./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.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/ArraysOfVariableLength5.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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:06:48,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:06:48,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:06:48,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:06:48,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:06:48,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:06:48,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:06:48,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:06:48,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:06:48,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:06:48,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:06:48,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:06:48,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:06:48,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:06:48,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:06:48,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:06:48,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:06:48,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:06:48,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:06:48,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:06:48,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:06:48,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:06:48,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:06:48,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:06:48,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:06:48,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:06:48,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:06:48,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:06:48,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:06:48,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:06:48,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:06:48,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:06:48,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:06:48,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:06:48,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:06:48,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:06:48,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:06:48,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:06:48,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:06:48,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:06:48,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:06:48,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:06:48,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:06:48,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:06:48,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:06:48,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:06:48,172 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:06:48,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:06:48,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:06:48,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:06:48,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:06:48,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:06:48,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:06:48,174 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:06:48,174 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:06:48,174 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:06:48,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:06:48,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:06:48,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:06:48,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:06:48,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:06:48,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:06:48,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:06:48,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:06:48,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:06:48,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:06:48,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:06:48,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:06:48,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:06:48,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:06:48,179 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 -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2020-10-19 18:06:48,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:06:48,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:06:48,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:06:48,527 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:06:48,527 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:06:48,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-10-19 18:06:48,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91c25814/23bb3c3187144dce9f319de62f24da15/FLAG4f4dcd009 [2020-10-19 18:06:49,057 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:06:49,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-10-19 18:06:49,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91c25814/23bb3c3187144dce9f319de62f24da15/FLAG4f4dcd009 [2020-10-19 18:06:49,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91c25814/23bb3c3187144dce9f319de62f24da15 [2020-10-19 18:06:49,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:06:49,484 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:06:49,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:49,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:06:49,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:06:49,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e92c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49, skipping insertion in model container [2020-10-19 18:06:49,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:06:49,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:06:49,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:49,735 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:06:49,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:49,768 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:06:49,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49 WrapperNode [2020-10-19 18:06:49,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:49,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:06:49,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:06:49,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:06:49,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (1/1) ... [2020-10-19 18:06:49,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:06:49,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:06:49,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:06:49,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:06:49,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (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 18:06:49,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:06:49,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:06:49,950 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:06:49,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:06:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:06:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:06:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:06:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:06:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:06:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:06:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:06:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:06:50,257 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:06:50,257 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:06:50,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:50 BoogieIcfgContainer [2020-10-19 18:06:50,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:06:50,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:06:50,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:06:50,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:06:50,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:06:49" (1/3) ... [2020-10-19 18:06:50,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678643a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:50, skipping insertion in model container [2020-10-19 18:06:50,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:49" (2/3) ... [2020-10-19 18:06:50,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678643a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:50, skipping insertion in model container [2020-10-19 18:06:50,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:50" (3/3) ... [2020-10-19 18:06:50,271 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-10-19 18:06:50,284 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:06:50,293 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-19 18:06:50,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-19 18:06:50,348 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:06:50,348 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:06:50,349 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:06:50,349 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:06:50,350 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:06:50,350 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:06:50,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:06:50,351 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:06:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-19 18:06:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:06:50,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:50,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:50,387 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 18:06:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-10-19 18:06:50,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:50,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200033642] [2020-10-19 18:06:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,642 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 18:06:50,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200033642] [2020-10-19 18:06:50,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:50,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:06:50,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147747563] [2020-10-19 18:06:50,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:50,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:50,669 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-19 18:06:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:50,866 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:06:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:50,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:06:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:50,880 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:06:50,881 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:06:50,883 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 18:06:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:06:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-19 18:06:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 18:06:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-19 18:06:50,936 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-10-19 18:06:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:50,937 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-19 18:06:50,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-19 18:06:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:06:50,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:50,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:50,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:06:50,940 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 18:06:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:50,940 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-10-19 18:06:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:50,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172978331] [2020-10-19 18:06:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,033 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 18:06:51,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172978331] [2020-10-19 18:06:51,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:51,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:06:51,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307352167] [2020-10-19 18:06:51,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:51,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:51,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:51,039 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 6 states. [2020-10-19 18:06:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:51,232 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-19 18:06:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:51,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-19 18:06:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:51,235 INFO L225 Difference]: With dead ends: 59 [2020-10-19 18:06:51,236 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 18:06:51,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 18:06:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-10-19 18:06:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 18:06:51,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2020-10-19 18:06:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:51,247 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 18:06:51,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 18:06:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:06:51,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:51,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:51,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:06:51,250 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 18:06:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:51,251 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-10-19 18:06:51,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:51,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442700945] [2020-10-19 18:06:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,363 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 18:06:51,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442700945] [2020-10-19 18:06:51,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:51,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:51,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168350497] [2020-10-19 18:06:51,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:51,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:51,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:51,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:51,373 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-10-19 18:06:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:51,468 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-19 18:06:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:51,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-19 18:06:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:51,472 INFO L225 Difference]: With dead ends: 43 [2020-10-19 18:06:51,472 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:06:51,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:06:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-19 18:06:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-19 18:06:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-19 18:06:51,480 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2020-10-19 18:06:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:51,480 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-19 18:06:51,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-19 18:06:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:06:51,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:51,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:51,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:06:51,482 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 18:06:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2020-10-19 18:06:51,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:51,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240838652] [2020-10-19 18:06:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,570 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 18:06:51,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240838652] [2020-10-19 18:06:51,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:51,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:51,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326209064] [2020-10-19 18:06:51,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:51,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:51,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:51,573 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-10-19 18:06:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:51,672 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-19 18:06:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:51,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-19 18:06:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:51,674 INFO L225 Difference]: With dead ends: 47 [2020-10-19 18:06:51,674 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 18:06:51,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 18:06:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-19 18:06:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 18:06:51,682 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2020-10-19 18:06:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:51,682 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 18:06:51,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 18:06:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:06:51,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:51,684 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, 1] [2020-10-19 18:06:51,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:06:51,685 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 18:06:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2020-10-19 18:06:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:51,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169166191] [2020-10-19 18:06:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,755 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 18:06:51,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169166191] [2020-10-19 18:06:51,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723093302] [2020-10-19 18:06:51,757 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 18:06:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:06:51,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:51,903 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 18:06:51,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:51,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 18:06:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920119034] [2020-10-19 18:06:51,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:51,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:51,907 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 6 states. [2020-10-19 18:06:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:52,049 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-10-19 18:06:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:52,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-19 18:06:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:52,052 INFO L225 Difference]: With dead ends: 69 [2020-10-19 18:06:52,052 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:06:52,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:06:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-19 18:06:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 18:06:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-19 18:06:52,063 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2020-10-19 18:06:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:52,064 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-19 18:06:52,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-19 18:06:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:06:52,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:52,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:52,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:52,281 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 18:06:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2020-10-19 18:06:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:52,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764269140] [2020-10-19 18:06:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-19 18:06:52,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764269140] [2020-10-19 18:06:52,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:52,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:52,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915171021] [2020-10-19 18:06:52,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:52,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:52,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:52,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:52,344 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 4 states. [2020-10-19 18:06:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:52,436 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-19 18:06:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:52,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:06:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:52,439 INFO L225 Difference]: With dead ends: 62 [2020-10-19 18:06:52,439 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 18:06:52,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 18:06:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 18:06:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-19 18:06:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:06:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-19 18:06:52,446 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2020-10-19 18:06:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:52,447 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-19 18:06:52,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-19 18:06:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:06:52,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:52,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:52,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:06:52,450 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 18:06:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2020-10-19 18:06:52,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:52,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898218814] [2020-10-19 18:06:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898218814] [2020-10-19 18:06:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016590922] [2020-10-19 18:06:52,540 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 18:06:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:06:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:52,648 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 18:06:52,649 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 18:06:52,650 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:52,655 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:52,658 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 18:06:52,658 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-10-19 18:06:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:52,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:52,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-19 18:06:52,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712421682] [2020-10-19 18:06:52,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:06:52,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:06:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:52,713 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 8 states. [2020-10-19 18:06:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:52,846 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-19 18:06:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:06:52,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-19 18:06:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:52,848 INFO L225 Difference]: With dead ends: 53 [2020-10-19 18:06:52,849 INFO L226 Difference]: Without dead ends: 53 [2020-10-19 18:06:52,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-19 18:06:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-19 18:06:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-19 18:06:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-19 18:06:52,855 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2020-10-19 18:06:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:52,856 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-19 18:06:52,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:06:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-19 18:06:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:06:52,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:52,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:53,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:53,073 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 18:06:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2020-10-19 18:06:53,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:53,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24931304] [2020-10-19 18:06:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:53,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24931304] [2020-10-19 18:06:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75466214] [2020-10-19 18:06:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:06:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 18:06:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:53,244 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:53,245 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-10-19 18:06:53,245 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:53,278 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-10-19 18:06:53,286 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:53,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-10-19 18:06:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:53,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:53,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-19 18:06:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486599382] [2020-10-19 18:06:53,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:06:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:06:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:53,373 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 8 states. [2020-10-19 18:06:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:53,563 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-19 18:06:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:06:53,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-19 18:06:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:53,565 INFO L225 Difference]: With dead ends: 59 [2020-10-19 18:06:53,565 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 18:06:53,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 18:06:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-19 18:06:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:06:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-19 18:06:53,572 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2020-10-19 18:06:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:53,573 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-19 18:06:53,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:06:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-19 18:06:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:06:53,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:53,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:53,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:53,777 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 18:06:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2020-10-19 18:06:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:53,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392777537] [2020-10-19 18:06:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:53,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392777537] [2020-10-19 18:06:53,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369447384] [2020-10-19 18:06:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:06:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-10-19 18:06:54,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293580008] [2020-10-19 18:06:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:54,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:54,025 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2020-10-19 18:06:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:54,144 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-19 18:06:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:54,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-19 18:06:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:54,145 INFO L225 Difference]: With dead ends: 63 [2020-10-19 18:06:54,145 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 18:06:54,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 18:06:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-19 18:06:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:06:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-19 18:06:54,151 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2020-10-19 18:06:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:54,151 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-19 18:06:54,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-19 18:06:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:06:54,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:54,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:54,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:54,363 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 18:06:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:54,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2020-10-19 18:06:54,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:54,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282509422] [2020-10-19 18:06:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:54,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282509422] [2020-10-19 18:06:54,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097233054] [2020-10-19 18:06:54,489 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 18:06:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:06:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:54,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:54,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-19 18:06:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102163340] [2020-10-19 18:06:54,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:06:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:06:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:54,644 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 11 states. [2020-10-19 18:06:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:55,076 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-19 18:06:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:06:55,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-19 18:06:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:55,078 INFO L225 Difference]: With dead ends: 81 [2020-10-19 18:06:55,078 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 18:06:55,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:06:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 18:06:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-10-19 18:06:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 18:06:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-19 18:06:55,097 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2020-10-19 18:06:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:55,097 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-19 18:06:55,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:06:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-19 18:06:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:06:55,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:55,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:55,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-19 18:06:55,318 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 18:06:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2020-10-19 18:06:55,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:55,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19070406] [2020-10-19 18:06:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:55,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19070406] [2020-10-19 18:06:55,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697239372] [2020-10-19 18:06:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:06:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 18:06:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:55,531 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_25|]} [2020-10-19 18:06:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:55,537 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 18:06:55,537 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:55,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:55,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:55,555 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 18:06:55,556 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:55,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:55,564 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:55,564 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-10-19 18:06:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:55,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:55,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2020-10-19 18:06:55,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945784759] [2020-10-19 18:06:55,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:06:55,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:06:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:55,736 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 10 states. [2020-10-19 18:06:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:55,954 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-19 18:06:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:06:55,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-19 18:06:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:55,955 INFO L225 Difference]: With dead ends: 69 [2020-10-19 18:06:55,955 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:06:55,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:06:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-19 18:06:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-19 18:06:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-19 18:06:55,960 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 31 [2020-10-19 18:06:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:55,960 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-19 18:06:55,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:06:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-19 18:06:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-19 18:06:55,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:55,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:56,173 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 18:06:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash 894123677, now seen corresponding path program 1 times [2020-10-19 18:06:56,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500824070] [2020-10-19 18:06:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 18:06:56,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500824070] [2020-10-19 18:06:56,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668799495] [2020-10-19 18:06:56,251 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 18:06:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:06:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:56,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:56,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-19 18:06:56,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493413602] [2020-10-19 18:06:56,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:06:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:06:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:56,347 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 9 states. [2020-10-19 18:06:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:56,553 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-10-19 18:06:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:06:56,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-19 18:06:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:56,555 INFO L225 Difference]: With dead ends: 94 [2020-10-19 18:06:56,555 INFO L226 Difference]: Without dead ends: 94 [2020-10-19 18:06:56,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-19 18:06:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-10-19 18:06:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-19 18:06:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-19 18:06:56,560 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 37 [2020-10-19 18:06:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:56,560 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-19 18:06:56,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:06:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-19 18:06:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-19 18:06:56,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:56,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:56,774 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 18:06:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2020-10-19 18:06:56,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264924593] [2020-10-19 18:06:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-19 18:06:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264924593] [2020-10-19 18:06:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233779843] [2020-10-19 18:06:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:56,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:06:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:06:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:57,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:57,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2020-10-19 18:06:57,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285071803] [2020-10-19 18:06:57,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:06:57,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:06:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:57,003 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 11 states. [2020-10-19 18:06:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:57,393 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-19 18:06:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:06:57,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-19 18:06:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:57,395 INFO L225 Difference]: With dead ends: 124 [2020-10-19 18:06:57,395 INFO L226 Difference]: Without dead ends: 124 [2020-10-19 18:06:57,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:06:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-19 18:06:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2020-10-19 18:06:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-19 18:06:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-19 18:06:57,402 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 43 [2020-10-19 18:06:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:57,403 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-19 18:06:57,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:06:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-19 18:06:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-19 18:06:57,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:57,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:57,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-19 18:06:57,623 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 18:06:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2020-10-19 18:06:57,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:57,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210488750] [2020-10-19 18:06:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-19 18:06:57,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210488750] [2020-10-19 18:06:57,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894533130] [2020-10-19 18:06:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:06:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-19 18:06:57,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:57,806 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:57,806 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-10-19 18:06:57,807 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:57,825 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-10-19 18:06:57,827 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:57,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-10-19 18:06:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-19 18:06:57,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:57,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2020-10-19 18:06:57,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057165990] [2020-10-19 18:06:57,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:06:57,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:06:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:57,939 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 12 states. [2020-10-19 18:06:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:58,208 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2020-10-19 18:06:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:06:58,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-19 18:06:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:58,210 INFO L225 Difference]: With dead ends: 116 [2020-10-19 18:06:58,210 INFO L226 Difference]: Without dead ends: 116 [2020-10-19 18:06:58,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:06:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-19 18:06:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-19 18:06:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-19 18:06:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-10-19 18:06:58,218 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 44 [2020-10-19 18:06:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:58,218 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-10-19 18:06:58,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:06:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-10-19 18:06:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 18:06:58,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:58,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:58,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:58,434 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 18:06:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:58,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2073773289, now seen corresponding path program 2 times [2020-10-19 18:06:58,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:58,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133163231] [2020-10-19 18:06:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:06:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-19 18:06:58,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133163231] [2020-10-19 18:06:58,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543085380] [2020-10-19 18:06:58,522 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 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 18:06:58,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:06:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:06:58,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-19 18:06:58,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:58,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-10-19 18:06:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50803784] [2020-10-19 18:06:58,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:06:58,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:06:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:58,636 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 12 states. [2020-10-19 18:06:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:58,973 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-19 18:06:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:06:58,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-19 18:06:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:58,974 INFO L225 Difference]: With dead ends: 115 [2020-10-19 18:06:58,974 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 18:06:58,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:06:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 18:06:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-19 18:06:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-19 18:06:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2020-10-19 18:06:58,986 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 47 [2020-10-19 18:06:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:58,987 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2020-10-19 18:06:58,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:06:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2020-10-19 18:06:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-19 18:06:58,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:58,989 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:59,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 18:06:59,191 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 18:06:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:59,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1381084076, now seen corresponding path program 3 times [2020-10-19 18:06:59,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:59,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761276207] [2020-10-19 18:06:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:06:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-19 18:06:59,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761276207] [2020-10-19 18:06:59,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742647104] [2020-10-19 18:06:59,319 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 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 18:06:59,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:06:59,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:59,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 18:06:59,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:59,373 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_26|]} [2020-10-19 18:06:59,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:59,378 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 18:06:59,379 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:59,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:59,396 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 18:06:59,397 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:59,402 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:59,402 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:59,403 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2020-10-19 18:06:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-19 18:06:59,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:59,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2020-10-19 18:06:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67006879] [2020-10-19 18:06:59,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:06:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:06:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:59,650 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 12 states. [2020-10-19 18:07:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:00,423 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-19 18:07:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-19 18:07:00,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-19 18:07:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:00,427 INFO L225 Difference]: With dead ends: 116 [2020-10-19 18:07:00,427 INFO L226 Difference]: Without dead ends: 116 [2020-10-19 18:07:00,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-19 18:07:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-19 18:07:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-10-19 18:07:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-19 18:07:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-10-19 18:07:00,433 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 52 [2020-10-19 18:07:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:00,433 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-10-19 18:07:00,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:07:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-10-19 18:07:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-19 18:07:00,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:00,434 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:00,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 18:07:00,647 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 18:07:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1868655978, now seen corresponding path program 3 times [2020-10-19 18:07:00,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:00,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327790901] [2020-10-19 18:07:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:07:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:07:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 76 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-19 18:07:00,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327790901] [2020-10-19 18:07:00,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324783575] [2020-10-19 18:07:00,814 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 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 18:07:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-19 18:07:00,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:00,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2020-10-19 18:07:00,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406553887] [2020-10-19 18:07:00,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-19 18:07:00,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-19 18:07:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:07:00,977 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 18 states. [2020-10-19 18:07:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:01,629 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2020-10-19 18:07:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-19 18:07:01,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-10-19 18:07:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:01,632 INFO L225 Difference]: With dead ends: 154 [2020-10-19 18:07:01,632 INFO L226 Difference]: Without dead ends: 154 [2020-10-19 18:07:01,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2020-10-19 18:07:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-19 18:07:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2020-10-19 18:07:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-19 18:07:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2020-10-19 18:07:01,642 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 74 [2020-10-19 18:07:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:01,643 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2020-10-19 18:07:01,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-19 18:07:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2020-10-19 18:07:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-19 18:07:01,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:01,645 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:01,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 18:07:01,846 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 18:07:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:01,847 INFO L82 PathProgramCache]: Analyzing trace with hash 241209475, now seen corresponding path program 1 times [2020-10-19 18:07:01,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:01,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224492128] [2020-10-19 18:07:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:07:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:07:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-19 18:07:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-19 18:07:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 97 proven. 49 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-19 18:07:01,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224492128] [2020-10-19 18:07:01,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066022181] [2020-10-19 18:07:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:07:02,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-19 18:07:02,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:02,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-10-19 18:07:02,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985779306] [2020-10-19 18:07:02,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 18:07:02,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 18:07:02,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:07:02,149 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 15 states. [2020-10-19 18:07:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,564 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-10-19 18:07:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 18:07:02,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 103 [2020-10-19 18:07:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,566 INFO L225 Difference]: With dead ends: 161 [2020-10-19 18:07:02,566 INFO L226 Difference]: Without dead ends: 155 [2020-10-19 18:07:02,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-19 18:07:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-19 18:07:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2020-10-19 18:07:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-19 18:07:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2020-10-19 18:07:02,577 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 103 [2020-10-19 18:07:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,577 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2020-10-19 18:07:02,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 18:07:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2020-10-19 18:07:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-19 18:07:02,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:02,583 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 18:07:02,784 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 18:07:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash -311092151, now seen corresponding path program 2 times [2020-10-19 18:07:02,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877972786] [2020-10-19 18:07:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:07:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:07:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-19 18:07:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-19 18:07:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-19 18:07:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877972786] [2020-10-19 18:07:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835669450] [2020-10-19 18:07:02,896 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 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 18:07:02,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:02,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:07:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:02,995 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:02,995 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 18:07:02,997 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:03,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:03,006 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 18:07:03,006 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:03,085 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:03,086 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 18:07:03,088 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:03,102 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:03,104 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 18:07:03,104 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:03,192 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:03,193 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 18:07:03,194 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:03,200 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:03,201 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 18:07:03,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:03,306 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:03,306 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 18:07:03,308 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:03,313 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:03,315 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 18:07:03,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:03,430 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:03,431 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 18:07:03,432 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:03,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:03,439 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 18:07:03,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-10-19 18:07:03,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:03,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2020-10-19 18:07:03,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27982646] [2020-10-19 18:07:03,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:07:03,593 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand 6 states. [2020-10-19 18:07:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:03,680 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-19 18:07:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:03,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-10-19 18:07:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:03,681 INFO L225 Difference]: With dead ends: 138 [2020-10-19 18:07:03,681 INFO L226 Difference]: Without dead ends: 135 [2020-10-19 18:07:03,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:07:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-19 18:07:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-19 18:07:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-19 18:07:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-19 18:07:03,686 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 113 [2020-10-19 18:07:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:03,686 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-19 18:07:03,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-19 18:07:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-19 18:07:03,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:03,688 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:03,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:03,898 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 18:07:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash 419498507, now seen corresponding path program 1 times [2020-10-19 18:07:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:03,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450209409] [2020-10-19 18:07:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:07:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:07:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-19 18:07:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-19 18:07:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-10-19 18:07:04,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450209409] [2020-10-19 18:07:04,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800285673] [2020-10-19 18:07:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:07:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-19 18:07:04,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:04,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2020-10-19 18:07:04,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656665799] [2020-10-19 18:07:04,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-19 18:07:04,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:04,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-19 18:07:04,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-19 18:07:04,304 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 19 states. [2020-10-19 18:07:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:05,121 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2020-10-19 18:07:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 18:07:05,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2020-10-19 18:07:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:05,124 INFO L225 Difference]: With dead ends: 170 [2020-10-19 18:07:05,124 INFO L226 Difference]: Without dead ends: 167 [2020-10-19 18:07:05,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2020-10-19 18:07:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-19 18:07:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2020-10-19 18:07:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-19 18:07:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-10-19 18:07:05,133 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 126 [2020-10-19 18:07:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:05,133 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-10-19 18:07:05,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-19 18:07:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-10-19 18:07:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-19 18:07:05,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:05,137 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:05,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:05,351 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 18:07:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:05,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1289574162, now seen corresponding path program 2 times [2020-10-19 18:07:05,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:05,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066442051] [2020-10-19 18:07:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:07:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:07:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-19 18:07:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-19 18:07:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-19 18:07:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2020-10-19 18:07:05,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066442051] [2020-10-19 18:07:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696855155] [2020-10-19 18:07:05,511 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 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 18:07:05,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:05,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:05,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 18:07:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-10-19 18:07:05,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:05,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2020-10-19 18:07:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023713805] [2020-10-19 18:07:05,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-19 18:07:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-19 18:07:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-19 18:07:05,802 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 22 states. [2020-10-19 18:07:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:06,703 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2020-10-19 18:07:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-19 18:07:06,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 162 [2020-10-19 18:07:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:06,706 INFO L225 Difference]: With dead ends: 220 [2020-10-19 18:07:06,707 INFO L226 Difference]: Without dead ends: 220 [2020-10-19 18:07:06,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2020-10-19 18:07:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-19 18:07:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 179. [2020-10-19 18:07:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-19 18:07:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2020-10-19 18:07:06,716 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 162 [2020-10-19 18:07:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:06,717 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2020-10-19 18:07:06,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-19 18:07:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2020-10-19 18:07:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-19 18:07:06,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:06,721 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:06,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:06,935 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 18:07:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1415289466, now seen corresponding path program 3 times [2020-10-19 18:07:06,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:06,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006311622] [2020-10-19 18:07:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:07:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:07:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-19 18:07:07,088 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 81 [2020-10-19 18:07:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-19 18:07:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-19 18:07:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-10-19 18:07:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006311622] [2020-10-19 18:07:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166877002] [2020-10-19 18:07:07,197 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 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 18:07:07,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:07,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:07,288 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_29|]} [2020-10-19 18:07:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:07,294 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 18:07:07,294 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:07,306 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:07,312 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 18:07:07,313 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:07,322 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:07,323 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 18:07:07,323 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2020-10-19 18:07:08,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:08,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-10-19 18:07:08,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462556789] [2020-10-19 18:07:08,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:07:08,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:07:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:07:08,088 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand 7 states. [2020-10-19 18:07:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:08,158 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2020-10-19 18:07:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:08,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-19 18:07:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:08,159 INFO L225 Difference]: With dead ends: 178 [2020-10-19 18:07:08,159 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:07:08,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:07:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:07:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:07:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:07:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:07:08,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 203 [2020-10-19 18:07:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:08,161 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:07:08,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:07:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:07:08,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:07:08,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-19 18:07:08,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:07:08 BoogieIcfgContainer [2020-10-19 18:07:08,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:07:08,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:07:08,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:07:08,369 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:07:08,369 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:50" (3/4) ... [2020-10-19 18:07:08,373 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:07:08,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:07:08,382 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-10-19 18:07:08,382 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:07:08,388 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-19 18:07:08,388 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-10-19 18:07:08,388 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-10-19 18:07:08,388 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:07:08,437 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:07:08,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:07:08,439 INFO L168 Benchmark]: Toolchain (without parser) took 18961.37 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 358.1 MB). Free memory was 960.0 MB in the beginning and 1.0 GB in the end (delta: -86.2 MB). Peak memory consumption was 271.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:08,440 INFO L168 Benchmark]: CDTParser took 0.31 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 18:07:08,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.84 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 947.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:08,440 INFO L168 Benchmark]: Boogie Preprocessor took 104.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:08,441 INFO L168 Benchmark]: RCFGBuilder took 386.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:08,441 INFO L168 Benchmark]: TraceAbstraction took 18106.46 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 222.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.9 MB). Peak memory consumption was 281.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:08,442 INFO L168 Benchmark]: Witness Printer took 69.49 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2020-10-19 18:07:08,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 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 283.84 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 947.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 104.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 386.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18106.46 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 222.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.9 MB). Peak memory consumption was 281.2 MB. Max. memory is 11.5 GB. * Witness Printer took 69.49 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 24 B). Peak memory consumption was 24 B. 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: 18.0s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 524 SDtfs, 1946 SDslu, 1229 SDs, 0 SdLazy, 4271 SolverSat, 461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1529 GetRequests, 1203 SyntacticMatches, 34 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=21, 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, 22 MinimizatonAttempts, 285 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 2383 NumberOfCodeBlocks, 2037 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2344 ConstructedInterpolants, 342 QuantifiedInterpolants, 1215622 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2879 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 39 InterpolantComputations, 8 PerfectInterpolantSequences, 6271/6862 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...