./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.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/ArraysOfVariableLength4.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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:06:46,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:06:46,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:06:46,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:06:46,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:06:46,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:06:46,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:06:46,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:06:46,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:06:46,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:06:46,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:06:46,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:06:46,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:06:46,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:06:46,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:06:46,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:06:46,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:06:46,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:06:46,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:06:46,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:06:46,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:06:46,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:06:46,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:06:46,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:06:46,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:06:46,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:06:46,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:06:46,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:06:46,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:06:46,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:06:46,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:06:46,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:06:46,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:06:46,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:06:46,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:06:46,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:06:46,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:06:46,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:06:46,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:06:46,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:06:46,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:06:46,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:06:46,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:06:46,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:06:46,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:06:46,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:06:46,420 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:06:46,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:06:46,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:06:46,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:06:46,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:06:46,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:06:46,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:06:46,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:06:46,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:06:46,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:06:46,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:06:46,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:06:46,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:06:46,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:06:46,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:06:46,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:06:46,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:06:46,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:06:46,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:06:46,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:06:46,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:06:46,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:06:46,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:06:46,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:06:46,425 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 -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2020-10-19 18:06:46,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:06:46,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:06:46,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:06:46,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:06:46,782 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:06:46,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-10-19 18:06:46,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfcaac65/048fcb5ad98645df9a3d5ed408b5ee74/FLAG91c15e997 [2020-10-19 18:06:47,349 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:06:47,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-10-19 18:06:47,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfcaac65/048fcb5ad98645df9a3d5ed408b5ee74/FLAG91c15e997 [2020-10-19 18:06:47,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfcaac65/048fcb5ad98645df9a3d5ed408b5ee74 [2020-10-19 18:06:47,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:06:47,732 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:06:47,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:47,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:06:47,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:06:47,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:47" (1/1) ... [2020-10-19 18:06:47,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1590148d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:47, skipping insertion in model container [2020-10-19 18:06:47,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:47" (1/1) ... [2020-10-19 18:06:47,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:06:47,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:06:47,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:47,967 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:06:47,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:48,000 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:06:48,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48 WrapperNode [2020-10-19 18:06:48,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:48,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:06:48,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:06:48,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:06:48,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... [2020-10-19 18:06:48,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:06:48,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:06:48,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:06:48,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:06:48,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:06:48,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:06:48,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:06:48,178 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:06:48,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:06:48,179 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:06:48,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:06:48,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:06:48,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:06:48,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:06:48,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:06:48,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:06:48,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:06:48,476 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:06:48,477 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:06:48,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:48 BoogieIcfgContainer [2020-10-19 18:06:48,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:06:48,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:06:48,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:06:48,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:06:48,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:06:47" (1/3) ... [2020-10-19 18:06:48,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71254147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:48, skipping insertion in model container [2020-10-19 18:06:48,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:48" (2/3) ... [2020-10-19 18:06:48,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71254147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:48, skipping insertion in model container [2020-10-19 18:06:48,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:48" (3/3) ... [2020-10-19 18:06:48,494 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2020-10-19 18:06:48,514 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:06:48,526 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-19 18:06:48,547 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-19 18:06:48,577 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:06:48,577 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:06:48,577 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:06:48,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:06:48,578 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:06:48,578 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:06:48,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:06:48,579 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:06:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-19 18:06:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:06:48,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:48,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:48,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-10-19 18:06:48,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:48,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135918013] [2020-10-19 18:06:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:48,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:48,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135918013] [2020-10-19 18:06:48,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:48,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:06:48,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971199946] [2020-10-19 18:06:48,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:48,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:48,907 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-19 18:06:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:49,106 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:06:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:49,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:06:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:49,120 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:06:49,120 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:06:49,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:06:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:06:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-19 18:06:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 18:06:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-19 18:06:49,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-10-19 18:06:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:49,173 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-19 18:06:49,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-19 18:06:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:06:49,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:49,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:49,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:06:49,176 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-10-19 18:06:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:49,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354891434] [2020-10-19 18:06:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:49,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354891434] [2020-10-19 18:06:49,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:49,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:49,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746495425] [2020-10-19 18:06:49,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:49,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:49,283 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-10-19 18:06:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:49,398 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-19 18:06:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:49,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 18:06:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:49,402 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:06:49,403 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:06:49,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:06:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:06:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-19 18:06:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:06:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 18:06:49,412 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-10-19 18:06:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:49,413 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 18:06:49,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 18:06:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:06:49,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:49,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:49,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:06:49,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-10-19 18:06:49,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:49,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673301333] [2020-10-19 18:06:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:49,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673301333] [2020-10-19 18:06:49,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:49,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:06:49,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829225889] [2020-10-19 18:06:49,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:49,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:49,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:49,530 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-10-19 18:06:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:49,694 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-19 18:06:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:49,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-19 18:06:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:49,698 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:06:49,699 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 18:06:49,699 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 18:06:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 18:06:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 18:06:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 18:06:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-19 18:06:49,714 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-10-19 18:06:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:49,715 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-19 18:06:49,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-19 18:06:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:06:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:49,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:49,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:06:49,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-10-19 18:06:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:49,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359279217] [2020-10-19 18:06:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:49,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359279217] [2020-10-19 18:06:49,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:49,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:06:49,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523876412] [2020-10-19 18:06:49,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:49,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:49,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:49,888 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-19 18:06:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:50,065 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-19 18:06:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:50,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-19 18:06:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:50,067 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:06:50,067 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 18:06:50,068 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 18:06:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 18:06:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-19 18:06:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:06:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 18:06:50,074 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-10-19 18:06:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:50,075 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 18:06:50,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 18:06:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:06:50,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:50,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:50,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:06:50,077 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-10-19 18:06:50,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:50,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115213856] [2020-10-19 18:06:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:50,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115213856] [2020-10-19 18:06:50,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:50,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:06:50,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776031576] [2020-10-19 18:06:50,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:06:50,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:06:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:06:50,170 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-10-19 18:06:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:50,327 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-19 18:06:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:50,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-19 18:06:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:50,328 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:06:50,329 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:06:50,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:06:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-19 18:06:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:06:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-19 18:06:50,335 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2020-10-19 18:06:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:50,335 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-19 18:06:50,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:06:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-19 18:06:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:06:50,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:50,337 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:50,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:06:50,337 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-10-19 18:06:50,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:50,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928993128] [2020-10-19 18:06:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:50,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928993128] [2020-10-19 18:06:50,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775919850] [2020-10-19 18:06:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:06:50,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:50,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:50,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-10-19 18:06:50,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236422294] [2020-10-19 18:06:50,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:06:50,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:06:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:06:50,489 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-10-19 18:06:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:50,605 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-19 18:06:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:50,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-19 18:06:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:50,607 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:06:50,607 INFO L226 Difference]: Without dead ends: 52 [2020-10-19 18:06:50,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-19 18:06:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-19 18:06:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-19 18:06:50,613 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-10-19 18:06:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:50,613 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-19 18:06:50,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:06:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-19 18:06:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:06:50,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:50,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:50,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-19 18:06:50,828 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2020-10-19 18:06:50,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:50,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091352630] [2020-10-19 18:06:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:06:50,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091352630] [2020-10-19 18:06:50,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:50,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:06:50,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470576512] [2020-10-19 18:06:50,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:06:50,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:50,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:06:50,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:06:50,919 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-10-19 18:06:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:51,073 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-19 18:06:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:06:51,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-19 18:06:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:51,075 INFO L225 Difference]: With dead ends: 44 [2020-10-19 18:06:51,075 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 18:06:51,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 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 18:06:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 18:06:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-19 18:06:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:06:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-19 18:06:51,081 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-10-19 18:06:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:51,082 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-19 18:06:51,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:06:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-19 18:06:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:06:51,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:51,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:51,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:06:51,084 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-10-19 18:06:51,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:51,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943861453] [2020-10-19 18:06:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:51,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943861453] [2020-10-19 18:06:51,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807376472] [2020-10-19 18:06:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:06:51,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:51,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:51,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-19 18:06:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231318322] [2020-10-19 18:06:51,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:06:51,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:51,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:06:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:51,332 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-10-19 18:06:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:51,579 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-19 18:06:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:51,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-19 18:06:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:51,582 INFO L225 Difference]: With dead ends: 50 [2020-10-19 18:06:51,582 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 18:06:51,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 18:06:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-19 18:06:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:06:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-19 18:06:51,595 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2020-10-19 18:06:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:51,596 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-19 18:06:51,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:06:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-19 18:06:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:06:51,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:51,597 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:51,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:51,799 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2020-10-19 18:06:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:51,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768239555] [2020-10-19 18:06:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:51,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768239555] [2020-10-19 18:06:51,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819105839] [2020-10-19 18:06:51,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:51,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:06:51,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:06:51,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:06:52,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:52,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-10-19 18:06:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027246093] [2020-10-19 18:06:52,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:06:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:06:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:52,056 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-10-19 18:06:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:52,304 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:06:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:06:52,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-19 18:06:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:52,306 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:06:52,306 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 18:06:52,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:06:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 18:06:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-19 18:06:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 18:06:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-19 18:06:52,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2020-10-19 18:06:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:52,311 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-19 18:06:52,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:06:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-19 18:06:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:06:52,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:52,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:52,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:52,523 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:52,524 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2020-10-19 18:06:52,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:52,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963164545] [2020-10-19 18:06:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:52,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963164545] [2020-10-19 18:06:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393413387] [2020-10-19 18:06:52,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:52,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:06:52,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:52,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:06:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:52,745 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 18:06:52,746 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:06:52,746 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:52,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:52,752 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:06:52,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-10-19 18:06:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:52,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:52,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-10-19 18:06:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676741093] [2020-10-19 18:06:52,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:52,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:52,827 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2020-10-19 18:06:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:52,850 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-19 18:06:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:52,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:06:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:52,851 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:06:52,851 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 18:06:52,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 18:06:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 18:06:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 18:06:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-19 18:06:52,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-10-19 18:06:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:52,855 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-19 18:06:52,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-19 18:06:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:06:52,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:52,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:53,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:53,067 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2020-10-19 18:06:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:53,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36452594] [2020-10-19 18:06:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36452594] [2020-10-19 18:06:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321517256] [2020-10-19 18:06:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:06:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:53,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:53,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-19 18:06:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386664352] [2020-10-19 18:06:53,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:06:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:06:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:53,317 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-10-19 18:06:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:53,583 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-19 18:06:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:06:53,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-19 18:06:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:53,584 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:06:53,584 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:06:53,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:06:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:06:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-19 18:06:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 18:06:53,589 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-10-19 18:06:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:53,589 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 18:06:53,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:06:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 18:06:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:06:53,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:53,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:53,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-19 18:06:53,801 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2020-10-19 18:06:53,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:53,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999095052] [2020-10-19 18:06:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:53,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999095052] [2020-10-19 18:06:53,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846819983] [2020-10-19 18:06:53,979 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 18:06:54,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:06:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:06:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:54,025 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_25|]} [2020-10-19 18:06:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:54,031 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:06:54,031 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:54,041 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:54,049 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:06:54,050 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:54,058 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:54,059 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 18:06:54,059 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-10-19 18:06:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 18:06:54,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:54,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2020-10-19 18:06:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712124189] [2020-10-19 18:06:54,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:54,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:54,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:54,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:54,156 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-10-19 18:06:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:54,204 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-19 18:06:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:54,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:06:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:54,205 INFO L225 Difference]: With dead ends: 50 [2020-10-19 18:06:54,205 INFO L226 Difference]: Without dead ends: 50 [2020-10-19 18:06:54,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-19 18:06:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-19 18:06:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-19 18:06:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-19 18:06:54,210 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2020-10-19 18:06:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:54,210 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-19 18:06:54,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-19 18:06:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 18:06:54,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:54,212 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:54,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:54,424 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2020-10-19 18:06:54,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:54,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847931455] [2020-10-19 18:06:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 18:06:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847931455] [2020-10-19 18:06:54,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637666752] [2020-10-19 18:06:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:06:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:54,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:54,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-10-19 18:06:54,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244265180] [2020-10-19 18:06:54,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:06:54,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:06:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:54,608 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-19 18:06:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:54,891 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-19 18:06:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:06:54,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-19 18:06:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:54,896 INFO L225 Difference]: With dead ends: 84 [2020-10-19 18:06:54,896 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 18:06:54,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:06:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 18:06:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-19 18:06:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 18:06:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-19 18:06:54,912 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2020-10-19 18:06:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:54,913 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-19 18:06:54,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:06:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-19 18:06:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-19 18:06:54,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:54,915 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:55,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:55,118 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:55,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2020-10-19 18:06:55,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:55,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010062119] [2020-10-19 18:06:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-19 18:06:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 18:06:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010062119] [2020-10-19 18:06:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523997208] [2020-10-19 18:06:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:06:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-19 18:06:55,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:55,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-19 18:06:55,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144896523] [2020-10-19 18:06:55,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 18:06:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 18:06:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:06:55,611 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 15 states. [2020-10-19 18:06:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:55,987 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-19 18:06:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:06:55,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-19 18:06:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:55,989 INFO L225 Difference]: With dead ends: 72 [2020-10-19 18:06:55,989 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:06:55,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:06:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:06:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-19 18:06:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 18:06:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-19 18:06:55,994 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2020-10-19 18:06:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:55,995 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-19 18:06:55,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 18:06:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-19 18:06:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-19 18:06:55,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:55,996 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:56,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 18:06:56,208 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2020-10-19 18:06:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:56,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812943466] [2020-10-19 18:06:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-19 18:06:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-19 18:06:56,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812943466] [2020-10-19 18:06:56,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822792579] [2020-10-19 18:06:56,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:56,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:06:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:56,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:06:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-19 18:06:56,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:56,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-19 18:06:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834913590] [2020-10-19 18:06:56,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 18:06:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:56,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 18:06:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:06:56,646 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 17 states. [2020-10-19 18:06:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:57,118 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-19 18:06:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:06:57,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-19 18:06:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:57,120 INFO L225 Difference]: With dead ends: 77 [2020-10-19 18:06:57,120 INFO L226 Difference]: Without dead ends: 74 [2020-10-19 18:06:57,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-10-19 18:06:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-19 18:06:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-19 18:06:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-19 18:06:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-19 18:06:57,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2020-10-19 18:06:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:57,125 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-19 18:06:57,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 18:06:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-19 18:06:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-19 18:06:57,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:57,127 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:57,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 18:06:57,338 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:06:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:57,339 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2020-10-19 18:06:57,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:57,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770110436] [2020-10-19 18:06:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-19 18:06:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-19 18:06:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770110436] [2020-10-19 18:06:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348019866] [2020-10-19 18:06:57,664 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 18:06:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:06:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 18:06:57,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:57,719 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-10-19 18:06:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:57,725 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:06:57,726 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:57,733 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:57,738 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:06:57,739 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:57,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:57,745 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:57,745 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-10-19 18:06:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-10-19 18:06:58,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:58,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-10-19 18:06:58,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571038731] [2020-10-19 18:06:58,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 18:06:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 18:06:58,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-19 18:06:58,050 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 15 states. [2020-10-19 18:06:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:58,711 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-19 18:06:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 18:06:58,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2020-10-19 18:06:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:58,713 INFO L225 Difference]: With dead ends: 87 [2020-10-19 18:06:58,713 INFO L226 Difference]: Without dead ends: 84 [2020-10-19 18:06:58,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-10-19 18:06:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-19 18:06:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-19 18:06:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:06:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-19 18:06:58,718 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2020-10-19 18:06:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:58,719 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-19 18:06:58,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 18:06:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-19 18:06:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-19 18:06:58,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:58,721 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:58,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 18:06:58,933 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 18:06:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2020-10-19 18:06:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:58,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332492] [2020-10-19 18:06:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-19 18:06:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2020-10-19 18:06:59,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332492] [2020-10-19 18:06:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335399175] [2020-10-19 18:06:59,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:59,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:06:59,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:59,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:06:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:59,087 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2020-10-19 18:06:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:59,091 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 18:06:59,092 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:59,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:06:59,109 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-19 18:06:59,110 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:59,115 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:59,116 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 18:06:59,116 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:06:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-19 18:06:59,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:59,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-10-19 18:06:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33785566] [2020-10-19 18:06:59,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:06:59,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:59,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:06:59,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:59,331 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-10-19 18:06:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:59,380 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-19 18:06:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:59,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-19 18:06:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:59,381 INFO L225 Difference]: With dead ends: 79 [2020-10-19 18:06:59,382 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:06:59,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:06:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-19 18:06:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:06:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-19 18:06:59,386 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2020-10-19 18:06:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:59,387 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-19 18:06:59,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:06:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-19 18:06:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-19 18:06:59,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:59,388 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:59,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 18:06:59,601 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 18:06:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2020-10-19 18:06:59,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:59,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217972674] [2020-10-19 18:06:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-19 18:06:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-19 18:06:59,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217972674] [2020-10-19 18:06:59,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646505978] [2020-10-19 18:06:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:07:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-19 18:07:00,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:00,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-19 18:07:00,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071551746] [2020-10-19 18:07:00,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-19 18:07:00,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-19 18:07:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:07:00,274 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 21 states. [2020-10-19 18:07:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:00,871 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-19 18:07:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:07:00,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-10-19 18:07:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:00,872 INFO L225 Difference]: With dead ends: 90 [2020-10-19 18:07:00,872 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 18:07:00,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-10-19 18:07:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 18:07:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-19 18:07:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-19 18:07:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-19 18:07:00,880 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2020-10-19 18:07:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:00,881 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-19 18:07:00,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-19 18:07:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-19 18:07:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-19 18:07:00,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:00,884 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:01,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 18:07:01,095 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 18:07:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2020-10-19 18:07:01,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:01,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708125969] [2020-10-19 18:07:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-19 18:07:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-10-19 18:07:01,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708125969] [2020-10-19 18:07:01,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025139015] [2020-10-19 18:07:01,507 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 18:07:01,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:07:01,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:07:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:01,605 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:01,605 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 18:07:01,606 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:01,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:01,614 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 18:07:01,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:01,926 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-19 18:07:01,926 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 18:07:01,927 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:01,933 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:01,935 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 18:07:01,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-19 18:07:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-19 18:07:02,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:02,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2020-10-19 18:07:02,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935359148] [2020-10-19 18:07:02,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:07:02,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:07:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:07:02,334 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 6 states. [2020-10-19 18:07:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:02,469 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-19 18:07:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:07:02,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-19 18:07:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:02,472 INFO L225 Difference]: With dead ends: 82 [2020-10-19 18:07:02,472 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:07:02,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:07:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:07:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-19 18:07:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 18:07:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-19 18:07:02,479 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2020-10-19 18:07:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:02,479 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-19 18:07:02,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:07:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-19 18:07:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-19 18:07:02,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:02,485 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:02,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:02,700 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 18:07:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2020-10-19 18:07:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:02,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784260963] [2020-10-19 18:07:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-19 18:07:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-19 18:07:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784260963] [2020-10-19 18:07:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920187262] [2020-10-19 18:07:03,265 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 18:07:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:03,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:07:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-19 18:07:03,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:03,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-19 18:07:03,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922198974] [2020-10-19 18:07:03,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-19 18:07:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-19 18:07:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-19 18:07:03,559 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 23 states. [2020-10-19 18:07:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:04,296 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-19 18:07:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:07:04,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-10-19 18:07:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:04,298 INFO L225 Difference]: With dead ends: 88 [2020-10-19 18:07:04,298 INFO L226 Difference]: Without dead ends: 85 [2020-10-19 18:07:04,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-10-19 18:07:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-19 18:07:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-19 18:07:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-19 18:07:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-19 18:07:04,307 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2020-10-19 18:07:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:04,307 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-19 18:07:04,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-19 18:07:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-19 18:07:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-19 18:07:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:04,310 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:04,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:04,522 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 18:07:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:04,523 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2020-10-19 18:07:04,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:04,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556289364] [2020-10-19 18:07:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:04,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-19 18:07:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-19 18:07:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556289364] [2020-10-19 18:07:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934103096] [2020-10-19 18:07:05,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:05,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:07:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 18:07:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-19 18:07:05,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:05,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-19 18:07:05,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148200863] [2020-10-19 18:07:05,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-19 18:07:05,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-19 18:07:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-19 18:07:05,372 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 25 states. [2020-10-19 18:07:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:06,132 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-19 18:07:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 18:07:06,133 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-10-19 18:07:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:06,134 INFO L225 Difference]: With dead ends: 93 [2020-10-19 18:07:06,134 INFO L226 Difference]: Without dead ends: 90 [2020-10-19 18:07:06,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-10-19 18:07:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-19 18:07:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-19 18:07:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-19 18:07:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-19 18:07:06,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2020-10-19 18:07:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:06,140 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-19 18:07:06,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-19 18:07:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-19 18:07:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-19 18:07:06,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:06,142 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:06,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-19 18:07:06,354 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:07:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2020-10-19 18:07:06,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:06,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981107146] [2020-10-19 18:07:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-19 18:07:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-19 18:07:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981107146] [2020-10-19 18:07:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266100717] [2020-10-19 18:07:06,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:06,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 18:07:06,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:07:06,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2020-10-19 18:07:07,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:07,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2020-10-19 18:07:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441222968] [2020-10-19 18:07:07,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-19 18:07:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:07,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-19 18:07:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:07:07,127 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-10-19 18:07:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:08,232 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-19 18:07:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 18:07:08,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-10-19 18:07:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:08,237 INFO L225 Difference]: With dead ends: 109 [2020-10-19 18:07:08,238 INFO L226 Difference]: Without dead ends: 106 [2020-10-19 18:07:08,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-10-19 18:07:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-19 18:07:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2020-10-19 18:07:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-19 18:07:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-19 18:07:08,248 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2020-10-19 18:07:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:08,249 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-19 18:07:08,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-19 18:07:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-19 18:07:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-19 18:07:08,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:08,254 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:08,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:08,469 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 18:07:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:08,470 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2020-10-19 18:07:08,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:08,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348697467] [2020-10-19 18:07:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:08,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-19 18:07:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-19 18:07:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348697467] [2020-10-19 18:07:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479331770] [2020-10-19 18:07:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:09,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:07:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:09,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 18:07:09,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-10-19 18:07:09,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:09,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-10-19 18:07:09,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602825878] [2020-10-19 18:07:09,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-19 18:07:09,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-19 18:07:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-19 18:07:09,603 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 29 states. [2020-10-19 18:07:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:10,569 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-10-19 18:07:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-19 18:07:10,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-10-19 18:07:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:10,572 INFO L225 Difference]: With dead ends: 107 [2020-10-19 18:07:10,573 INFO L226 Difference]: Without dead ends: 104 [2020-10-19 18:07:10,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-19 18:07:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-19 18:07:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-19 18:07:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-19 18:07:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-19 18:07:10,580 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2020-10-19 18:07:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:10,580 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-19 18:07:10,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-19 18:07:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-19 18:07:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-19 18:07:10,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:10,582 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:10,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-19 18:07:10,795 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 18:07:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2020-10-19 18:07:10,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:10,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518147161] [2020-10-19 18:07:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:10,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-19 18:07:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-10-19 18:07:11,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518147161] [2020-10-19 18:07:11,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708630900] [2020-10-19 18:07:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:11,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-19 18:07:11,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 18:07:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-10-19 18:07:12,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:07:12,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-10-19 18:07:12,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955781446] [2020-10-19 18:07:12,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-19 18:07:12,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-19 18:07:12,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-10-19 18:07:12,011 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 31 states. [2020-10-19 18:07:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:13,064 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-19 18:07:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-19 18:07:13,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-10-19 18:07:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:13,067 INFO L225 Difference]: With dead ends: 112 [2020-10-19 18:07:13,067 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 18:07:13,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2020-10-19 18:07:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 18:07:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-19 18:07:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-19 18:07:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-19 18:07:13,076 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2020-10-19 18:07:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:13,076 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-19 18:07:13,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-19 18:07:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-19 18:07:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-19 18:07:13,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:07:13,078 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:07:13,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-19 18:07:13,294 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 18:07:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:07:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2020-10-19 18:07:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:07:13,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400937546] [2020-10-19 18:07:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:07:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:07:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:07:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-19 18:07:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:07:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-19 18:07:13,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400937546] [2020-10-19 18:07:13,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987143568] [2020-10-19 18:07:13,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:07:14,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-19 18:07:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:07:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:07:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:07:14,019 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_30|]} [2020-10-19 18:07:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:14,026 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 18:07:14,027 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:14,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:07:14,039 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 18:07:14,040 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:07:14,045 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:07:14,046 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 18:07:14,046 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-19 18:07:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2020-10-19 18:07:14,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:07:14,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2020-10-19 18:07:14,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564112809] [2020-10-19 18:07:14,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:07:14,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:07:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:07:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-19 18:07:14,456 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 7 states. [2020-10-19 18:07:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:07:14,523 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-10-19 18:07:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:07:14,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-10-19 18:07:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:07:14,524 INFO L225 Difference]: With dead ends: 103 [2020-10-19 18:07:14,524 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:07:14,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-19 18:07:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:07:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:07:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:07:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:07:14,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2020-10-19 18:07:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:07:14,526 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:07:14,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:07:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:07:14,527 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:07:14,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-19 18:07:14,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:07:14 BoogieIcfgContainer [2020-10-19 18:07:14,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:07:14,735 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:07:14,735 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:07:14,736 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:07:14,736 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:48" (3/4) ... [2020-10-19 18:07:14,742 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:07:14,749 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:07:14,749 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-10-19 18:07:14,749 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:07:14,755 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-10-19 18:07:14,755 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-10-19 18:07:14,755 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-10-19 18:07:14,756 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:07:14,802 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:07:14,803 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:07:14,804 INFO L168 Benchmark]: Toolchain (without parser) took 27077.97 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 473.4 MB). Free memory was 950.6 MB in the beginning and 1.3 GB in the end (delta: -376.6 MB). Peak memory consumption was 96.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:14,805 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:07:14,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.05 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 939.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:14,806 INFO L168 Benchmark]: Boogie Preprocessor took 101.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:14,807 INFO L168 Benchmark]: RCFGBuilder took 377.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:14,808 INFO L168 Benchmark]: TraceAbstraction took 26252.36 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 323.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -210.9 MB). Peak memory consumption was 112.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:07:14,808 INFO L168 Benchmark]: Witness Printer took 67.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:07:14,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 268.05 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 939.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 101.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 377.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26252.36 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 323.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -210.9 MB). Peak memory consumption was 112.1 MB. Max. memory is 11.5 GB. * Witness Printer took 67.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: 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: 26.1s, OverallIterations: 25, TraceHistogramMax: 26, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 621 SDtfs, 1816 SDslu, 3405 SDs, 0 SdLazy, 3377 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1980 GetRequests, 1548 SyntacticMatches, 14 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 2350632 SizeOfPredicates, 31 NumberOfNonLiveVariables, 3127 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10777/18637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...