:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:43:55,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653081576] [2021-12-07 00:43:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653081576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508219399] [2021-12-07 00:43:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:55,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:55,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:55,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:55,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:43:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:55,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 00:43:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:55,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:43:55,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:43:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:43:55,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:55,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:43:55,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-07 00:43:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:43:55,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508219399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:55,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2021-12-07 00:43:55,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275538963] [2021-12-07 00:43:55,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:43:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:43:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:43:55,561 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:43:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:55,701 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-07 00:43:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:43:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-12-07 00:43:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:55,703 INFO L225 Difference]: With dead ends: 54 [2021-12-07 00:43:55,703 INFO L226 Difference]: Without dead ends: 50 [2021-12-07 00:43:55,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:43:55,705 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:55,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 161 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 197 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2021-12-07 00:43:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-07 00:43:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-07 00:43:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:43:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-07 00:43:55,715 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2021-12-07 00:43:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:55,715 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-07 00:43:55,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:43:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-07 00:43:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 00:43:55,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:55,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:55,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:43:55,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:55,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:55,919 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2021-12-07 00:43:55,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:55,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858925399] [2021-12-07 00:43:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:55,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:56,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:56,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:56,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:43:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:43:56,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858925399] [2021-12-07 00:43:56,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858925399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662762564] [2021-12-07 00:43:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:56,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:56,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:56,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:43:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:56,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 00:43:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:56,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:43:56,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:43:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:43:56,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:56,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:43:56,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-07 00:43:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:43:56,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662762564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:56,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:56,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2021-12-07 00:43:56,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997784714] [2021-12-07 00:43:56,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:56,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:43:56,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:43:56,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:43:56,575 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:43:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:56,741 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-12-07 00:43:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:43:56,742 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-12-07 00:43:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:56,743 INFO L225 Difference]: With dead ends: 68 [2021-12-07 00:43:56,744 INFO L226 Difference]: Without dead ends: 64 [2021-12-07 00:43:56,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:43:56,746 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:56,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 210 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 265 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-07 00:43:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-07 00:43:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-12-07 00:43:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:43:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-07 00:43:56,755 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2021-12-07 00:43:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-07 00:43:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:43:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-07 00:43:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:43:56,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:56,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:56,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:43:56,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:56,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2021-12-07 00:43:56,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:56,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734871265] [2021-12-07 00:43:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:56,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:43:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 00:43:57,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734871265] [2021-12-07 00:43:57,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734871265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:57,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390115211] [2021-12-07 00:43:57,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:43:57,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:57,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:57,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:57,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:43:57,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:43:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:43:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 00:43:57,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 00:43:57,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390115211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:57,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:57,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-07 00:43:57,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650348059] [2021-12-07 00:43:57,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:57,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:43:57,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:43:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:43:57,293 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 00:43:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:57,372 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-12-07 00:43:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:43:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-12-07 00:43:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:57,373 INFO L225 Difference]: With dead ends: 88 [2021-12-07 00:43:57,373 INFO L226 Difference]: Without dead ends: 69 [2021-12-07 00:43:57,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:43:57,375 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:57,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 103 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-07 00:43:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-12-07 00:43:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:43:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-07 00:43:57,384 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2021-12-07 00:43:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:57,384 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-07 00:43:57,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 00:43:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-07 00:43:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 00:43:57,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:57,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:57,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:43:57,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:57,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2021-12-07 00:43:57,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:57,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462743324] [2021-12-07 00:43:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:57,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:43:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:43:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:43:57,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:57,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462743324] [2021-12-07 00:43:57,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462743324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003899399] [2021-12-07 00:43:57,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:43:57,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:57,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:57,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:43:57,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:43:57,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:43:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:43:57,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:43:57,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003899399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:57,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:57,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-07 00:43:57,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908676979] [2021-12-07 00:43:57,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:57,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:43:57,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:43:57,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:43:57,913 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:43:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:57,985 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-12-07 00:43:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:43:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2021-12-07 00:43:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:57,986 INFO L225 Difference]: With dead ends: 59 [2021-12-07 00:43:57,987 INFO L226 Difference]: Without dead ends: 51 [2021-12-07 00:43:57,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:43:57,988 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:57,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 123 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-07 00:43:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-12-07 00:43:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:43:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-12-07 00:43:57,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2021-12-07 00:43:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:57,995 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-07 00:43:57,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:43:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-12-07 00:43:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 00:43:57,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:57,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:58,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:43:58,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:58,199 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2021-12-07 00:43:58,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:58,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641735713] [2021-12-07 00:43:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:58,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:58,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:43:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:58,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:43:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:43:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:43:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:43:58,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641735713] [2021-12-07 00:43:58,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641735713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166931542] [2021-12-07 00:43:58,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:43:58,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:58,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:58,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:43:59,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:43:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:59,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 00:43:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:59,052 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 [2021-12-07 00:43:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:59,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:43:59,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-12-07 00:43:59,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:59,468 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 0 case distinctions, treesize of input 42 treesize of output 39 [2021-12-07 00:43:59,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-12-07 00:43:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:43:59,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:14,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166931542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:14,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:44:14,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-12-07 00:44:14,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057119096] [2021-12-07 00:44:14,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:14,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:44:14,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:44:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1806, Unknown=6, NotChecked=0, Total=1980 [2021-12-07 00:44:14,479 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:16,645 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2021-12-07 00:44:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-07 00:44:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-07 00:44:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:16,647 INFO L225 Difference]: With dead ends: 99 [2021-12-07 00:44:16,647 INFO L226 Difference]: Without dead ends: 93 [2021-12-07 00:44:16,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=631, Invalid=4913, Unknown=6, NotChecked=0, Total=5550 [2021-12-07 00:44:16,649 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 95 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:16,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 339 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 778 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2021-12-07 00:44:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-07 00:44:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2021-12-07 00:44:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:44:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2021-12-07 00:44:16,660 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2021-12-07 00:44:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:16,661 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2021-12-07 00:44:16,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2021-12-07 00:44:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 00:44:16,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:16,662 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:16,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:44:16,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:16,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2021-12-07 00:44:16,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:16,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795826569] [2021-12-07 00:44:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:16,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:17,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:44:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:17,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:44:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:44:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:17,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:44:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:17,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:17,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795826569] [2021-12-07 00:44:17,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795826569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:17,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955216772] [2021-12-07 00:44:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:17,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:17,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:44:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 00:44:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:17,624 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 [2021-12-07 00:44:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:44:17,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-07 00:44:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:18,039 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 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-07 00:44:18,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2021-12-07 00:44:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:18,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:27,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955216772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:27,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:44:27,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2021-12-07 00:44:27,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999841015] [2021-12-07 00:44:27,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:27,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:44:27,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:44:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1877, Unknown=4, NotChecked=0, Total=2070 [2021-12-07 00:44:27,083 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:28,694 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2021-12-07 00:44:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:44:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-07 00:44:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:28,695 INFO L225 Difference]: With dead ends: 112 [2021-12-07 00:44:28,695 INFO L226 Difference]: Without dead ends: 108 [2021-12-07 00:44:28,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=569, Invalid=3983, Unknown=4, NotChecked=0, Total=4556 [2021-12-07 00:44:28,697 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 434 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 967 Invalid, 0 Unknown, 118 Unchecked, 0.5s Time] [2021-12-07 00:44:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-07 00:44:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2021-12-07 00:44:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:44:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2021-12-07 00:44:28,707 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2021-12-07 00:44:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:28,707 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2021-12-07 00:44:28,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2021-12-07 00:44:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 00:44:28,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:28,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:28,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-07 00:44:28,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:28,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2021-12-07 00:44:28,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:28,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733906591] [2021-12-07 00:44:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:28,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:29,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:44:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:29,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:44:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:44:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:44:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:29,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733906591] [2021-12-07 00:44:29,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733906591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917318258] [2021-12-07 00:44:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:44:29,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:29,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:29,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:44:29,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:44:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 00:44:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:29,572 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 [2021-12-07 00:44:29,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:29,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:29,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:44:29,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-12-07 00:44:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:29,997 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 0 case distinctions, treesize of input 42 treesize of output 39 [2021-12-07 00:44:30,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-12-07 00:44:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:30,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:39,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917318258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:39,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:44:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-12-07 00:44:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631877518] [2021-12-07 00:44:39,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:39,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:44:39,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:44:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1872, Unknown=4, NotChecked=0, Total=2070 [2021-12-07 00:44:39,234 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:40,868 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2021-12-07 00:44:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:44:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-07 00:44:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:40,870 INFO L225 Difference]: With dead ends: 150 [2021-12-07 00:44:40,870 INFO L226 Difference]: Without dead ends: 146 [2021-12-07 00:44:40,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=544, Invalid=4144, Unknown=4, NotChecked=0, Total=4692 [2021-12-07 00:44:40,872 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 64 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:40,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 310 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 656 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2021-12-07 00:44:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-07 00:44:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 72. [2021-12-07 00:44:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2021-12-07 00:44:40,881 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2021-12-07 00:44:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:40,881 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2021-12-07 00:44:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2021-12-07 00:44:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 00:44:40,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:40,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:40,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:44:41,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:44:41,084 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2021-12-07 00:44:41,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:41,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505549950] [2021-12-07 00:44:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:41,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:41,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:44:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:44:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:41,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:44:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:41,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:44:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:41,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505549950] [2021-12-07 00:44:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505549950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625539957] [2021-12-07 00:44:41,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:44:41,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:41,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:41,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:41,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:44:41,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:44:41,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 00:44:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:41,964 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 [2021-12-07 00:44:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:42,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:44:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-07 00:44:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:42,430 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 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-07 00:44:42,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2021-12-07 00:44:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:42,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:53,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625539957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:53,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:44:53,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2021-12-07 00:44:53,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670181266] [2021-12-07 00:44:53,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:53,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:44:53,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:44:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1982, Unknown=5, NotChecked=0, Total=2162 [2021-12-07 00:44:53,636 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:55,491 INFO L93 Difference]: Finished difference Result 145 states and 187 transitions. [2021-12-07 00:44:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:44:55,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-07 00:44:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:55,492 INFO L225 Difference]: With dead ends: 145 [2021-12-07 00:44:55,492 INFO L226 Difference]: Without dead ends: 141 [2021-12-07 00:44:55,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=576, Invalid=4531, Unknown=5, NotChecked=0, Total=5112 [2021-12-07 00:44:55,495 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:55,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 432 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 870 Invalid, 0 Unknown, 191 Unchecked, 0.5s Time] [2021-12-07 00:44:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-07 00:44:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-12-07 00:44:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:44:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2021-12-07 00:44:55,502 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 50 [2021-12-07 00:44:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:55,502 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2021-12-07 00:44:55,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-07 00:44:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2021-12-07 00:44:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-07 00:44:55,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:55,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:55,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:44:55,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:44:55,705 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:55,706 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2021-12-07 00:44:55,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:55,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620533972] [2021-12-07 00:44:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:55,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:55,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:44:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:55,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:44:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:55,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:44:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:55,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:44:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:44:55,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620533972] [2021-12-07 00:44:55,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620533972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952265944] [2021-12-07 00:44:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:44:55,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:55,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:44:55,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 00:44:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:44:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:44:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:44:55,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952265944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:44:55,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:44:55,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-07 00:44:55,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115187407] [2021-12-07 00:44:55,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:55,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:44:55,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:55,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:44:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:44:55,983 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:44:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:56,075 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2021-12-07 00:44:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:44:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2021-12-07 00:44:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:56,076 INFO L225 Difference]: With dead ends: 121 [2021-12-07 00:44:56,076 INFO L226 Difference]: Without dead ends: 85 [2021-12-07 00:44:56,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:44:56,077 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 90 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:56,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 102 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:44:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-07 00:44:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-12-07 00:44:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 00:44:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-12-07 00:44:56,085 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 52 [2021-12-07 00:44:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:56,085 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-12-07 00:44:56,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-07 00:44:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-12-07 00:44:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 00:44:56,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:56,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:56,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:44:56,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:44:56,287 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2021-12-07 00:44:56,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:56,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520478853] [2021-12-07 00:44:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:56,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:44:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:44:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:44:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:44:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:44:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 00:44:56,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:56,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520478853] [2021-12-07 00:44:56,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520478853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:56,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662358453] [2021-12-07 00:44:56,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:44:56,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:56,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:56,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:56,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:44:56,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:44:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:44:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 00:44:56,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 00:44:56,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662358453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:44:56,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:44:56,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-07 00:44:56,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708484762] [2021-12-07 00:44:56,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:56,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:44:56,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:44:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:44:56,599 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:44:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:56,719 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-12-07 00:44:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:44:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2021-12-07 00:44:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:56,720 INFO L225 Difference]: With dead ends: 73 [2021-12-07 00:44:56,720 INFO L226 Difference]: Without dead ends: 63 [2021-12-07 00:44:56,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:44:56,720 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:56,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 135 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:44:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-07 00:44:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2021-12-07 00:44:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-07 00:44:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-07 00:44:56,725 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2021-12-07 00:44:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:56,725 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-07 00:44:56,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:44:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-07 00:44:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:44:56,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:56,726 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:56,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:44:56,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:56,927 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2021-12-07 00:44:56,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:56,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809279283] [2021-12-07 00:44:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:56,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:44:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:44:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:44:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:44:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:44:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:44:58,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809279283] [2021-12-07 00:44:58,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809279283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046879440] [2021-12-07 00:44:58,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:44:58,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:58,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:58,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:58,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:44:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:44:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:58,194 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 [2021-12-07 00:44:58,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:58,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:58,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:58,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:44:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-12-07 00:44:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:44:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2021-12-07 00:44:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:44:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2021-12-07 00:44:59,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2021-12-07 00:44:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:44:59,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:45:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046879440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:45:15,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:45:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2021-12-07 00:45:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289820177] [2021-12-07 00:45:15,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:45:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-07 00:45:15,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:45:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-07 00:45:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3836, Unknown=6, NotChecked=0, Total=4160 [2021-12-07 00:45:15,423 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:45:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:45:17,874 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2021-12-07 00:45:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 00:45:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:45:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:45:17,875 INFO L225 Difference]: With dead ends: 109 [2021-12-07 00:45:17,875 INFO L226 Difference]: Without dead ends: 105 [2021-12-07 00:45:17,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=650, Invalid=6826, Unknown=6, NotChecked=0, Total=7482 [2021-12-07 00:45:17,878 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:45:17,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 472 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1106 Invalid, 0 Unknown, 248 Unchecked, 0.7s Time] [2021-12-07 00:45:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-07 00:45:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2021-12-07 00:45:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 00:45:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2021-12-07 00:45:17,886 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 64 [2021-12-07 00:45:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:45:17,886 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2021-12-07 00:45:17,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 51 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:45:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2021-12-07 00:45:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:45:17,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:45:17,887 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:45:17,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:45:18,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:45:18,088 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:45:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:45:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2021-12-07 00:45:18,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:45:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518220081] [2021-12-07 00:45:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:45:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:45:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:45:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:45:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:45:19,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:45:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:45:19,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:45:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:45:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:45:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:45:19,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:45:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:45:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:45:19,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:45:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518220081] [2021-12-07 00:45:19,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518220081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:45:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137646624] [2021-12-07 00:45:19,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:45:19,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:45:19,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:45:19,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:45:19,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:45:19,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 00:45:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:45:19,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 00:45:19,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:45:19,114 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 [2021-12-07 00:45:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:19,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:19,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:19,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:45:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2021-12-07 00:45:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2021-12-07 00:45:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:20,424 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-12-07 00:45:20,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 103 [2021-12-07 00:45:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:45:21,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:45:21,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:45:21,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 70 [2021-12-07 00:45:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:45:22,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:45:25,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= |c_ULTIMATE.start_main_~N~0#1| |ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse0 (* |ULTIMATE.start_main_~i~0#1| 4))) (or (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_143|) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (< (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse0))) (<= 0 (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse0) v_ArrVal_257))) (+ (select .cse1 |c_ULTIMATE.start_main_~#b~0#1.offset|) |c_ULTIMATE.start_main_~k~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| 1 (select .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))))))))))) is different from false [2021-12-07 00:45:27,469 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (v_ArrVal_254 Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse0) v_ArrVal_254)) (.cse2 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_148|) (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_143|) (< (+ v_ArrVal_254 |c_ULTIMATE.start_main_~j~0#1|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse0))) (< (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse1) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse2))) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= 0 (let ((.cse3 (store .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2) v_ArrVal_257))) (+ (select .cse3 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|) |c_ULTIMATE.start_main_~k~0#1| (select .cse3 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| 1))) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|))))) is different from false [2021-12-07 00:46:58,841 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (v_ArrVal_254 Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int) (v_ArrVal_252 Int)) (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1) v_ArrVal_252))) (let ((.cse2 (store .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1 4) v_ArrVal_254)) (.cse3 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (< (+ v_ArrVal_254 |c_ULTIMATE.start_main_~j~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse0) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse1 4))) (< (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse2) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse3))) (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_148|) (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_143|) (< (+ v_ArrVal_252 |c_ULTIMATE.start_main_~j~0#1|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse1))) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= 0 (let ((.cse4 (store .cse2 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse3) v_ArrVal_257))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) (select .cse4 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) |c_ULTIMATE.start_main_~k~0#1| (select .cse4 |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_~i~0#1_143| 1)))))))) is different from false [2021-12-07 00:47:15,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137646624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:47:15,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:47:15,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 54 [2021-12-07 00:47:15,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771980900] [2021-12-07 00:47:15,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:47:15,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-07 00:47:15,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:47:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-07 00:47:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=4215, Unknown=48, NotChecked=408, Total=5112 [2021-12-07 00:47:15,401 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 54 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:47:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:47:24,377 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2021-12-07 00:47:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 00:47:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:47:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:47:24,379 INFO L225 Difference]: With dead ends: 131 [2021-12-07 00:47:24,379 INFO L226 Difference]: Without dead ends: 127 [2021-12-07 00:47:24,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2784 ImplicationChecksByTransitivity, 121.5s TimeCoverageRelationStatistics Valid=909, Invalid=7794, Unknown=51, NotChecked=558, Total=9312 [2021-12-07 00:47:24,382 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:47:24,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 588 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 859 Invalid, 0 Unknown, 535 Unchecked, 0.6s Time] [2021-12-07 00:47:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-07 00:47:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2021-12-07 00:47:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 00:47:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-12-07 00:47:24,392 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 64 [2021-12-07 00:47:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:47:24,392 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-12-07 00:47:24,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:47:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-12-07 00:47:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:47:24,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:47:24,393 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:47:24,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:47:24,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:47:24,595 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:47:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:47:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2021-12-07 00:47:24,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:47:24,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630073352] [2021-12-07 00:47:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:47:24,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:47:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:25,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:47:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:25,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:47:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:25,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:47:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:47:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:47:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:47:25,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:47:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630073352] [2021-12-07 00:47:25,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630073352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:47:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549161855] [2021-12-07 00:47:25,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:47:25,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:47:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:47:25,666 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:47:25,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:47:25,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:47:25,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:47:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 00:47:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:47:25,749 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 18 treesize of output 16 [2021-12-07 00:47:26,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:47:26,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-12-07 00:47:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:47:26,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2021-12-07 00:47:26,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2021-12-07 00:47:27,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2021-12-07 00:47:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:47:27,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:47:43,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549161855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:47:43,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:47:43,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 50 [2021-12-07 00:47:43,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101266544] [2021-12-07 00:47:43,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:47:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 00:47:43,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:47:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 00:47:43,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3721, Unknown=6, NotChecked=0, Total=4032 [2021-12-07 00:47:43,061 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:47:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:47:47,223 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2021-12-07 00:47:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-07 00:47:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:47:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:47:47,224 INFO L225 Difference]: With dead ends: 155 [2021-12-07 00:47:47,225 INFO L226 Difference]: Without dead ends: 151 [2021-12-07 00:47:47,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=960, Invalid=9336, Unknown=6, NotChecked=0, Total=10302 [2021-12-07 00:47:47,226 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 123 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:47:47,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 441 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1529 Invalid, 0 Unknown, 338 Unchecked, 1.0s Time] [2021-12-07 00:47:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-07 00:47:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 98. [2021-12-07 00:47:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 85 states have internal predecessors, (109), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-07 00:47:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2021-12-07 00:47:47,237 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 64 [2021-12-07 00:47:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:47:47,237 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2021-12-07 00:47:47,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:47:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2021-12-07 00:47:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:47:47,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:47:47,238 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:47:47,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-07 00:47:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:47:47,440 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:47:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:47:47,441 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2021-12-07 00:47:47,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:47:47,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765783599] [2021-12-07 00:47:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:47:47,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:47:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:48,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:47:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:47:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:47:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:48,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:47:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:47:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:47:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:47:48,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:47:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765783599] [2021-12-07 00:47:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765783599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:47:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88761773] [2021-12-07 00:47:48,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:47:48,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:47:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:47:48,448 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:47:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:47:48,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 00:47:48,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:47:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-07 00:47:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:47:48,544 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 18 treesize of output 16 [2021-12-07 00:47:49,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:47:49,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-12-07 00:47:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:47:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2021-12-07 00:47:49,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2021-12-07 00:47:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2021-12-07 00:47:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:47:50,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:07,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88761773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:07,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:07,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 50 [2021-12-07 00:48:07,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749293590] [2021-12-07 00:48:07,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:07,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 00:48:07,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 00:48:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3726, Unknown=7, NotChecked=0, Total=4032 [2021-12-07 00:48:07,574 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:48:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:10,162 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2021-12-07 00:48:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:48:10,162 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:48:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:10,163 INFO L225 Difference]: With dead ends: 125 [2021-12-07 00:48:10,163 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 00:48:10,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=626, Invalid=6339, Unknown=7, NotChecked=0, Total=6972 [2021-12-07 00:48:10,164 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:10,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 479 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1402 Invalid, 0 Unknown, 258 Unchecked, 0.8s Time] [2021-12-07 00:48:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 00:48:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-12-07 00:48:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:48:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-12-07 00:48:10,175 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 64 [2021-12-07 00:48:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:10,175 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-12-07 00:48:10,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:48:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-12-07 00:48:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:48:10,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:10,176 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:10,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:48:10,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:48:10,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2021-12-07 00:48:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:10,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380780462] [2021-12-07 00:48:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:10,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:11,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:48:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:11,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:48:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:11,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:48:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:48:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:11,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:48:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:48:11,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380780462] [2021-12-07 00:48:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380780462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089544414] [2021-12-07 00:48:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:48:11,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:11,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:11,452 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:11,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:48:11,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:48:11,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-07 00:48:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:11,544 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 [2021-12-07 00:48:17,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:48:17,942 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-12-07 00:48:17,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 60 [2021-12-07 00:48:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,184 INFO L354 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2021-12-07 00:48:18,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 79 [2021-12-07 00:48:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,473 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-12-07 00:48:18,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 99 [2021-12-07 00:48:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:48:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:48:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:48:20,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:48:20,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 8 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 73 [2021-12-07 00:48:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:48:20,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:25,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089544414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:25,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:25,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 58 [2021-12-07 00:48:25,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463237777] [2021-12-07 00:48:25,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:25,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-07 00:48:25,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-07 00:48:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=5308, Unknown=3, NotChecked=0, Total=6006 [2021-12-07 00:48:25,373 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:48:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:45,063 INFO L93 Difference]: Finished difference Result 246 states and 318 transitions. [2021-12-07 00:48:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-07 00:48:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:48:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:45,065 INFO L225 Difference]: With dead ends: 246 [2021-12-07 00:48:45,065 INFO L226 Difference]: Without dead ends: 240 [2021-12-07 00:48:45,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=1604, Invalid=12905, Unknown=11, NotChecked=0, Total=14520 [2021-12-07 00:48:45,068 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 96 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:45,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 547 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 962 Invalid, 0 Unknown, 247 Unchecked, 0.6s Time] [2021-12-07 00:48:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-07 00:48:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 142. [2021-12-07 00:48:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 124 states have (on average 1.3225806451612903) internal successors, (164), 124 states have internal predecessors, (164), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 00:48:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2021-12-07 00:48:45,095 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 64 [2021-12-07 00:48:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:45,096 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2021-12-07 00:48:45,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:48:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2021-12-07 00:48:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:48:45,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:45,097 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:45,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:48:45,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:48:45,298 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2021-12-07 00:48:45,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:45,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063419327] [2021-12-07 00:48:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:45,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:48:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:48:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:48:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:48:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:48:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:48:46,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063419327] [2021-12-07 00:48:46,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063419327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925174421] [2021-12-07 00:48:46,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:48:46,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:46,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:46,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:48:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 00:48:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:46,541 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 [2021-12-07 00:48:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:48:47,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-07 00:48:47,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:48:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2021-12-07 00:48:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:47,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 73 [2021-12-07 00:48:48,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 37 [2021-12-07 00:48:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:48:48,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:59,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925174421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:59,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:59,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 52 [2021-12-07 00:48:59,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147448404] [2021-12-07 00:48:59,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:59,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:48:59,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:48:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3973, Unknown=4, NotChecked=0, Total=4290 [2021-12-07 00:48:59,912 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:49:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:03,670 INFO L93 Difference]: Finished difference Result 242 states and 306 transitions. [2021-12-07 00:49:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-07 00:49:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:49:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:03,672 INFO L225 Difference]: With dead ends: 242 [2021-12-07 00:49:03,672 INFO L226 Difference]: Without dead ends: 238 [2021-12-07 00:49:03,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=729, Invalid=8773, Unknown=4, NotChecked=0, Total=9506 [2021-12-07 00:49:03,673 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 69 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:03,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 750 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1713 Invalid, 0 Unknown, 245 Unchecked, 1.1s Time] [2021-12-07 00:49:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-07 00:49:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 146. [2021-12-07 00:49:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 126 states have (on average 1.3174603174603174) internal successors, (166), 127 states have internal predecessors, (166), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 00:49:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 196 transitions. [2021-12-07 00:49:03,693 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 196 transitions. Word has length 64 [2021-12-07 00:49:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:03,693 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 196 transitions. [2021-12-07 00:49:03,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:49:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 196 transitions. [2021-12-07 00:49:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:49:03,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:03,694 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:03,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:49:03,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:03,896 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2021-12-07 00:49:03,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:03,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069876158] [2021-12-07 00:49:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:03,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:49:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:49:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:05,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:49:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:05,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:49:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:05,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:49:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:49:05,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069876158] [2021-12-07 00:49:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069876158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122246125] [2021-12-07 00:49:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:49:05,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:05,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:05,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:49:05,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:49:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:49:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:05,171 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 [2021-12-07 00:49:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:49:05,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-12-07 00:49:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:49:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:05,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2021-12-07 00:49:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:06,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2021-12-07 00:49:06,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2021-12-07 00:49:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:49:06,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:23,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122246125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:23,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:23,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 52 [2021-12-07 00:49:23,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632513534] [2021-12-07 00:49:23,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:23,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:49:23,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:49:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3967, Unknown=6, NotChecked=0, Total=4290 [2021-12-07 00:49:23,302 INFO L87 Difference]: Start difference. First operand 146 states and 196 transitions. Second operand has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:49:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:26,087 INFO L93 Difference]: Finished difference Result 221 states and 295 transitions. [2021-12-07 00:49:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 00:49:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:49:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:26,089 INFO L225 Difference]: With dead ends: 221 [2021-12-07 00:49:26,089 INFO L226 Difference]: Without dead ends: 217 [2021-12-07 00:49:26,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2315 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=691, Invalid=6785, Unknown=6, NotChecked=0, Total=7482 [2021-12-07 00:49:26,090 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 89 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:26,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 336 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1268 Invalid, 0 Unknown, 312 Unchecked, 0.9s Time] [2021-12-07 00:49:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-07 00:49:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 162. [2021-12-07 00:49:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 139 states have (on average 1.3453237410071943) internal successors, (187), 140 states have internal predecessors, (187), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 00:49:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 223 transitions. [2021-12-07 00:49:26,112 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 223 transitions. Word has length 64 [2021-12-07 00:49:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:26,112 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 223 transitions. [2021-12-07 00:49:26,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:49:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 223 transitions. [2021-12-07 00:49:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-07 00:49:26,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:26,113 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:26,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:49:26,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:26,315 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2021-12-07 00:49:26,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:26,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019003531] [2021-12-07 00:49:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:26,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:27,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:49:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:27,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:49:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:27,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:49:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:27,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:49:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:49:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:49:27,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019003531] [2021-12-07 00:49:27,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019003531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:27,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364378700] [2021-12-07 00:49:27,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:49:27,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:27,446 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:27,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:49:27,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 00:49:27,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 00:49:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:27,537 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 [2021-12-07 00:49:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:49:28,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-12-07 00:49:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2021-12-07 00:49:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:28,631 INFO L354 Elim1Store]: treesize reduction 72, result has 28.7 percent of original size [2021-12-07 00:49:28,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 111 [2021-12-07 00:49:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:49:30,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:49:30,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:49:30,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 48 [2021-12-07 00:49:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:49:30,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:09,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364378700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:09,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:09,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 56 [2021-12-07 00:51:09,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867504902] [2021-12-07 00:51:09,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:09,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 00:51:09,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 00:51:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=4841, Unknown=35, NotChecked=0, Total=5550 [2021-12-07 00:51:09,915 INFO L87 Difference]: Start difference. First operand 162 states and 223 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:51:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:13,385 INFO L93 Difference]: Finished difference Result 224 states and 300 transitions. [2021-12-07 00:51:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-07 00:51:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-07 00:51:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:13,386 INFO L225 Difference]: With dead ends: 224 [2021-12-07 00:51:13,387 INFO L226 Difference]: Without dead ends: 218 [2021-12-07 00:51:13,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 102.0s TimeCoverageRelationStatistics Valid=1175, Invalid=8296, Unknown=35, NotChecked=0, Total=9506 [2021-12-07 00:51:13,388 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 68 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:13,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 399 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1349 Invalid, 0 Unknown, 379 Unchecked, 0.9s Time] [2021-12-07 00:51:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-07 00:51:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-12-07 00:51:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 159 states have (on average 1.3396226415094339) internal successors, (213), 160 states have internal predecessors, (213), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-07 00:51:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 251 transitions. [2021-12-07 00:51:13,414 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 251 transitions. Word has length 64 [2021-12-07 00:51:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:13,414 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 251 transitions. [2021-12-07 00:51:13,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:51:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 251 transitions. [2021-12-07 00:51:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 00:51:13,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:13,415 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:13,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:51:13,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:13,617 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash -584834725, now seen corresponding path program 8 times [2021-12-07 00:51:13,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:51:13,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425952001] [2021-12-07 00:51:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:13,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:51:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:51:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:13,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:51:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:13,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:51:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:13,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:51:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:13,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:51:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 00:51:13,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:51:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425952001] [2021-12-07 00:51:13,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425952001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591494004] [2021-12-07 00:51:13,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:51:13,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:51:13,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:51:13,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:51:13,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:51:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:51:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 00:51:13,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 00:51:14,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591494004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:14,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:51:14,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-07 00:51:14,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284253122] [2021-12-07 00:51:14,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:14,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:51:14,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:51:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:51:14,012 INFO L87 Difference]: Start difference. First operand 183 states and 251 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:51:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:14,205 INFO L93 Difference]: Finished difference Result 304 states and 397 transitions. [2021-12-07 00:51:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:51:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2021-12-07 00:51:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:14,207 INFO L225 Difference]: With dead ends: 304 [2021-12-07 00:51:14,207 INFO L226 Difference]: Without dead ends: 239 [2021-12-07 00:51:14,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:51:14,207 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:14,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 134 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:51:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-07 00:51:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 190. [2021-12-07 00:51:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 166 states have (on average 1.2951807228915662) internal successors, (215), 166 states have internal predecessors, (215), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-07 00:51:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 253 transitions. [2021-12-07 00:51:14,238 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 253 transitions. Word has length 66 [2021-12-07 00:51:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:14,239 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 253 transitions. [2021-12-07 00:51:14,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 00:51:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 253 transitions. [2021-12-07 00:51:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 00:51:14,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:14,240 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:14,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:51:14,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:14,441 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1107280848, now seen corresponding path program 9 times [2021-12-07 00:51:14,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:51:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989021662] [2021-12-07 00:51:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:14,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:51:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:51:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:51:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:51:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:51:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:51:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:51:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:51:14,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:51:14,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989021662] [2021-12-07 00:51:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989021662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:14,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619148248] [2021-12-07 00:51:14,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:51:14,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:51:14,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:51:14,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:51:14,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:51:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:51:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:51:14,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 00:51:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619148248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:14,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:51:14,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-07 00:51:14,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997717557] [2021-12-07 00:51:14,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:14,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:51:14,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:51:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:51:14,866 INFO L87 Difference]: Start difference. First operand 190 states and 253 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-07 00:51:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:15,061 INFO L93 Difference]: Finished difference Result 204 states and 267 transitions. [2021-12-07 00:51:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:51:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2021-12-07 00:51:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:15,063 INFO L225 Difference]: With dead ends: 204 [2021-12-07 00:51:15,063 INFO L226 Difference]: Without dead ends: 192 [2021-12-07 00:51:15,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:51:15,064 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:15,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 127 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:51:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-07 00:51:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 77. [2021-12-07 00:51:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 00:51:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-12-07 00:51:15,081 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 74 [2021-12-07 00:51:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:15,081 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-12-07 00:51:15,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-07 00:51:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-12-07 00:51:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 00:51:15,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:15,082 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:15,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 00:51:15,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:15,284 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -517304264, now seen corresponding path program 9 times [2021-12-07 00:51:15,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:51:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129024144] [2021-12-07 00:51:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:51:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:51:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:51:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:51:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:51:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:51:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:51:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:51:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:51:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:51:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:51:17,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129024144] [2021-12-07 00:51:17,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129024144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:51:17,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043065599] [2021-12-07 00:51:17,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:51:17,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:51:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:51:17,045 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:51:17,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:51:17,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:51:17,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 00:51:17,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:17,154 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 [2021-12-07 00:51:53,895 INFO L354 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2021-12-07 00:51:53,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 87 [2021-12-07 00:51:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:51:54,226 INFO L354 Elim1Store]: treesize reduction 225, result has 0.4 percent of original size [2021-12-07 00:51:54,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 102 [2021-12-07 00:51:54,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:51:54,578 INFO L354 Elim1Store]: treesize reduction 360, result has 7.5 percent of original size [2021-12-07 00:51:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 132 treesize of output 141 [2021-12-07 00:51:55,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:51:55,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:51:55,154 INFO L354 Elim1Store]: treesize reduction 504, result has 5.4 percent of original size [2021-12-07 00:51:55,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 32 case distinctions, treesize of input 176 treesize of output 167 [2021-12-07 00:52:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:52:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:52:02,535 INFO L354 Elim1Store]: treesize reduction 402, result has 15.7 percent of original size [2021-12-07 00:52:02,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 13 disjoint index pairs (out of 105 index pairs), introduced 14 new quantified variables, introduced 31 case distinctions, treesize of input 202 treesize of output 116 [2021-12-07 00:52:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 75 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:52:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:53:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043065599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:48,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:53:48,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39] total 72 [2021-12-07 00:53:48,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655571360] [2021-12-07 00:53:48,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:53:48,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-07 00:53:48,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-07 00:53:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=7924, Unknown=60, NotChecked=0, Total=8930 [2021-12-07 00:53:48,087 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:54:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:35,956 INFO L93 Difference]: Finished difference Result 204 states and 256 transitions. [2021-12-07 00:54:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-07 00:54:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2021-12-07 00:54:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:35,958 INFO L225 Difference]: With dead ends: 204 [2021-12-07 00:54:35,958 INFO L226 Difference]: Without dead ends: 200 [2021-12-07 00:54:35,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7673 ImplicationChecksByTransitivity, 190.1s TimeCoverageRelationStatistics Valid=2432, Invalid=21054, Unknown=76, NotChecked=0, Total=23562 [2021-12-07 00:54:35,959 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 139 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:35,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 576 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1180 Invalid, 0 Unknown, 406 Unchecked, 0.8s Time] [2021-12-07 00:54:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-07 00:54:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 136. [2021-12-07 00:54:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 117 states have internal predecessors, (145), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-07 00:54:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2021-12-07 00:54:35,984 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 78 [2021-12-07 00:54:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:35,984 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2021-12-07 00:54:35,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:54:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2021-12-07 00:54:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 00:54:35,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:35,985 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:36,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 00:54:36,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:54:36,187 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -455264650, now seen corresponding path program 10 times [2021-12-07 00:54:36,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:36,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981533249] [2021-12-07 00:54:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:36,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:37,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:54:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:54:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:54:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:54:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:54:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:54:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:54:38,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981533249] [2021-12-07 00:54:38,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981533249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408041751] [2021-12-07 00:54:38,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:54:38,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:38,012 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:38,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:54:38,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:54:38,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:54:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 00:54:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:38,114 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 [2021-12-07 00:54:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:54:39,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2021-12-07 00:54:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:54:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 77 [2021-12-07 00:54:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:54:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:39,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 91 [2021-12-07 00:54:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:40,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 102 [2021-12-07 00:54:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 51 [2021-12-07 00:54:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:54:41,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408041751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:56,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:54:56,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33] total 66 [2021-12-07 00:54:56,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043765322] [2021-12-07 00:54:56,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:56,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-07 00:54:56,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-07 00:54:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=6491, Unknown=4, NotChecked=0, Total=6972 [2021-12-07 00:54:56,985 INFO L87 Difference]: Start difference. First operand 136 states and 169 transitions. Second operand has 66 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 66 states have internal predecessors, (100), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:55:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:02,386 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2021-12-07 00:55:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:55:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 66 states have internal predecessors, (100), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2021-12-07 00:55:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:02,388 INFO L225 Difference]: With dead ends: 180 [2021-12-07 00:55:02,388 INFO L226 Difference]: Without dead ends: 176 [2021-12-07 00:55:02,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=976, Invalid=11230, Unknown=4, NotChecked=0, Total=12210 [2021-12-07 00:55:02,389 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 84 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:02,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 723 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1828 Invalid, 0 Unknown, 544 Unchecked, 1.4s Time] [2021-12-07 00:55:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-07 00:55:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 160. [2021-12-07 00:55:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 138 states have (on average 1.2463768115942029) internal successors, (172), 138 states have internal predecessors, (172), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 00:55:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-12-07 00:55:02,418 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 78 [2021-12-07 00:55:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:02,418 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-12-07 00:55:02,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 66 states have internal predecessors, (100), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:55:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-12-07 00:55:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 00:55:02,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:02,419 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:02,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-07 00:55:02,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 00:55:02,621 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash -911671050, now seen corresponding path program 11 times [2021-12-07 00:55:02,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:02,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277088865] [2021-12-07 00:55:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:02,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:55:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:55:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:55:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:55:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:55:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:55:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:55:03,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277088865] [2021-12-07 00:55:03,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277088865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039840926] [2021-12-07 00:55:03,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:55:03,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:03,986 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:55:03,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 00:55:04,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-07 00:55:04,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:55:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-07 00:55:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:04,118 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 18 treesize of output 16 [2021-12-07 00:55:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:55:05,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 67 [2021-12-07 00:55:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:55:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 77 [2021-12-07 00:55:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:55:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:05,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2021-12-07 00:55:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:06,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 87 [2021-12-07 00:55:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 36 [2021-12-07 00:55:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:55:07,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:55:25,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039840926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:25,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:55:25,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 62 [2021-12-07 00:55:25,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891592418] [2021-12-07 00:55:25,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:55:25,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-07 00:55:25,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-07 00:55:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=5875, Unknown=3, NotChecked=0, Total=6320 [2021-12-07 00:55:25,214 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 62 states, 62 states have (on average 1.564516129032258) internal successors, (97), 62 states have internal predecessors, (97), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:55:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:27,850 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2021-12-07 00:55:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:55:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.564516129032258) internal successors, (97), 62 states have internal predecessors, (97), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2021-12-07 00:55:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:27,852 INFO L225 Difference]: With dead ends: 196 [2021-12-07 00:55:27,852 INFO L226 Difference]: Without dead ends: 192 [2021-12-07 00:55:27,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=726, Invalid=8973, Unknown=3, NotChecked=0, Total=9702 [2021-12-07 00:55:27,853 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:27,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 414 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 523 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2021-12-07 00:55:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-07 00:55:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 172. [2021-12-07 00:55:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 148 states have (on average 1.25) internal successors, (185), 148 states have internal predecessors, (185), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-07 00:55:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 215 transitions. [2021-12-07 00:55:27,887 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 215 transitions. Word has length 78 [2021-12-07 00:55:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 215 transitions. [2021-12-07 00:55:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.564516129032258) internal successors, (97), 62 states have internal predecessors, (97), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-07 00:55:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 215 transitions. [2021-12-07 00:55:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 00:55:27,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:27,888 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:27,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 00:55:28,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:28,089 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -849631436, now seen corresponding path program 12 times [2021-12-07 00:55:28,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:28,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487276526] [2021-12-07 00:55:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:28,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:55:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:55:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 00:55:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 00:55:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:55:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-07 00:55:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:55:29,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487276526] [2021-12-07 00:55:29,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487276526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801801689] [2021-12-07 00:55:29,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:55:29,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:29,444 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:55:29,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd2d9f36-107c-487b-acc3-eab2149937f6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 00:55:29,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-07 00:55:29,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:55:29,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 00:55:29,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:29,548 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 [2021-12-07 00:56:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:47,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:56:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:47,286 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-12-07 00:56:47,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 75 [2021-12-07 00:56:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:51,664 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-12-07 00:56:51,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 94 [2021-12-07 00:56:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:56,050 INFO L354 Elim1Store]: treesize reduction 126, result has 0.8 percent of original size [2021-12-07 00:56:56,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 113 [2021-12-07 00:56:58,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:58,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:58,376 INFO L354 Elim1Store]: treesize reduction 238, result has 15.6 percent of original size [2021-12-07 00:56:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 281 treesize of output 179 [2021-12-07 00:57:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:57:23,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:23,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 16 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 119 [2021-12-07 00:57:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 60 refuted. 4 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:57:24,786 INFO L328 TraceCheckSpWp]: Computing backward predicates...