./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/scopes3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7efcb16e512d7de15a71f6cd895dcd8493c4b646 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:24:13,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:24:13,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:24:13,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:24:13,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:24:13,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:24:13,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:24:13,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:24:13,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:24:13,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:24:13,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:24:13,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:24:13,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:24:13,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:24:13,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:24:13,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:24:13,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:24:13,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:24:13,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:24:13,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:24:13,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:24:13,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:24:13,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:24:13,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:24:13,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:24:13,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:24:13,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:24:13,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:24:13,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:24:13,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:24:13,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:24:13,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:24:13,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:24:13,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:24:13,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:24:13,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:24:13,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:24:13,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:24:13,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:24:13,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:24:13,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:24:13,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:24:13,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:24:13,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:24:13,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:24:13,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:24:13,207 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:24:13,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:24:13,207 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:24:13,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:24:13,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:24:13,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:24:13,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:24:13,209 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:24:13,209 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:24:13,209 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:24:13,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:24:13,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:24:13,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:24:13,210 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:24:13,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:24:13,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:24:13,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:24:13,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:24:13,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:24:13,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:24:13,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:24:13,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:24:13,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:24:13,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:24:13,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2020-10-19 18:24:13,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:24:13,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:24:13,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:24:13,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:24:13,575 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:24:13,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-10-19 18:24:13,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb147722/e3b68aeeb858487f98cb7ef5363527c2/FLAGbe8103f19 [2020-10-19 18:24:14,034 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:24:14,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-10-19 18:24:14,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb147722/e3b68aeeb858487f98cb7ef5363527c2/FLAGbe8103f19 [2020-10-19 18:24:14,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb147722/e3b68aeeb858487f98cb7ef5363527c2 [2020-10-19 18:24:14,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:24:14,374 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:24:14,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:24:14,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:24:14,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:24:14,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af35513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14, skipping insertion in model container [2020-10-19 18:24:14,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:24:14,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:24:14,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:24:14,654 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:24:14,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:24:14,689 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:24:14,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14 WrapperNode [2020-10-19 18:24:14,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:24:14,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:24:14,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:24:14,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:24:14,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... [2020-10-19 18:24:14,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:24:14,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:24:14,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:24:14,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:24:14,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:24:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:24:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:24:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:24:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:24:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:24:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:24:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:24:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:24:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:24:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:24:15,229 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:24:15,229 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:24:15,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:15 BoogieIcfgContainer [2020-10-19 18:24:15,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:24:15,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:24:15,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:24:15,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:24:15,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:24:14" (1/3) ... [2020-10-19 18:24:15,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18eeff81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:24:15, skipping insertion in model container [2020-10-19 18:24:15,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:14" (2/3) ... [2020-10-19 18:24:15,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18eeff81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:24:15, skipping insertion in model container [2020-10-19 18:24:15,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:15" (3/3) ... [2020-10-19 18:24:15,240 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes3.c [2020-10-19 18:24:15,251 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:24:15,258 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-10-19 18:24:15,272 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-19 18:24:15,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:24:15,293 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:24:15,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:24:15,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:24:15,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:24:15,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:24:15,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:24:15,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:24:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 18:24:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:15,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:15,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:15,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:15,323 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2020-10-19 18:24:15,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:15,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416241106] [2020-10-19 18:24:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:15,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416241106] [2020-10-19 18:24:15,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:15,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:15,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216080592] [2020-10-19 18:24:15,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:24:15,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:24:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:24:15,520 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-10-19 18:24:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:15,594 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-10-19 18:24:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:24:15,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-19 18:24:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:15,605 INFO L225 Difference]: With dead ends: 26 [2020-10-19 18:24:15,605 INFO L226 Difference]: Without dead ends: 21 [2020-10-19 18:24:15,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:24:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-19 18:24:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-19 18:24:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 18:24:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 18:24:15,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-10-19 18:24:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:15,638 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 18:24:15,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:24:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 18:24:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:15,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:15,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:15,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:24:15,640 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2020-10-19 18:24:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:15,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988668803] [2020-10-19 18:24:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:15,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988668803] [2020-10-19 18:24:15,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:15,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379128091] [2020-10-19 18:24:15,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:15,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:15,704 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-19 18:24:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:15,765 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-19 18:24:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:24:15,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:24:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:15,767 INFO L225 Difference]: With dead ends: 22 [2020-10-19 18:24:15,767 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 18:24:15,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 18:24:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-10-19 18:24:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 18:24:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-19 18:24:15,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2020-10-19 18:24:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:15,774 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-19 18:24:15,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-19 18:24:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:15,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:15,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:15,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:24:15,776 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2020-10-19 18:24:15,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:15,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839217488] [2020-10-19 18:24:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:15,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839217488] [2020-10-19 18:24:15,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:15,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:15,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252882307] [2020-10-19 18:24:15,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:15,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:15,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:15,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:15,888 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2020-10-19 18:24:16,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,087 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-19 18:24:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:16,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:24:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,090 INFO L225 Difference]: With dead ends: 16 [2020-10-19 18:24:16,090 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 18:24:16,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 18:24:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 18:24:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 18:24:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-19 18:24:16,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2020-10-19 18:24:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,099 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-19 18:24:16,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-19 18:24:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:16,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:16,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:24:16,101 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2020-10-19 18:24:16,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:16,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179146507] [2020-10-19 18:24:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179146507] [2020-10-19 18:24:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569992780] [2020-10-19 18:24:16,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:16,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:16,154 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2020-10-19 18:24:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,183 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-19 18:24:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:16,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:24:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,184 INFO L225 Difference]: With dead ends: 15 [2020-10-19 18:24:16,184 INFO L226 Difference]: Without dead ends: 15 [2020-10-19 18:24:16,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-19 18:24:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-19 18:24:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 18:24:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-19 18:24:16,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2020-10-19 18:24:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,189 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-19 18:24:16,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-19 18:24:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:24:16,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:16,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:24:16,191 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2020-10-19 18:24:16,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:16,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462842298] [2020-10-19 18:24:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462842298] [2020-10-19 18:24:16,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960614807] [2020-10-19 18:24:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:24:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:16,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 18:24:16,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234437777] [2020-10-19 18:24:16,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:24:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:24:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:24:16,374 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-19 18:24:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,421 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-19 18:24:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:24:16,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-19 18:24:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,423 INFO L225 Difference]: With dead ends: 20 [2020-10-19 18:24:16,423 INFO L226 Difference]: Without dead ends: 20 [2020-10-19 18:24:16,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:24:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-19 18:24:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-19 18:24:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 18:24:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-19 18:24:16,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2020-10-19 18:24:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,429 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-19 18:24:16,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:24:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-19 18:24:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 18:24:16,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:16,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:16,642 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:16,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2020-10-19 18:24:16,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:16,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776829023] [2020-10-19 18:24:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776829023] [2020-10-19 18:24:16,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640410772] [2020-10-19 18:24:16,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:16,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:24:16,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:24:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:16,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-19 18:24:16,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990036658] [2020-10-19 18:24:16,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:24:16,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:24:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:24:16,797 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-10-19 18:24:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,851 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-19 18:24:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:24:16,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-19 18:24:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,853 INFO L225 Difference]: With dead ends: 23 [2020-10-19 18:24:16,853 INFO L226 Difference]: Without dead ends: 23 [2020-10-19 18:24:16,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:24:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-19 18:24:16,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-19 18:24:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 18:24:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-19 18:24:16,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-10-19 18:24:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,859 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-19 18:24:16,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:24:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-19 18:24:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:24:16,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:17,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:17,074 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:17,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2020-10-19 18:24:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:17,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275583803] [2020-10-19 18:24:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275583803] [2020-10-19 18:24:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055701542] [2020-10-19 18:24:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:17,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-19 18:24:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:24:17,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:17,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-19 18:24:17,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871863564] [2020-10-19 18:24:17,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:24:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:24:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:24:17,290 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-19 18:24:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:17,346 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-19 18:24:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:24:17,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-19 18:24:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:17,348 INFO L225 Difference]: With dead ends: 26 [2020-10-19 18:24:17,348 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 18:24:17,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:24:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 18:24:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-19 18:24:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 18:24:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-19 18:24:17,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2020-10-19 18:24:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:17,354 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-19 18:24:17,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:24:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-19 18:24:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:24:17,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:17,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:17,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:17,557 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2020-10-19 18:24:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:17,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455871096] [2020-10-19 18:24:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455871096] [2020-10-19 18:24:17,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667806335] [2020-10-19 18:24:17,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:17,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:24:17,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:24:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:17,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-19 18:24:17,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499932712] [2020-10-19 18:24:17,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:24:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:17,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:24:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:24:17,741 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-19 18:24:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:17,800 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-19 18:24:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:24:17,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-19 18:24:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:17,802 INFO L225 Difference]: With dead ends: 29 [2020-10-19 18:24:17,802 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 18:24:17,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:24:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 18:24:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-19 18:24:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 18:24:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-19 18:24:17,807 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2020-10-19 18:24:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:17,808 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-19 18:24:17,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:24:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-19 18:24:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:24:17,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:17,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:18,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,021 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2020-10-19 18:24:18,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:18,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726778333] [2020-10-19 18:24:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726778333] [2020-10-19 18:24:18,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020673825] [2020-10-19 18:24:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-19 18:24:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:24:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:18,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-19 18:24:18,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965554466] [2020-10-19 18:24:18,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:24:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:24:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:24:18,236 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2020-10-19 18:24:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:18,327 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-19 18:24:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:24:18,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-19 18:24:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:18,329 INFO L225 Difference]: With dead ends: 32 [2020-10-19 18:24:18,329 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 18:24:18,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:24:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 18:24:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-19 18:24:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:24:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-19 18:24:18,334 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2020-10-19 18:24:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:18,334 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-19 18:24:18,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:24:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-19 18:24:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:24:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:18,335 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:18,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2020-10-19 18:24:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:18,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307117495] [2020-10-19 18:24:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307117495] [2020-10-19 18:24:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738565834] [2020-10-19 18:24:18,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-19 18:24:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:18,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:24:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:18,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-19 18:24:18,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208074112] [2020-10-19 18:24:18,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:24:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:24:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:24:18,769 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-10-19 18:24:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:18,837 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-19 18:24:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:24:18,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-19 18:24:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:18,838 INFO L225 Difference]: With dead ends: 35 [2020-10-19 18:24:18,839 INFO L226 Difference]: Without dead ends: 35 [2020-10-19 18:24:18,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:24:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-19 18:24:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-19 18:24:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-19 18:24:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-19 18:24:18,844 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2020-10-19 18:24:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:18,845 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-19 18:24:18,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:24:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-19 18:24:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:24:18,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:18,846 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:19,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:19,058 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2020-10-19 18:24:19,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:19,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19910136] [2020-10-19 18:24:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:19,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19910136] [2020-10-19 18:24:19,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521133548] [2020-10-19 18:24:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:24:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:19,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:19,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-19 18:24:19,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407125102] [2020-10-19 18:24:19,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:24:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:24:19,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:24:19,287 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 12 states. [2020-10-19 18:24:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:19,366 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-19 18:24:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:24:19,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-19 18:24:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:19,367 INFO L225 Difference]: With dead ends: 38 [2020-10-19 18:24:19,367 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 18:24:19,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:24:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 18:24:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-19 18:24:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 18:24:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-19 18:24:19,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2020-10-19 18:24:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:19,376 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-19 18:24:19,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:24:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-19 18:24:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:24:19,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:19,381 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:19,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:19,592 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2020-10-19 18:24:19,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:19,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829329970] [2020-10-19 18:24:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:19,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829329970] [2020-10-19 18:24:19,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531664679] [2020-10-19 18:24:19,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:19,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:24:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:24:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:19,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:19,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-19 18:24:19,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375645890] [2020-10-19 18:24:19,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 18:24:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:24:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:24:19,820 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2020-10-19 18:24:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:19,892 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-19 18:24:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:24:19,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-19 18:24:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:19,894 INFO L225 Difference]: With dead ends: 41 [2020-10-19 18:24:19,894 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 18:24:19,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:24:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 18:24:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-19 18:24:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 18:24:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-19 18:24:19,899 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2020-10-19 18:24:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:19,900 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-19 18:24:19,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 18:24:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-19 18:24:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:24:19,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:19,901 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:20,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 18:24:20,111 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2020-10-19 18:24:20,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:20,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587823970] [2020-10-19 18:24:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587823970] [2020-10-19 18:24:20,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182125592] [2020-10-19 18:24:20,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:20,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-19 18:24:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:20,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:24:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:20,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:20,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-19 18:24:20,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518014854] [2020-10-19 18:24:20,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 18:24:20,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:20,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 18:24:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:24:20,433 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 14 states. [2020-10-19 18:24:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:20,496 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-19 18:24:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 18:24:20,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-19 18:24:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:20,497 INFO L225 Difference]: With dead ends: 42 [2020-10-19 18:24:20,497 INFO L226 Difference]: Without dead ends: 42 [2020-10-19 18:24:20,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:24:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-19 18:24:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-19 18:24:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 18:24:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-19 18:24:20,502 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2020-10-19 18:24:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:20,502 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-19 18:24:20,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 18:24:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-19 18:24:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-19 18:24:20,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:20,503 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:20,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:20,705 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:24:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2020-10-19 18:24:20,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:20,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996550827] [2020-10-19 18:24:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:24:20,738 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:24:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:24:20,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:24:20,830 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:24:20,831 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:24:20,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:24:20,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:24:20 BoogieIcfgContainer [2020-10-19 18:24:20,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:24:20,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:24:20,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:24:20,901 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:24:20,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:15" (3/4) ... [2020-10-19 18:24:20,904 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:24:20,983 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:24:20,983 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:24:20,986 INFO L168 Benchmark]: Toolchain (without parser) took 6617.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -97.9 MB). Peak memory consumption was 97.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,986 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:24:20,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.21 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,988 INFO L168 Benchmark]: Boogie Preprocessor took 95.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -167.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,988 INFO L168 Benchmark]: RCFGBuilder took 445.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,989 INFO L168 Benchmark]: TraceAbstraction took 5668.04 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 40.3 MB). Peak memory consumption was 110.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,989 INFO L168 Benchmark]: Witness Printer took 82.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:24:20,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.21 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 95.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -167.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 445.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5668.04 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 40.3 MB). Peak memory consumption was 110.1 MB. Max. memory is 11.5 GB. * Witness Printer took 82.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=0, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={4:0}, i=1, p={4:0}] [L6] p[0] = 1 VAL [a={4:0}, i=1, p={4:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={5:0}, i=2, p={5:0}] [L6] p[0] = 1 VAL [a={5:0}, i=2, p={5:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={6:0}, i=3, p={6:0}] [L6] p[0] = 1 VAL [a={6:0}, i=3, p={6:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={7:0}, i=4, p={7:0}] [L6] p[0] = 1 VAL [a={7:0}, i=4, p={7:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={8:0}, i=5, p={8:0}] [L6] p[0] = 1 VAL [a={8:0}, i=5, p={8:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={9:0}, i=6, p={9:0}] [L6] p[0] = 1 VAL [a={9:0}, i=6, p={9:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={10:0}, i=7, p={10:0}] [L6] p[0] = 1 VAL [a={10:0}, i=7, p={10:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={11:0}, i=8, p={11:0}] [L6] p[0] = 1 VAL [a={11:0}, i=8, p={11:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={2:0}, i=9, p={2:0}] [L6] p[0] = 1 VAL [a={2:0}, i=9, p={2:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={2:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 132 SDslu, 533 SDs, 0 SdLazy, 398 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 22 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 484 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 26952 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1181 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...