./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 208d04089fa2c50848123d29dd18b6b2021c1b591464bd422fd10955aaeec7fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:49:42,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:49:42,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:49:42,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:49:42,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:49:42,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:49:42,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:49:42,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:49:42,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:49:42,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:49:42,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:49:42,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:49:42,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:49:42,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:49:42,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:49:42,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:49:42,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:49:42,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:49:42,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:49:42,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:49:42,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:49:42,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:49:42,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:49:42,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:49:42,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:49:42,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:49:42,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:49:42,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:49:42,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:49:42,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:49:42,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:49:42,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:49:42,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:49:42,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:49:42,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:49:42,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:49:42,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:49:42,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:49:42,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:49:42,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:49:42,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:49:42,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:49:42,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:49:42,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:49:42,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:49:42,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:49:42,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:49:42,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:49:42,190 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:49:42,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:49:42,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:49:42,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:49:42,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:49:42,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:49:42,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:49:42,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:49:42,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:49:42,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:49:42,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:49:42,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:49:42,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:49:42,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:49:42,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:49:42,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:49:42,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:49:42,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:49:42,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:49:42,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:49:42,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:49:42,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:49:42,197 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:49:42,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:49:42,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:49:42,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:49:42,200 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_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 208d04089fa2c50848123d29dd18b6b2021c1b591464bd422fd10955aaeec7fc [2021-11-23 13:49:42,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:49:42,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:49:42,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:49:42,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:49:42,544 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:49:42,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2021-11-23 13:49:42,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/data/91a30d2f9/d87dfdba2a3f4427a62e1476f7a0f787/FLAG8ba9d51fd [2021-11-23 13:49:43,298 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:49:43,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2021-11-23 13:49:43,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/data/91a30d2f9/d87dfdba2a3f4427a62e1476f7a0f787/FLAG8ba9d51fd [2021-11-23 13:49:43,527 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/data/91a30d2f9/d87dfdba2a3f4427a62e1476f7a0f787 [2021-11-23 13:49:43,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:49:43,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:49:43,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:49:43,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:49:43,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:49:43,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:43" (1/1) ... [2021-11-23 13:49:43,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426f8205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:43, skipping insertion in model container [2021-11-23 13:49:43,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:43" (1/1) ... [2021-11-23 13:49:43,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:49:43,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:49:44,049 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_bddb585b-9f01-4c52-8166-c2d630969c2f/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2021-11-23 13:49:44,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:49:44,076 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:49:44,163 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_bddb585b-9f01-4c52-8166-c2d630969c2f/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2021-11-23 13:49:44,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:49:44,196 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:49:44,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44 WrapperNode [2021-11-23 13:49:44,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:49:44,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:49:44,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:49:44,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:49:44,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,260 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 162 [2021-11-23 13:49:44,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:49:44,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:49:44,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:49:44,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:49:44,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:49:44,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:49:44,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:49:44,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:49:44,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (1/1) ... [2021-11-23 13:49:44,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:49:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:44,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:49:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:49:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:49:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:49:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:49:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:49:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:49:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 13:49:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 13:49:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:49:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 13:49:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:49:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:49:44,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:49:44,561 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:49:44,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:49:45,032 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:49:45,045 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:49:45,046 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:49:45,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:45 BoogieIcfgContainer [2021-11-23 13:49:45,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:49:45,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:49:45,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:49:45,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:49:45,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:49:43" (1/3) ... [2021-11-23 13:49:45,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6868926d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:45, skipping insertion in model container [2021-11-23 13:49:45,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:44" (2/3) ... [2021-11-23 13:49:45,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6868926d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:45, skipping insertion in model container [2021-11-23 13:49:45,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:45" (3/3) ... [2021-11-23 13:49:45,061 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2021-11-23 13:49:45,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:49:45,074 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:49:45,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:49:45,140 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:49:45,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:49:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:49:45,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:45,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:45,167 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash -978429474, now seen corresponding path program 1 times [2021-11-23 13:49:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:45,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086370739] [2021-11-23 13:49:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:45,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:45,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:45,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086370739] [2021-11-23 13:49:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086370739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:45,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:45,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:49:45,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982950331] [2021-11-23 13:49:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:45,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:49:45,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:49:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:45,490 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:45,534 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-11-23 13:49:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:49:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:49:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:45,548 INFO L225 Difference]: With dead ends: 64 [2021-11-23 13:49:45,549 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 13:49:45,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:49:45,559 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:45,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:49:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 13:49:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-23 13:49:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-23 13:49:45,613 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2021-11-23 13:49:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:45,614 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-23 13:49:45,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-23 13:49:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:49:45,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:45,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:45,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:49:45,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1498712942, now seen corresponding path program 1 times [2021-11-23 13:49:45,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822900599] [2021-11-23 13:49:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:45,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:46,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822900599] [2021-11-23 13:49:46,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822900599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:46,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:46,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 13:49:46,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756204143] [2021-11-23 13:49:46,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:46,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 13:49:46,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 13:49:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:49:46,231 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:46,732 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-23 13:49:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:49:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:49:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:46,738 INFO L225 Difference]: With dead ends: 49 [2021-11-23 13:49:46,739 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 13:49:46,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:49:46,742 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:46,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 28 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:49:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 13:49:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-23 13:49:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-23 13:49:46,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2021-11-23 13:49:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:46,751 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-23 13:49:46,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:49:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-23 13:49:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:49:46,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:46,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:46,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:49:46,754 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1496865900, now seen corresponding path program 1 times [2021-11-23 13:49:46,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222235485] [2021-11-23 13:49:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:46,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:49:48,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:48,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222235485] [2021-11-23 13:49:48,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222235485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:48,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052131811] [2021-11-23 13:49:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:48,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:48,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:48,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddb585b-9f01-4c52-8166-c2d630969c2f/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:49:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-23 13:49:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:49:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 13:49:48,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:49:48,825 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 13:49:48,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-23 13:49:49,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:49:49,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 13:49:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-23 13:49:49,728 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 13:49:49,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 64 [2021-11-23 13:49:49,802 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-23 13:49:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 57 [2021-11-23 13:49:50,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:49:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:49:50,054 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-11-23 13:49:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-11-23 13:49:50,483 INFO L354 Elim1Store]: treesize reduction 223, result has 11.2 percent of original size [2021-11-23 13:49:50,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 177 [2021-11-23 13:49:50,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:49:50,621 INFO L354 Elim1Store]: treesize reduction 328, result has 8.6 percent of original size [2021-11-23 13:49:50,621 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 149 treesize of output 109 [2021-11-23 13:49:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:49:50,675 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-23 13:49:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 130 [2021-11-23 13:50:22,906 WARN L227 SmtUtils]: Spent 31.66s on a formula simplification. DAG size of input: 908 DAG size of output: 260 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 13:50:22,909 INFO L354 Elim1Store]: treesize reduction 9671, result has 8.1 percent of original size [2021-11-23 13:50:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 9 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 19 new quantified variables, introduced 96 case distinctions, treesize of input 64917 treesize of output 17112 [2021-11-23 13:51:51,523 WARN L227 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 1449 DAG size of output: 514 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 13:51:51,527 INFO L354 Elim1Store]: treesize reduction 15589, result has 9.9 percent of original size [2021-11-23 13:51:51,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 27 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 33 new quantified variables, introduced 162 case distinctions, treesize of input 3649382 treesize of output 1007835 [2021-11-23 13:51:58,303 INFO L354 Elim1Store]: treesize reduction 101, result has 9.8 percent of original size [2021-11-23 13:51:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1597825 treesize of output 1597753 [2021-11-23 13:52:09,564 INFO L354 Elim1Store]: treesize reduction 380, result has 11.8 percent of original size [2021-11-23 13:52:09,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1597658 treesize of output 1597590 [2021-11-23 13:52:14,055 INFO L354 Elim1Store]: treesize reduction 918, result has 9.8 percent of original size [2021-11-23 13:52:14,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 9 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 1597548 treesize of output 1166158