./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.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/ldv-memsafety/ArraysOfVariableLength6.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 07b05923cf5c1b39a35ab81b524575a0a488c268 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:06:52,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:06:52,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:06:52,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:06:52,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:06:52,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:06:52,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:06:52,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:06:52,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:06:52,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:06:52,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:06:52,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:06:52,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:06:52,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:06:52,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:06:52,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:06:52,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:06:52,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:06:52,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:06:52,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:06:52,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:06:52,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:06:52,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:06:52,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:06:53,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:06:53,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:06:53,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:06:53,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:06:53,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:06:53,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:06:53,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:06:53,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:06:53,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:06:53,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:06:53,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:06:53,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:06:53,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:06:53,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:06:53,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:06:53,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:06:53,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:06:53,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:06:53,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:06:53,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:06:53,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:06:53,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:06:53,086 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:06:53,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:06:53,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:06:53,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:06:53,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:06:53,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:06:53,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:06:53,088 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:06:53,088 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:06:53,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:06:53,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:06:53,089 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:06:53,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:06:53,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:06:53,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:06:53,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:06:53,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:06:53,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:06:53,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:06:53,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:06:53,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:06:53,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:06:53,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:06:53,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:06:53,093 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 -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2020-10-19 18:06:53,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:06:53,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:06:53,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:06:53,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:06:53,465 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:06:53,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-10-19 18:06:53,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9322893e1/93947974f78443f0b3cb1566c8326b1b/FLAG3c2a55a9c [2020-10-19 18:06:53,997 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:06:53,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-10-19 18:06:54,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9322893e1/93947974f78443f0b3cb1566c8326b1b/FLAG3c2a55a9c [2020-10-19 18:06:54,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9322893e1/93947974f78443f0b3cb1566c8326b1b [2020-10-19 18:06:54,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:06:54,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:06:54,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:54,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:06:54,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:06:54,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5f6027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54, skipping insertion in model container [2020-10-19 18:06:54,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:06:54,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:06:54,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:54,526 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:06:54,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:54,561 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:06:54,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54 WrapperNode [2020-10-19 18:06:54,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:54,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:06:54,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:06:54,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:06:54,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (1/1) ... [2020-10-19 18:06:54,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:06:54,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:06:54,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:06:54,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:06:54,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (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 18:06:54,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:06:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:06:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:06:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:06:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:06:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:06:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:06:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:06:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:06:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:06:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:06:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:06:55,105 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:06:55,106 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:06:55,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:55 BoogieIcfgContainer [2020-10-19 18:06:55,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:06:55,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:06:55,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:06:55,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:06:55,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:06:54" (1/3) ... [2020-10-19 18:06:55,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33de8b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:55, skipping insertion in model container [2020-10-19 18:06:55,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:54" (2/3) ... [2020-10-19 18:06:55,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33de8b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:55, skipping insertion in model container [2020-10-19 18:06:55,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:55" (3/3) ... [2020-10-19 18:06:55,119 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2020-10-19 18:06:55,132 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:06:55,141 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-19 18:06:55,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-19 18:06:55,175 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:06:55,176 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:06:55,176 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:06:55,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:06:55,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:06:55,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:06:55,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:06:55,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:06:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-19 18:06:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:06:55,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:55,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:55,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-10-19 18:06:55,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017352489] [2020-10-19 18:06:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,457 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 18:06:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017352489] [2020-10-19 18:06:55,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:55,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:06:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391177010] [2020-10-19 18:06:55,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:55,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:55,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:55,494 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-19 18:06:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:55,701 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:06:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:55,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:06:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:55,715 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:06:55,715 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:06:55,718 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 18:06:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:06:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-19 18:06:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 18:06:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-19 18:06:55,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-10-19 18:06:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:55,772 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-19 18:06:55,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-19 18:06:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:06:55,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:55,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:55,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:06:55,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-10-19 18:06:55,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:55,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936811797] [2020-10-19 18:06:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,870 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 18:06:55,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936811797] [2020-10-19 18:06:55,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:55,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:55,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717434554] [2020-10-19 18:06:55,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:55,879 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-10-19 18:06:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:56,041 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-19 18:06:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:56,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 18:06:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:56,045 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:06:56,046 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:06:56,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:06:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:06:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-19 18:06:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:06:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 18:06:56,055 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-10-19 18:06:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:56,056 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 18:06:56,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 18:06:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:06:56,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:56,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:06:56,058 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-10-19 18:06:56,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245892856] [2020-10-19 18:06:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,145 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 18:06:56,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245892856] [2020-10-19 18:06:56,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:56,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:06:56,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024732758] [2020-10-19 18:06:56,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:06:56,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:06:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:56,150 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-10-19 18:06:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:56,312 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-19 18:06:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:06:56,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-19 18:06:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:56,315 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:06:56,315 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 18:06:56,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 18:06:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 18:06:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 18:06:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-19 18:06:56,323 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-10-19 18:06:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:56,323 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-19 18:06:56,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:06:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-19 18:06:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:06:56,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:56,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:06:56,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-10-19 18:06:56,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247920081] [2020-10-19 18:06:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,438 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 18:06:56,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247920081] [2020-10-19 18:06:56,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:56,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:06:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354506441] [2020-10-19 18:06:56,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:06:56,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:06:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:56,442 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2020-10-19 18:06:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:56,633 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-19 18:06:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:06:56,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-19 18:06:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:56,635 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:06:56,636 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 18:06:56,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 18:06:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-19 18:06:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:06:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 18:06:56,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-10-19 18:06:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:56,645 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 18:06:56,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:06:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 18:06:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:06:56,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:56,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:06:56,647 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,648 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-10-19 18:06:56,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810878179] [2020-10-19 18:06:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,743 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 18:06:56,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810878179] [2020-10-19 18:06:56,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:56,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:06:56,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925343054] [2020-10-19 18:06:56,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:06:56,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:06:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:06:56,747 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-10-19 18:06:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:56,891 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-19 18:06:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:56,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-19 18:06:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:56,893 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:06:56,894 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:06:56,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:06:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-19 18:06:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:06:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-19 18:06:56,901 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2020-10-19 18:06:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:56,902 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-19 18:06:56,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:06:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-19 18:06:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:06:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:56,904 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:06:56,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-10-19 18:06:56,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521664411] [2020-10-19 18:06:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:56,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521664411] [2020-10-19 18:06:56,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823830303] [2020-10-19 18:06:56,995 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 18:06:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:06:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:57,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:57,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-10-19 18:06:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062803401] [2020-10-19 18:06:57,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:06:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:06:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:06:57,117 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-10-19 18:06:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:57,262 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-19 18:06:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:57,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-19 18:06:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:57,264 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:06:57,265 INFO L226 Difference]: Without dead ends: 52 [2020-10-19 18:06:57,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-19 18:06:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-19 18:06:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-19 18:06:57,278 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-10-19 18:06:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:57,279 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-19 18:06:57,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:06:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-19 18:06:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:06:57,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:57,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:57,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-19 18:06:57,494 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2020-10-19 18:06:57,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:57,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324203611] [2020-10-19 18:06:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:06:57,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324203611] [2020-10-19 18:06:57,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:57,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 18:06:57,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308223010] [2020-10-19 18:06:57,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:06:57,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:57,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:06:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:57,640 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2020-10-19 18:06:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:57,840 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-19 18:06:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:06:57,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-19 18:06:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:57,842 INFO L225 Difference]: With dead ends: 44 [2020-10-19 18:06:57,843 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 18:06:57,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 18:06:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-19 18:06:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:06:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-19 18:06:57,853 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-10-19 18:06:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:57,853 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-19 18:06:57,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:06:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-19 18:06:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:06:57,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:57,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:06:57,857 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-10-19 18:06:57,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:57,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062365254] [2020-10-19 18:06:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,025 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 18:06:58,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062365254] [2020-10-19 18:06:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280515453] [2020-10-19 18:06:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:06:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:06:58,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:58,170 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 18:06:58,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:58,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-19 18:06:58,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597678126] [2020-10-19 18:06:58,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:06:58,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:06:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:58,173 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-10-19 18:06:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:58,489 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-19 18:06:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:58,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-19 18:06:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:58,491 INFO L225 Difference]: With dead ends: 50 [2020-10-19 18:06:58,491 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 18:06:58,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 18:06:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-19 18:06:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:06:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-19 18:06:58,497 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2020-10-19 18:06:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:58,497 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-19 18:06:58,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:06:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-19 18:06:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:06:58,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:58,498 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:58,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:58,700 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2020-10-19 18:06:58,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:58,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538292566] [2020-10-19 18:06:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:58,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538292566] [2020-10-19 18:06:58,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342754187] [2020-10-19 18:06:58,796 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 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 18:06:58,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:06:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:06:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:06:58,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:58,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-10-19 18:06:58,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320602447] [2020-10-19 18:06:58,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:06:58,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:58,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:06:58,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:58,920 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-10-19 18:06:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:59,173 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:06:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:06:59,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-19 18:06:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:59,176 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:06:59,176 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 18:06:59,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:06:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 18:06:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-19 18:06:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 18:06:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-19 18:06:59,186 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2020-10-19 18:06:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:59,187 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-19 18:06:59,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:06:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-19 18:06:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:06:59,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:59,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:59,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:59,401 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2020-10-19 18:06:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:59,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028359854] [2020-10-19 18:06:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:59,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028359854] [2020-10-19 18:06:59,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876132761] [2020-10-19 18:06:59,537 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:06:59,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:06:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:06:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:59,618 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 18:06:59,619 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:06:59,620 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:59,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:59,627 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:06:59,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-10-19 18:06:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:59,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:59,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-10-19 18:06:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334015371] [2020-10-19 18:06:59,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:59,718 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2020-10-19 18:06:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:59,748 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-19 18:06:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:59,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:06:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:59,750 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:06:59,750 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 18:06:59,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 18:06:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 18:06:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 18:06:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-19 18:06:59,754 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-10-19 18:06:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:59,754 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-19 18:06:59,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-19 18:06:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:06:59,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:59,755 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:59,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:59,956 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2020-10-19 18:06:59,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:59,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968774826] [2020-10-19 18:06:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:07:00,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968774826] [2020-10-19 18:07:00,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242731995] [2020-10-19 18:07:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:07:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:07:00,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:00,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-19 18:07:00,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872645901] [2020-10-19 18:07:00,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:07:00,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:00,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:07:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:07:00,215 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-10-19 18:07:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:00,497 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-19 18:07:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:00,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-19 18:07:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:00,499 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:07:00,499 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:07:00,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:07:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:07:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-19 18:07:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:07:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 18:07:00,505 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-10-19 18:07:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:00,505 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 18:07:00,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:07:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 18:07:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:07:00,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:00,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:00,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-19 18:07:00,718 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2020-10-19 18:07:00,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:00,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920765314] [2020-10-19 18:07:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:07:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920765314] [2020-10-19 18:07:00,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430250539] [2020-10-19 18:07:00,894 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 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 18:07:00,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:00,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:00,943 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_25|]} [2020-10-19 18:07:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:00,950 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:07:00,950 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:00,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:00,968 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:07:00,970 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:00,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:00,978 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:07:00,978 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-10-19 18:07:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 18:07:01,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:01,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2020-10-19 18:07:01,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741420701] [2020-10-19 18:07:01,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:07:01,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:07:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:01,116 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-10-19 18:07:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:01,168 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-19 18:07:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:07:01,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:07:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:01,170 INFO L225 Difference]: With dead ends: 50 [2020-10-19 18:07:01,170 INFO L226 Difference]: Without dead ends: 50 [2020-10-19 18:07:01,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-19 18:07:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-19 18:07:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-19 18:07:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-19 18:07:01,179 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2020-10-19 18:07:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:01,180 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-19 18:07:01,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:07:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-19 18:07:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 18:07:01,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:01,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:01,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:01,401 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2020-10-19 18:07:01,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:01,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606134140] [2020-10-19 18:07:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 18:07:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606134140] [2020-10-19 18:07:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50363890] [2020-10-19 18:07:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order 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 18:07:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:01,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:07:01,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:01,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-10-19 18:07:01,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008801772] [2020-10-19 18:07:01,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:07:01,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:07:01,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:01,612 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-19 18:07:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:01,880 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-19 18:07:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:07:01,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-19 18:07:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:01,882 INFO L225 Difference]: With dead ends: 84 [2020-10-19 18:07:01,882 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 18:07:01,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:07:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 18:07:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-19 18:07:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 18:07:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-19 18:07:01,896 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2020-10-19 18:07:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:01,898 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-19 18:07:01,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:07:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-19 18:07:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-19 18:07:01,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:01,902 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:02,106 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2020-10-19 18:07:02,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821401712] [2020-10-19 18:07:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-19 18:07:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 18:07:02,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821401712] [2020-10-19 18:07:02,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251993038] [2020-10-19 18:07:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:07:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-19 18:07:02,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:02,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-19 18:07:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884226642] [2020-10-19 18:07:02,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 18:07:02,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 18:07:02,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:07:02,604 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 15 states. [2020-10-19 18:07:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,992 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-19 18:07:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:07:02,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-19 18:07:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,994 INFO L225 Difference]: With dead ends: 72 [2020-10-19 18:07:02,994 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:07:02,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:07:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:07:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-19 18:07:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 18:07:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-19 18:07:02,999 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2020-10-19 18:07:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,999 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-19 18:07:02,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 18:07:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-19 18:07:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-19 18:07:03,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:03,001 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:03,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 18:07:03,213 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:03,214 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2020-10-19 18:07:03,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:03,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320833513] [2020-10-19 18:07:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-19 18:07:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-19 18:07:03,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320833513] [2020-10-19 18:07:03,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924046617] [2020-10-19 18:07:03,473 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 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 18:07:03,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:03,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:07:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-19 18:07:03,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:03,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-19 18:07:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470975612] [2020-10-19 18:07:03,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 18:07:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 18:07:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:07:03,688 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 17 states. [2020-10-19 18:07:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:04,184 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-19 18:07:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:07:04,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-19 18:07:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:04,191 INFO L225 Difference]: With dead ends: 77 [2020-10-19 18:07:04,191 INFO L226 Difference]: Without dead ends: 74 [2020-10-19 18:07:04,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-10-19 18:07:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-19 18:07:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-19 18:07:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-19 18:07:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-19 18:07:04,197 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2020-10-19 18:07:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:04,198 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-19 18:07:04,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 18:07:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-19 18:07:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-19 18:07:04,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:04,200 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:04,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 18:07:04,411 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2020-10-19 18:07:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556937871] [2020-10-19 18:07:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-19 18:07:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-19 18:07:04,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556937871] [2020-10-19 18:07:04,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261827307] [2020-10-19 18:07:04,744 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:04,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:04,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 18:07:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:04,803 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-10-19 18:07:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:04,808 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:07:04,808 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:04,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:04,822 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:07:04,824 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:04,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:04,831 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:07:04,831 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-10-19 18:07:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-10-19 18:07:05,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:05,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2020-10-19 18:07:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821585941] [2020-10-19 18:07:05,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 18:07:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 18:07:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:07:05,138 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 16 states. [2020-10-19 18:07:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:05,889 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-19 18:07:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-19 18:07:05,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-19 18:07:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:05,891 INFO L225 Difference]: With dead ends: 87 [2020-10-19 18:07:05,891 INFO L226 Difference]: Without dead ends: 84 [2020-10-19 18:07:05,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-19 18:07:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-19 18:07:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-19 18:07:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:07:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-19 18:07:05,896 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2020-10-19 18:07:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:05,896 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-19 18:07:05,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 18:07:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-19 18:07:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-19 18:07:05,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:05,898 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:06,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 18:07:06,099 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:06,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2020-10-19 18:07:06,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:06,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182059479] [2020-10-19 18:07:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-19 18:07:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2020-10-19 18:07:06,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182059479] [2020-10-19 18:07:06,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523010323] [2020-10-19 18:07:06,206 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:06,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:06,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:06,251 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2020-10-19 18:07:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:06,256 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:07:06,256 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:06,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:06,269 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:07:06,270 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:06,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:06,277 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:07:06,277 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-19 18:07:06,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:06,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-10-19 18:07:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982391550] [2020-10-19 18:07:06,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:07:06,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:07:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:06,491 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-10-19 18:07:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:06,543 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-19 18:07:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:07:06,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-19 18:07:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:06,545 INFO L225 Difference]: With dead ends: 79 [2020-10-19 18:07:06,545 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:07:06,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:07:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-19 18:07:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:07:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-19 18:07:06,551 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2020-10-19 18:07:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:06,551 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-19 18:07:06,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:07:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-19 18:07:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-19 18:07:06,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:06,556 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:06,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 18:07:06,769 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2020-10-19 18:07:06,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:06,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522745918] [2020-10-19 18:07:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-19 18:07:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-19 18:07:07,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522745918] [2020-10-19 18:07:07,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674562945] [2020-10-19 18:07:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:07:07,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-19 18:07:07,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:07,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-19 18:07:07,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855555650] [2020-10-19 18:07:07,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-19 18:07:07,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-19 18:07:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:07:07,478 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 21 states. [2020-10-19 18:07:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:08,134 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-19 18:07:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:07:08,135 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-10-19 18:07:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:08,136 INFO L225 Difference]: With dead ends: 90 [2020-10-19 18:07:08,136 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 18:07:08,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-10-19 18:07:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 18:07:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-19 18:07:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-19 18:07:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-19 18:07:08,143 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2020-10-19 18:07:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:08,144 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-19 18:07:08,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-19 18:07:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-19 18:07:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-19 18:07:08,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:08,146 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:08,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 18:07:08,358 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:08,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2020-10-19 18:07:08,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:08,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895419158] [2020-10-19 18:07:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-19 18:07:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-10-19 18:07:08,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895419158] [2020-10-19 18:07:08,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421302733] [2020-10-19 18:07:08,763 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:08,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:08,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:08,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:07:08,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:08,884 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:08,885 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-10-19 18:07:08,886 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:08,891 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:08,894 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-19 18:07:08,894 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:09,132 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:09,133 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-10-19 18:07:09,134 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:09,139 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:09,141 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-19 18:07:09,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-19 18:07:09,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:09,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2020-10-19 18:07:09,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252920371] [2020-10-19 18:07:09,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:09,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:09,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:07:09,393 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 6 states. [2020-10-19 18:07:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:09,507 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-19 18:07:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:09,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-19 18:07:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:09,510 INFO L225 Difference]: With dead ends: 82 [2020-10-19 18:07:09,510 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:07:09,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:07:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:07:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-19 18:07:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 18:07:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-19 18:07:09,516 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2020-10-19 18:07:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:09,516 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-19 18:07:09,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-19 18:07:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-19 18:07:09,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:09,519 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:09,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:09,731 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2020-10-19 18:07:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:09,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872864162] [2020-10-19 18:07:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-19 18:07:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-19 18:07:10,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872864162] [2020-10-19 18:07:10,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471517196] [2020-10-19 18:07:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:07:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-19 18:07:10,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:10,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-19 18:07:10,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707470982] [2020-10-19 18:07:10,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-19 18:07:10,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-19 18:07:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-19 18:07:10,424 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 23 states. [2020-10-19 18:07:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:11,167 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-19 18:07:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:07:11,167 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-10-19 18:07:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:11,168 INFO L225 Difference]: With dead ends: 88 [2020-10-19 18:07:11,168 INFO L226 Difference]: Without dead ends: 85 [2020-10-19 18:07:11,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-10-19 18:07:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-19 18:07:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-19 18:07:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-19 18:07:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-19 18:07:11,173 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2020-10-19 18:07:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:11,173 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-19 18:07:11,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-19 18:07:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-19 18:07:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-19 18:07:11,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:11,174 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:11,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:11,380 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2020-10-19 18:07:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:11,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733942046] [2020-10-19 18:07:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-19 18:07:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-19 18:07:11,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733942046] [2020-10-19 18:07:11,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459092828] [2020-10-19 18:07:11,835 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:11,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:11,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 18:07:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-19 18:07:12,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:12,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-19 18:07:12,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893280285] [2020-10-19 18:07:12,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-19 18:07:12,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:12,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-19 18:07:12,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-19 18:07:12,162 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 25 states. [2020-10-19 18:07:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:12,819 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-19 18:07:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 18:07:12,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-10-19 18:07:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:12,821 INFO L225 Difference]: With dead ends: 93 [2020-10-19 18:07:12,822 INFO L226 Difference]: Without dead ends: 90 [2020-10-19 18:07:12,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-10-19 18:07:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-19 18:07:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-19 18:07:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-19 18:07:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-19 18:07:12,827 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2020-10-19 18:07:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:12,828 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-19 18:07:12,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-19 18:07:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-19 18:07:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-19 18:07:12,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:12,829 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:13,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-19 18:07:13,036 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2020-10-19 18:07:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:13,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996244363] [2020-10-19 18:07:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-19 18:07:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-19 18:07:13,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996244363] [2020-10-19 18:07:13,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862312996] [2020-10-19 18:07:13,522 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:13,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:13,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:07:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2020-10-19 18:07:13,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:13,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2020-10-19 18:07:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196492824] [2020-10-19 18:07:13,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-19 18:07:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-19 18:07:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:07:13,806 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-10-19 18:07:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:14,754 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-19 18:07:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 18:07:14,757 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-10-19 18:07:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:14,759 INFO L225 Difference]: With dead ends: 109 [2020-10-19 18:07:14,759 INFO L226 Difference]: Without dead ends: 106 [2020-10-19 18:07:14,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-10-19 18:07:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-19 18:07:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2020-10-19 18:07:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-19 18:07:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-19 18:07:14,764 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2020-10-19 18:07:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:14,765 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-19 18:07:14,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-19 18:07:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-19 18:07:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-19 18:07:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:14,767 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:14,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:14,976 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2020-10-19 18:07:14,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:14,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110364884] [2020-10-19 18:07:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-19 18:07:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-19 18:07:15,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110364884] [2020-10-19 18:07:15,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16955557] [2020-10-19 18:07:15,515 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:15,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:07:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 18:07:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-10-19 18:07:16,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:16,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-10-19 18:07:16,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316945595] [2020-10-19 18:07:16,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-19 18:07:16,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:16,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-19 18:07:16,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-19 18:07:16,033 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 29 states. [2020-10-19 18:07:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:16,957 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-10-19 18:07:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-19 18:07:16,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-10-19 18:07:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:16,959 INFO L225 Difference]: With dead ends: 107 [2020-10-19 18:07:16,959 INFO L226 Difference]: Without dead ends: 104 [2020-10-19 18:07:16,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-19 18:07:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-19 18:07:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-19 18:07:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-19 18:07:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-19 18:07:16,963 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2020-10-19 18:07:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:16,963 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-19 18:07:16,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-19 18:07:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-19 18:07:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-19 18:07:16,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:16,965 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:17,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-19 18:07:17,169 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2020-10-19 18:07:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:17,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557370627] [2020-10-19 18:07:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:17,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:17,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:17,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-19 18:07:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-10-19 18:07:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557370627] [2020-10-19 18:07:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649052351] [2020-10-19 18:07:17,793 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:17,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-19 18:07:17,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 18:07:17,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-10-19 18:07:18,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:18,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-10-19 18:07:18,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548674717] [2020-10-19 18:07:18,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-19 18:07:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:18,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-19 18:07:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-10-19 18:07:18,445 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 31 states. [2020-10-19 18:07:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:19,435 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-19 18:07:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-19 18:07:19,436 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-10-19 18:07:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:19,437 INFO L225 Difference]: With dead ends: 112 [2020-10-19 18:07:19,437 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 18:07:19,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2020-10-19 18:07:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 18:07:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-19 18:07:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-19 18:07:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-19 18:07:19,443 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2020-10-19 18:07:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:19,443 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-19 18:07:19,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-19 18:07:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-19 18:07:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-19 18:07:19,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:19,445 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:19,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-19 18:07:19,649 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2020-10-19 18:07:19,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:19,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86601586] [2020-10-19 18:07:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:19,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:19,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:20,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-19 18:07:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-19 18:07:20,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86601586] [2020-10-19 18:07:20,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639775347] [2020-10-19 18:07:20,282 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:20,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-19 18:07:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:20,336 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_30|]} [2020-10-19 18:07:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:20,341 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:07:20,342 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:20,355 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:20,361 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:07:20,363 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:20,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:20,369 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:07:20,369 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2020-10-19 18:07:20,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:20,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2020-10-19 18:07:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107454111] [2020-10-19 18:07:20,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:07:20,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:07:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-19 18:07:20,899 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 7 states. [2020-10-19 18:07:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:20,958 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-10-19 18:07:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:20,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-10-19 18:07:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:20,960 INFO L225 Difference]: With dead ends: 103 [2020-10-19 18:07:20,960 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:07:20,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-19 18:07:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:07:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:07:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:07:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:07:20,961 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2020-10-19 18:07:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:20,962 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:07:20,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:07:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:07:20,962 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:07:21,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-19 18:07:21,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:07:21 BoogieIcfgContainer [2020-10-19 18:07:21,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:07:21,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:07:21,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:07:21,171 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:07:21,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:55" (3/4) ... [2020-10-19 18:07:21,175 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:07:21,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:07:21,182 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-10-19 18:07:21,182 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:07:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-19 18:07:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-10-19 18:07:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-10-19 18:07:21,190 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:07:21,227 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:07:21,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:07:21,228 INFO L168 Benchmark]: Toolchain (without parser) took 26920.46 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 482.3 MB). Free memory was 958.6 MB in the beginning and 1.4 GB in the end (delta: -486.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:07:21,228 INFO L168 Benchmark]: CDTParser took 0.39 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 18:07:21,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.91 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 18:07:21,229 INFO L168 Benchmark]: Boogie Preprocessor took 110.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:21,230 INFO L168 Benchmark]: RCFGBuilder took 435.75 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: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:21,230 INFO L168 Benchmark]: TraceAbstraction took 26059.96 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 347.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -346.1 MB). Peak memory consumption was 967.5 kB. Max. memory is 11.5 GB. [2020-10-19 18:07:21,230 INFO L168 Benchmark]: Witness Printer took 56.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 328.6 kB). Peak memory consumption was 328.6 kB. Max. memory is 11.5 GB. [2020-10-19 18:07:21,232 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 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 247.91 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 110.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 435.75 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: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26059.96 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 347.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -346.1 MB). Peak memory consumption was 967.5 kB. Max. memory is 11.5 GB. * Witness Printer took 56.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 328.6 kB). Peak memory consumption was 328.6 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.9s, OverallIterations: 25, TraceHistogramMax: 26, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 617 SDtfs, 1841 SDslu, 3160 SDs, 0 SdLazy, 3438 SolverSat, 273 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1988 GetRequests, 1548 SyntacticMatches, 14 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 2350632 SizeOfPredicates, 32 NumberOfNonLiveVariables, 3223 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10777/18637 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 correct! Received shutdown request...