./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.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/ArraysWithLenghtAtDeclaration.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 56b28f59847d63942ec468b0c95f39e5b8c0763a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:06:59,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:06:59,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:06:59,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:06:59,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:06:59,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:06:59,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:06:59,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:06:59,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:06:59,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:06:59,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:06:59,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:06:59,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:06:59,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:06:59,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:06:59,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:06:59,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:06:59,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:06:59,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:06:59,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:06:59,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:06:59,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:06:59,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:06:59,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:06:59,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:06:59,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:06:59,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:06:59,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:06:59,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:06:59,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:06:59,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:06:59,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:06:59,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:06:59,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:06:59,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:06:59,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:06:59,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:06:59,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:06:59,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:06:59,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:06:59,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:06:59,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:06:59,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:06:59,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:06:59,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:06:59,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:06:59,686 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:06:59,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:06:59,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:06:59,687 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:06:59,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:06:59,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:06:59,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:06:59,689 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:06:59,689 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:06:59,690 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:06:59,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:06:59,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:06:59,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:06:59,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:06:59,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:06:59,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:06:59,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:06:59,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:06:59,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:06:59,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:06:59,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:06:59,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:06:59,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:06:59,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:06:59,694 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 -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2020-10-19 18:07:00,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:07:00,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:07:00,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:07:00,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:07:00,025 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:07:00,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-10-19 18:07:00,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e67353073/b0f06e39f5024f4cbf604817b6abc800/FLAG20dcf006c [2020-10-19 18:07:00,573 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:07:00,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-10-19 18:07:00,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e67353073/b0f06e39f5024f4cbf604817b6abc800/FLAG20dcf006c [2020-10-19 18:07:00,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e67353073/b0f06e39f5024f4cbf604817b6abc800 [2020-10-19 18:07:00,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:07:00,979 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:07:00,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:07:00,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:07:00,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:07:00,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:07:00" (1/1) ... [2020-10-19 18:07:00,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0f34e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:00, skipping insertion in model container [2020-10-19 18:07:00,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:07:00" (1/1) ... [2020-10-19 18:07:00,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:07:01,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:07:01,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:07:01,203 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:07:01,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:07:01,239 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:07:01,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01 WrapperNode [2020-10-19 18:07:01,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:07:01,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:07:01,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:07:01,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:07:01,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (1/1) ... [2020-10-19 18:07:01,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:07:01,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:07:01,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:07:01,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:07:01,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (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 18:07:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:07:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:07:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:07:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:07:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:07:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:07:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:07:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:07:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:07:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:07:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:07:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:07:01,641 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:07:01,641 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:07:01,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:07:01 BoogieIcfgContainer [2020-10-19 18:07:01,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:07:01,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:07:01,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:07:01,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:07:01,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:07:00" (1/3) ... [2020-10-19 18:07:01,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702b1f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:07:01, skipping insertion in model container [2020-10-19 18:07:01,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:07:01" (2/3) ... [2020-10-19 18:07:01,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702b1f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:07:01, skipping insertion in model container [2020-10-19 18:07:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:07:01" (3/3) ... [2020-10-19 18:07:01,655 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2020-10-19 18:07:01,687 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:07:01,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-19 18:07:01,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-19 18:07:01,768 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:07:01,769 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:07:01,769 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:07:01,769 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:07:01,769 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:07:01,770 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:07:01,770 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:07:01,770 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:07:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-19 18:07:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:07:01,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:01,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:01,796 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 18:07:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-10-19 18:07:01,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:01,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136749519] [2020-10-19 18:07:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,002 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 18:07:02,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136749519] [2020-10-19 18:07:02,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:02,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:07:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126754966] [2020-10-19 18:07:02,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:07:02,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:07:02,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:07:02,029 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-19 18:07:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,211 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:07:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:07:02,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:07:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,223 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:07:02,223 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:07:02,225 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 18:07:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:07:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-19 18:07:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 18:07:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-19 18:07:02,269 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-10-19 18:07:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,270 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-19 18:07:02,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:07:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-19 18:07:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:07:02,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:02,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:07:02,272 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 18:07:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-10-19 18:07:02,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431905976] [2020-10-19 18:07:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,327 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 18:07:02,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431905976] [2020-10-19 18:07:02,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:02,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:07:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545981462] [2020-10-19 18:07:02,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:07:02,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:07:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:07:02,332 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-10-19 18:07:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,431 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-19 18:07:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:07:02,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 18:07:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,435 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:07:02,435 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:07:02,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:07:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:07:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-19 18:07:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:07:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 18:07:02,443 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-10-19 18:07:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,444 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 18:07:02,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:07:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 18:07:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:07:02,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:02,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:07:02,446 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 18:07:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-10-19 18:07:02,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992659442] [2020-10-19 18:07:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,520 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 18:07:02,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992659442] [2020-10-19 18:07:02,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:02,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:07:02,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135020470] [2020-10-19 18:07:02,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:02,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:02,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:07:02,524 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-10-19 18:07:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,657 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-19 18:07:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:02,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-19 18:07:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,659 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:07:02,659 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 18:07:02,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 18:07:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 18:07:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 18:07:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 18:07:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-19 18:07:02,666 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-10-19 18:07:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,666 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-19 18:07:02,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-19 18:07:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:07:02,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:02,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:07:02,668 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 18:07:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-10-19 18:07:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044296352] [2020-10-19 18:07:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,758 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 18:07:02,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044296352] [2020-10-19 18:07:02,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:02,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:07:02,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141884743] [2020-10-19 18:07:02,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:07:02,761 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-19 18:07:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,918 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-19 18:07:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:02,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-19 18:07:02,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,920 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:07:02,920 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 18:07:02,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 18:07:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 18:07:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-19 18:07:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:07:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 18:07:02,928 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-10-19 18:07:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,928 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 18:07:02,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 18:07:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:07:02,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:02,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:07:02,931 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 18:07:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-10-19 18:07:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774838478] [2020-10-19 18:07:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,034 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 18:07:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774838478] [2020-10-19 18:07:03,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:03,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:07:03,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204364489] [2020-10-19 18:07:03,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:07:03,039 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-10-19 18:07:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:03,208 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-19 18:07:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:03,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-19 18:07:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:03,210 INFO L225 Difference]: With dead ends: 61 [2020-10-19 18:07:03,210 INFO L226 Difference]: Without dead ends: 61 [2020-10-19 18:07:03,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 18:07:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-19 18:07:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-10-19 18:07:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:07:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-19 18:07:03,218 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 15 [2020-10-19 18:07:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:03,218 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-19 18:07:03,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-19 18:07:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:07:03,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:03,220 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:03,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:07:03,221 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 18:07:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-10-19 18:07:03,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:03,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52902641] [2020-10-19 18:07:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:07:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52902641] [2020-10-19 18:07:03,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450178849] [2020-10-19 18:07:03,301 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 18:07:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:07:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:07:03,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:03,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-10-19 18:07:03,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119429316] [2020-10-19 18:07:03,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:03,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:03,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:03,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:07:03,473 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 6 states. [2020-10-19 18:07:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:03,599 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-19 18:07:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:03,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-19 18:07:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:03,601 INFO L225 Difference]: With dead ends: 72 [2020-10-19 18:07:03,601 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:07:03,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:07:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:07:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-19 18:07:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 18:07:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-19 18:07:03,607 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-10-19 18:07:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:03,608 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-19 18:07:03,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-19 18:07:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:07:03,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:03,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:03,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-19 18:07:03,822 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 18:07:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:03,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-10-19 18:07:03,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:03,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407125102] [2020-10-19 18:07:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:07:03,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407125102] [2020-10-19 18:07:03,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:03,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:07:03,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779697630] [2020-10-19 18:07:03,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:07:03,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:03,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:07:03,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:07:03,886 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-10-19 18:07:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:03,948 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-19 18:07:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:07:03,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:07:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:03,949 INFO L225 Difference]: With dead ends: 50 [2020-10-19 18:07:03,949 INFO L226 Difference]: Without dead ends: 50 [2020-10-19 18:07:03,950 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 18:07:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-19 18:07:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-19 18:07:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-19 18:07:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-19 18:07:03,955 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 20 [2020-10-19 18:07:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:03,956 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-19 18:07:03,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:07:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-19 18:07:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:07:03,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:03,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:03,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:07:03,958 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 18:07:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234190, now seen corresponding path program 1 times [2020-10-19 18:07:03,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:03,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742177100] [2020-10-19 18:07:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:07:04,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742177100] [2020-10-19 18:07:04,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:04,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:07:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458450346] [2020-10-19 18:07:04,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:07:04,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:07:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:07:04,028 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-10-19 18:07:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:04,098 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-19 18:07:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:07:04,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:07:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:04,099 INFO L225 Difference]: With dead ends: 54 [2020-10-19 18:07:04,099 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:07:04,100 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 18:07:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:07:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-19 18:07:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 18:07:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-19 18:07:04,105 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 20 [2020-10-19 18:07:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:04,105 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-19 18:07:04,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:07:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-19 18:07:04,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:07:04,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:04,106 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, 1, 1, 1, 1, 1] [2020-10-19 18:07:04,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:07:04,107 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 18:07:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:04,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2011781567, now seen corresponding path program 1 times [2020-10-19 18:07:04,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:04,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518014854] [2020-10-19 18:07:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:07:04,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518014854] [2020-10-19 18:07:04,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408422736] [2020-10-19 18:07:04,151 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 18:07:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:07:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:07:04,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:04,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 18:07:04,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388188893] [2020-10-19 18:07:04,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:07:04,231 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 6 states. [2020-10-19 18:07:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:04,335 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-19 18:07:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:07:04,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-19 18:07:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:04,342 INFO L225 Difference]: With dead ends: 76 [2020-10-19 18:07:04,343 INFO L226 Difference]: Without dead ends: 76 [2020-10-19 18:07:04,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 18:07:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-19 18:07:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-10-19 18:07:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 18:07:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-19 18:07:04,349 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 26 [2020-10-19 18:07:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:04,349 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-19 18:07:04,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-19 18:07:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:07:04,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:04,351 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 18:07:04,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:04,564 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 18:07:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1143280978, now seen corresponding path program 1 times [2020-10-19 18:07:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:04,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907866712] [2020-10-19 18:07:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:07:04,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907866712] [2020-10-19 18:07:04,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897875737] [2020-10-19 18:07:04,712 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 18:07:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:07:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:07:04,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:04,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-10-19 18:07:04,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905362098] [2020-10-19 18:07:04,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:04,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:04,874 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 6 states. [2020-10-19 18:07:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:04,985 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-19 18:07:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:04,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-19 18:07:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:04,986 INFO L225 Difference]: With dead ends: 68 [2020-10-19 18:07:04,986 INFO L226 Difference]: Without dead ends: 65 [2020-10-19 18:07:04,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-19 18:07:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-10-19 18:07:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 18:07:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-19 18:07:04,997 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2020-10-19 18:07:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:04,997 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-19 18:07:04,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-19 18:07:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:07:04,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:04,998 INFO L422 BasicCegarLoop]: trace histogram [3, 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 18:07:05,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-19 18:07:05,200 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 18:07:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1735380924, now seen corresponding path program 1 times [2020-10-19 18:07:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:05,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614112922] [2020-10-19 18:07:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 18:07:05,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614112922] [2020-10-19 18:07:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643680720] [2020-10-19 18:07:05,249 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 18:07:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:07:05,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 18:07:05,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:05,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-10-19 18:07:05,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186898355] [2020-10-19 18:07:05,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:07:05,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:07:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:07:05,333 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 5 states. [2020-10-19 18:07:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:05,427 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-19 18:07:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:07:05,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-19 18:07:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:05,429 INFO L225 Difference]: With dead ends: 70 [2020-10-19 18:07:05,429 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 18:07:05,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:07:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 18:07:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-19 18:07:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-19 18:07:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-19 18:07:05,434 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 32 [2020-10-19 18:07:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:05,435 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-19 18:07:05,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:07:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-19 18:07:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:07:05,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:05,436 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:05,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:05,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2037766250, now seen corresponding path program 1 times [2020-10-19 18:07:05,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:05,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947657961] [2020-10-19 18:07:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 18:07:05,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947657961] [2020-10-19 18:07:05,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:07:05,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:07:05,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807953075] [2020-10-19 18:07:05,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:07:05,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:07:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:07:05,775 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 7 states. [2020-10-19 18:07:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:05,903 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-19 18:07:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:05,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-19 18:07:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:05,905 INFO L225 Difference]: With dead ends: 62 [2020-10-19 18:07:05,905 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 18:07:05,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 18:07:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-19 18:07:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 18:07:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-19 18:07:05,910 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2020-10-19 18:07:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:05,911 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-19 18:07:05,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:07:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-19 18:07:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 18:07:05,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:05,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:05,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:07:05,913 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1978883467, now seen corresponding path program 2 times [2020-10-19 18:07:05,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:05,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414826020] [2020-10-19 18:07:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:07:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414826020] [2020-10-19 18:07:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229235271] [2020-10-19 18:07:05,998 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:06,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:06,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:07:06,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:06,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-19 18:07:06,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780534765] [2020-10-19 18:07:06,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:07:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:07:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:07:06,106 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-10-19 18:07:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:06,359 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-19 18:07:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:07:06,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-19 18:07:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:06,361 INFO L225 Difference]: With dead ends: 72 [2020-10-19 18:07:06,361 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:07:06,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:07:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:07:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-19 18:07:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 18:07:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-19 18:07:06,365 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2020-10-19 18:07:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:06,366 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-19 18:07:06,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:07:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-19 18:07:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-19 18:07:06,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:06,367 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:06,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-19 18:07:06,579 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:06,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1601507541, now seen corresponding path program 2 times [2020-10-19 18:07:06,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:06,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54347480] [2020-10-19 18:07:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:07:06,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54347480] [2020-10-19 18:07:06,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125869232] [2020-10-19 18:07:06,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:06,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:06,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:07:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:07:06,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:06,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-10-19 18:07:06,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591761840] [2020-10-19 18:07:06,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 18:07:06,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:07:06,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:07:06,822 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 13 states. [2020-10-19 18:07:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:07,092 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-19 18:07:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:07:07,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-19 18:07:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:07,094 INFO L225 Difference]: With dead ends: 94 [2020-10-19 18:07:07,095 INFO L226 Difference]: Without dead ends: 94 [2020-10-19 18:07:07,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-19 18:07:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-19 18:07:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-10-19 18:07:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:07:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-19 18:07:07,100 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 37 [2020-10-19 18:07:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:07,100 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-19 18:07:07,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 18:07:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-19 18:07:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-19 18:07:07,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:07,101 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:07,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:07,302 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1930842354, now seen corresponding path program 3 times [2020-10-19 18:07:07,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:07,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146899954] [2020-10-19 18:07:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 18:07:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146899954] [2020-10-19 18:07:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053629123] [2020-10-19 18:07:07,383 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:07,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:07,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 18:07:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:07,462 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2020-10-19 18:07:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:07,483 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 18:07:07,483 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:07,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:07,501 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 18:07:07,502 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:07,509 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:07,510 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:07:07,510 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-10-19 18:07:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 18:07:07,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:07,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-10-19 18:07:07,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823207755] [2020-10-19 18:07:07,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:07:07,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:07:07,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:07,727 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 9 states. [2020-10-19 18:07:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:07,897 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-10-19 18:07:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:07,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-19 18:07:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:07,899 INFO L225 Difference]: With dead ends: 82 [2020-10-19 18:07:07,900 INFO L226 Difference]: Without dead ends: 82 [2020-10-19 18:07:07,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-19 18:07:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-19 18:07:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-19 18:07:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-19 18:07:07,911 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 41 [2020-10-19 18:07:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:07,913 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-19 18:07:07,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:07:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-19 18:07:07,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 18:07:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:07,919 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, 1, 1, 1] [2020-10-19 18:07:08,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 18:07:08,136 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash 492189859, now seen corresponding path program 2 times [2020-10-19 18:07:08,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:08,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598451849] [2020-10-19 18:07:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-19 18:07:08,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598451849] [2020-10-19 18:07:08,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494379663] [2020-10-19 18:07:08,222 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 18:07:08,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:08,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:08,269 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_25|]} [2020-10-19 18:07:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:08,281 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 18:07:08,282 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:08,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:08,298 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 18:07:08,302 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:08,307 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:08,308 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 18:07:08,309 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-19 18:07:08,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:08,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-10-19 18:07:08,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989958074] [2020-10-19 18:07:08,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:07:08,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:08,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:07:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:08,473 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-10-19 18:07:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:08,542 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-10-19 18:07:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:07:08,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-19 18:07:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:08,544 INFO L225 Difference]: With dead ends: 81 [2020-10-19 18:07:08,544 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 18:07:08,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 18:07:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-19 18:07:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-19 18:07:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-19 18:07:08,548 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 47 [2020-10-19 18:07:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:08,548 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-19 18:07:08,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:07:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-19 18:07:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-19 18:07:08,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:08,550 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, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:08,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 18:07:08,762 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 18:07:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash -190258011, now seen corresponding path program 1 times [2020-10-19 18:07:08,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:08,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86960449] [2020-10-19 18:07:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 18:07:08,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86960449] [2020-10-19 18:07:08,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284115515] [2020-10-19 18:07:08,848 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 18:07:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:07:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 18:07:08,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:08,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-19 18:07:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706210067] [2020-10-19 18:07:08,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:07:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:07:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:07:08,917 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 7 states. [2020-10-19 18:07:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:09,039 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-10-19 18:07:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:09,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-10-19 18:07:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:09,041 INFO L225 Difference]: With dead ends: 107 [2020-10-19 18:07:09,041 INFO L226 Difference]: Without dead ends: 107 [2020-10-19 18:07:09,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:07:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-19 18:07:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2020-10-19 18:07:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-19 18:07:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-19 18:07:09,045 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 50 [2020-10-19 18:07:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:09,045 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-19 18:07:09,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:07:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-19 18:07:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-19 18:07:09,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:09,047 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:09,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 18:07:09,256 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 18:07:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2025940537, now seen corresponding path program 3 times [2020-10-19 18:07:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:09,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139216284] [2020-10-19 18:07:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-19 18:07:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139216284] [2020-10-19 18:07:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640933473] [2020-10-19 18:07:09,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:09,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:09,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-19 18:07:09,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:09,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2020-10-19 18:07:09,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503379838] [2020-10-19 18:07:09,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:07:09,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:09,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:07:09,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:07:09,449 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 12 states. [2020-10-19 18:07:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:09,700 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-10-19 18:07:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:07:09,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-19 18:07:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:09,702 INFO L225 Difference]: With dead ends: 103 [2020-10-19 18:07:09,702 INFO L226 Difference]: Without dead ends: 103 [2020-10-19 18:07:09,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:07:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-19 18:07:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-10-19 18:07:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-19 18:07:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-19 18:07:09,707 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 58 [2020-10-19 18:07:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:09,707 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-19 18:07:09,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:07:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-19 18:07:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-19 18:07:09,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:09,709 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:09,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 18:07:09,918 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 18:07:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash 746278286, now seen corresponding path program 4 times [2020-10-19 18:07:09,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:09,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541548811] [2020-10-19 18:07:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-19 18:07:10,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541548811] [2020-10-19 18:07:10,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933481467] [2020-10-19 18:07:10,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:10,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:07:10,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:07:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 18:07:10,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:10,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2020-10-19 18:07:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213615131] [2020-10-19 18:07:10,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 18:07:10,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:10,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 18:07:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:07:10,173 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 16 states. [2020-10-19 18:07:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:10,734 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-19 18:07:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 18:07:10,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-19 18:07:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:10,736 INFO L225 Difference]: With dead ends: 104 [2020-10-19 18:07:10,737 INFO L226 Difference]: Without dead ends: 101 [2020-10-19 18:07:10,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-19 18:07:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-19 18:07:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-10-19 18:07:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-19 18:07:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-19 18:07:10,741 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 62 [2020-10-19 18:07:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:10,741 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-19 18:07:10,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 18:07:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-19 18:07:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-19 18:07:10,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:10,742 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:10,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:10,950 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 18:07:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:10,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1227025103, now seen corresponding path program 5 times [2020-10-19 18:07:10,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:10,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577137927] [2020-10-19 18:07:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-19 18:07:11,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577137927] [2020-10-19 18:07:11,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289646456] [2020-10-19 18:07:11,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:07:11,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-19 18:07:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:07:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:11,189 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_26|]} [2020-10-19 18:07:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:11,195 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 18:07:11,195 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:11,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:11,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:11,208 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 18:07:11,209 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:11,216 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:11,217 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 18:07:11,217 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-10-19 18:07:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-19 18:07:11,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:11,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-19 18:07:11,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636082915] [2020-10-19 18:07:11,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:07:11,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:07:11,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:07:11,436 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 10 states. [2020-10-19 18:07:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:11,587 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-10-19 18:07:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:07:11,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-19 18:07:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:11,589 INFO L225 Difference]: With dead ends: 95 [2020-10-19 18:07:11,589 INFO L226 Difference]: Without dead ends: 95 [2020-10-19 18:07:11,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:07:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-19 18:07:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-19 18:07:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-19 18:07:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-10-19 18:07:11,594 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 67 [2020-10-19 18:07:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:11,594 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-10-19 18:07:11,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:07:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-10-19 18:07:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-19 18:07:11,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:11,595 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:11,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:11,805 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:11,806 INFO L82 PathProgramCache]: Analyzing trace with hash -199290008, now seen corresponding path program 2 times [2020-10-19 18:07:11,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:11,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153152468] [2020-10-19 18:07:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-19 18:07:11,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153152468] [2020-10-19 18:07:11,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174012377] [2020-10-19 18:07:11,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:11,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:11,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:07:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:11,987 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:11,987 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 18:07:11,989 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:11,993 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:11,996 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 18:07:11,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:12,093 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:12,094 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 18:07:12,095 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:12,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:12,102 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 18:07:12,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:12,212 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:12,213 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 18:07:12,214 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:12,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:12,220 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 18:07:12,221 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-19 18:07:12,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:12,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-10-19 18:07:12,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090716123] [2020-10-19 18:07:12,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:12,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:07:12,349 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 6 states. [2020-10-19 18:07:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:12,429 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-19 18:07:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:12,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-19 18:07:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:12,431 INFO L225 Difference]: With dead ends: 92 [2020-10-19 18:07:12,431 INFO L226 Difference]: Without dead ends: 89 [2020-10-19 18:07:12,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:07:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-19 18:07:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-19 18:07:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-19 18:07:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-19 18:07:12,435 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2020-10-19 18:07:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:12,436 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-19 18:07:12,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-19 18:07:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-19 18:07:12,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:12,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:12,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-19 18:07:12,638 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 18:07:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1882931165, now seen corresponding path program 1 times [2020-10-19 18:07:12,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:12,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075985278] [2020-10-19 18:07:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:12,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:12,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:12,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:12,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-19 18:07:12,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075985278] [2020-10-19 18:07:12,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132804746] [2020-10-19 18:07:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:07:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-19 18:07:12,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:12,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-19 18:07:12,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214567291] [2020-10-19 18:07:12,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:07:12,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:07:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:07:12,808 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 8 states. [2020-10-19 18:07:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:12,926 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-10-19 18:07:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:12,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-19 18:07:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:12,927 INFO L225 Difference]: With dead ends: 108 [2020-10-19 18:07:12,928 INFO L226 Difference]: Without dead ends: 108 [2020-10-19 18:07:12,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:07:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-19 18:07:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2020-10-19 18:07:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-19 18:07:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-19 18:07:12,931 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-10-19 18:07:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:12,932 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-19 18:07:12,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:07:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-19 18:07:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-19 18:07:12,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:12,933 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:13,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:13,142 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1445837420, now seen corresponding path program 6 times [2020-10-19 18:07:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:13,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937208495] [2020-10-19 18:07:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-19 18:07:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-19 18:07:13,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937208495] [2020-10-19 18:07:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580151133] [2020-10-19 18:07:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:07:13,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-19 18:07:13,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:13,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:07:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:13,342 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_29|]} [2020-10-19 18:07:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:13,346 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 18:07:13,346 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:13,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:13,357 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 18:07:13,358 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:13,363 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:13,363 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 18:07:13,363 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 83 proven. 67 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-19 18:07:13,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:13,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2020-10-19 18:07:13,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876897471] [2020-10-19 18:07:13,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-19 18:07:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-19 18:07:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-19 18:07:13,817 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 20 states. [2020-10-19 18:07:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:14,917 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-19 18:07:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-19 18:07:14,918 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-19 18:07:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:14,919 INFO L225 Difference]: With dead ends: 106 [2020-10-19 18:07:14,919 INFO L226 Difference]: Without dead ends: 96 [2020-10-19 18:07:14,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2020-10-19 18:07:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-19 18:07:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-19 18:07:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-19 18:07:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-19 18:07:14,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 93 [2020-10-19 18:07:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:14,924 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-19 18:07:14,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-19 18:07:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-19 18:07:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-19 18:07:14,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:14,925 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:15,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-19 18:07:15,136 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1309983867, now seen corresponding path program 2 times [2020-10-19 18:07:15,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:15,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830640082] [2020-10-19 18:07:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-19 18:07:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-19 18:07:15,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830640082] [2020-10-19 18:07:15,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583013918] [2020-10-19 18:07:15,253 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 18:07:15,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:07:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-19 18:07:15,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:15,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-19 18:07:15,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570063305] [2020-10-19 18:07:15,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:07:15,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:07:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:15,391 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 9 states. [2020-10-19 18:07:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:15,503 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-19 18:07:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:07:15,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-10-19 18:07:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:15,505 INFO L225 Difference]: With dead ends: 103 [2020-10-19 18:07:15,505 INFO L226 Difference]: Without dead ends: 103 [2020-10-19 18:07:15,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:07:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-19 18:07:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-19 18:07:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-19 18:07:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-19 18:07:15,512 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 108 [2020-10-19 18:07:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:15,513 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-19 18:07:15,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:07:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-19 18:07:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-19 18:07:15,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:15,520 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:15,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:15,734 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash 472765411, now seen corresponding path program 3 times [2020-10-19 18:07:15,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:15,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533985189] [2020-10-19 18:07:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:07:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-19 18:07:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-19 18:07:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-19 18:07:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2020-10-19 18:07:15,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533985189] [2020-10-19 18:07:15,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309559361] [2020-10-19 18:07:15,869 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 18:07:15,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:07:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:15,922 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_30|]} [2020-10-19 18:07:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:15,928 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 18:07:15,928 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:15,935 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:15,947 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 18:07:15,951 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:15,964 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:15,965 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 18:07:15,966 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-10-19 18:07:16,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:16,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2020-10-19 18:07:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454258667] [2020-10-19 18:07:16,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:07:16,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:07:16,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:07:16,344 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 7 states. [2020-10-19 18:07:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:16,393 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-10-19 18:07:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:16,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-10-19 18:07:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:16,394 INFO L225 Difference]: With dead ends: 97 [2020-10-19 18:07:16,394 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:07:16,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:07:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:07:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:07:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:07:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:07:16,396 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-10-19 18:07:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:16,396 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:07:16,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:07:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:07:16,396 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:07:16,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-19 18:07:16,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:07:16 BoogieIcfgContainer [2020-10-19 18:07:16,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:07:16,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:07:16,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:07:16,604 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:07:16,604 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:07:01" (3/4) ... [2020-10-19 18:07:16,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:07:16,615 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:07:16,615 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-10-19 18:07:16,615 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:07:16,620 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-10-19 18:07:16,621 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-10-19 18:07:16,621 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-10-19 18:07:16,621 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:07:16,662 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:07:16,663 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:07:16,664 INFO L168 Benchmark]: Toolchain (without parser) took 15691.04 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 322.4 MB). Free memory was 960.0 MB in the beginning and 1.0 GB in the end (delta: -53.8 MB). Peak memory consumption was 268.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:16,664 INFO L168 Benchmark]: CDTParser took 0.13 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 18:07:16,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.08 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:16,665 INFO L168 Benchmark]: Boogie Preprocessor took 89.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.4 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -122.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:16,666 INFO L168 Benchmark]: RCFGBuilder took 314.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:16,666 INFO L168 Benchmark]: TraceAbstraction took 14957.08 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 239.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 26.3 MB). Peak memory consumption was 265.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:16,667 INFO L168 Benchmark]: Witness Printer took 59.32 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: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:16,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 260.08 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 89.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 83.4 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -122.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 314.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14957.08 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 239.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 26.3 MB). Peak memory consumption was 265.4 MB. Max. memory is 11.5 GB. * Witness Printer took 59.32 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: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 18]: 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: 23]: 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: 14.8s, OverallIterations: 25, TraceHistogramMax: 14, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 601 SDtfs, 1341 SDslu, 1101 SDs, 0 SdLazy, 3273 SolverSat, 281 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1304 GetRequests, 1043 SyntacticMatches, 31 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 209 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 2125 NumberOfCodeBlocks, 1811 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2083 ConstructedInterpolants, 395 QuantifiedInterpolants, 800524 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2311 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 42 InterpolantComputations, 13 PerfectInterpolantSequences, 3552/4007 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...