./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.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/ArraysOfVariableLength.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 a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:06:19,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:06:19,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:06:19,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:06:19,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:06:19,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:06:19,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:06:19,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:06:19,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:06:19,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:06:19,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:06:19,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:06:19,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:06:19,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:06:19,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:06:19,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:06:19,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:06:19,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:06:19,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:06:19,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:06:19,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:06:19,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:06:19,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:06:19,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:06:19,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:06:19,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:06:19,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:06:19,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:06:19,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:06:19,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:06:19,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:06:19,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:06:19,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:06:19,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:06:19,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:06:19,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:06:19,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:06:19,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:06:19,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:06:19,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:06:19,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:06:19,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:06:19,613 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:06:19,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:06:19,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:06:19,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:06:19,615 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:06:19,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:06:19,616 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:06:19,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:06:19,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:06:19,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:06:19,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:06:19,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:06:19,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:06:19,617 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:06:19,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:06:19,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:06:19,618 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:06:19,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:06:19,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:06:19,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:06:19,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:06:19,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:06:19,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:06:19,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:06:19,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:06:19,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:06:19,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:06:19,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:06:19,622 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 -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2020-10-19 18:06:19,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:06:19,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:06:19,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:06:19,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:06:19,963 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:06:19,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-10-19 18:06:20,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5321b0e85/02e51741c6e54097ac559bd56170d9b3/FLAGbac93bc66 [2020-10-19 18:06:20,508 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:06:20,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-10-19 18:06:20,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5321b0e85/02e51741c6e54097ac559bd56170d9b3/FLAGbac93bc66 [2020-10-19 18:06:20,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5321b0e85/02e51741c6e54097ac559bd56170d9b3 [2020-10-19 18:06:20,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:06:20,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:06:20,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:20,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:06:20,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:06:20,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:20" (1/1) ... [2020-10-19 18:06:20,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1586832b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:20, skipping insertion in model container [2020-10-19 18:06:20,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:06:20" (1/1) ... [2020-10-19 18:06:20,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:06:20,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:06:21,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:21,193 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:06:21,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:06:21,226 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:06:21,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21 WrapperNode [2020-10-19 18:06:21,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:06:21,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:06:21,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:06:21,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:06:21,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (1/1) ... [2020-10-19 18:06:21,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:06:21,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:06:21,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:06:21,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:06:21,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (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 18:06:21,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:06:21,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:06:21,385 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:06:21,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:06:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:06:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:06:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:06:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:06:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:06:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:06:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:06:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:06:21,733 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:06:21,734 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:06:21,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:21 BoogieIcfgContainer [2020-10-19 18:06:21,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:06:21,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:06:21,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:06:21,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:06:21,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:06:20" (1/3) ... [2020-10-19 18:06:21,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9ebb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:21, skipping insertion in model container [2020-10-19 18:06:21,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:06:21" (2/3) ... [2020-10-19 18:06:21,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9ebb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:06:21, skipping insertion in model container [2020-10-19 18:06:21,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:21" (3/3) ... [2020-10-19 18:06:21,752 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2020-10-19 18:06:21,764 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:06:21,772 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-19 18:06:21,784 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-19 18:06:21,803 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:06:21,804 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:06:21,804 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:06:21,804 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:06:21,804 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:06:21,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:06:21,805 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:06:21,805 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:06:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-19 18:06:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:06:21,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:21,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:21,833 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 18:06:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-10-19 18:06:21,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:21,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867930346] [2020-10-19 18:06:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,038 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 18:06:22,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867930346] [2020-10-19 18:06:22,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:22,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:06:22,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601611402] [2020-10-19 18:06:22,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:22,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:22,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:22,062 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-19 18:06:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:22,258 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 18:06:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:22,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:06:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:22,271 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:06:22,271 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:06:22,274 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 18:06:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:06:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-19 18:06:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 18:06:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-19 18:06:22,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-10-19 18:06:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:22,323 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-19 18:06:22,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-19 18:06:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:06:22,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:22,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:22,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:06:22,325 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 18:06:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-10-19 18:06:22,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:22,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034617528] [2020-10-19 18:06:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,432 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 18:06:22,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034617528] [2020-10-19 18:06:22,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:22,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:06:22,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156982279] [2020-10-19 18:06:22,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:22,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:22,438 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 6 states. [2020-10-19 18:06:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:22,631 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-19 18:06:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:22,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-19 18:06:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:22,634 INFO L225 Difference]: With dead ends: 59 [2020-10-19 18:06:22,634 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 18:06:22,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 18:06:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-10-19 18:06:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 18:06:22,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2020-10-19 18:06:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:22,646 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 18:06:22,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 18:06:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:06:22,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:22,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:22,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:06:22,648 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 18:06:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:22,649 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-10-19 18:06:22,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:22,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265697035] [2020-10-19 18:06:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,759 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 18:06:22,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265697035] [2020-10-19 18:06:22,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:22,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:22,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743126152] [2020-10-19 18:06:22,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:22,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:22,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:22,770 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-10-19 18:06:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:22,859 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-19 18:06:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:22,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-19 18:06:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:22,864 INFO L225 Difference]: With dead ends: 43 [2020-10-19 18:06:22,864 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:06:22,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:06:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-19 18:06:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-19 18:06:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-19 18:06:22,881 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2020-10-19 18:06:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:22,882 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-19 18:06:22,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-19 18:06:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:06:22,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:22,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:22,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:06:22,885 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 18:06:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:22,886 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2020-10-19 18:06:22,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:22,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487771128] [2020-10-19 18:06:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:22,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,020 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 18:06:23,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487771128] [2020-10-19 18:06:23,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:23,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:06:23,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594614] [2020-10-19 18:06:23,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:06:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:06:23,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:23,028 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-10-19 18:06:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:23,139 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-19 18:06:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:06:23,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-19 18:06:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:23,141 INFO L225 Difference]: With dead ends: 47 [2020-10-19 18:06:23,141 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 18:06:23,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:06:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 18:06:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-19 18:06:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:06:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 18:06:23,153 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2020-10-19 18:06:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:23,153 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 18:06:23,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:06:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 18:06:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:06:23,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:23,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:23,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:06:23,156 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 18:06:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2020-10-19 18:06:23,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:23,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782709530] [2020-10-19 18:06:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,214 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 18:06:23,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782709530] [2020-10-19 18:06:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022721918] [2020-10-19 18:06:23,216 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 18:06:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:06:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:23,348 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 18:06:23,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:23,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 18:06:23,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803514690] [2020-10-19 18:06:23,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:23,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:23,351 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 6 states. [2020-10-19 18:06:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:23,512 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-10-19 18:06:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:06:23,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-19 18:06:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:23,514 INFO L225 Difference]: With dead ends: 69 [2020-10-19 18:06:23,515 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:06:23,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:06:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-19 18:06:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 18:06:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-19 18:06:23,534 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2020-10-19 18:06:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:23,535 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-19 18:06:23,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-19 18:06:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:06:23,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:23,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:23,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:23,738 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 18:06:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:23,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2020-10-19 18:06:23,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:23,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506048817] [2020-10-19 18:06:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506048817] [2020-10-19 18:06:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677904682] [2020-10-19 18:06:23,871 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 18:06:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:06:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:23,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:23,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-10-19 18:06:23,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548786994] [2020-10-19 18:06:23,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:23,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:23,946 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 6 states. [2020-10-19 18:06:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:24,073 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-10-19 18:06:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:24,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-19 18:06:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:24,075 INFO L225 Difference]: With dead ends: 66 [2020-10-19 18:06:24,075 INFO L226 Difference]: Without dead ends: 66 [2020-10-19 18:06:24,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-19 18:06:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-19 18:06:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:06:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-19 18:06:24,082 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2020-10-19 18:06:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:24,083 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-19 18:06:24,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-19 18:06:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:06:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:24,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:24,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:24,298 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 18:06:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2020-10-19 18:06:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:24,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288439659] [2020-10-19 18:06:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:24,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288439659] [2020-10-19 18:06:24,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:24,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:06:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915171021] [2020-10-19 18:06:24,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:24,390 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2020-10-19 18:06:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:24,492 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-19 18:06:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:24,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-19 18:06:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:24,494 INFO L225 Difference]: With dead ends: 53 [2020-10-19 18:06:24,495 INFO L226 Difference]: Without dead ends: 53 [2020-10-19 18:06:24,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 18:06:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-19 18:06:24,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-19 18:06:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-19 18:06:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-19 18:06:24,501 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2020-10-19 18:06:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:24,502 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-19 18:06:24,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-19 18:06:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:06:24,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:24,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:24,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:06:24,504 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 18:06:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2020-10-19 18:06:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:24,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311125975] [2020-10-19 18:06:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:06:24,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311125975] [2020-10-19 18:06:24,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:06:24,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:06:24,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187139515] [2020-10-19 18:06:24,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:24,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:24,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:06:24,585 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 6 states. [2020-10-19 18:06:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:24,734 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-19 18:06:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:24,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-19 18:06:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:24,736 INFO L225 Difference]: With dead ends: 59 [2020-10-19 18:06:24,736 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 18:06:24,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 18:06:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 18:06:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-19 18:06:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:06:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-19 18:06:24,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2020-10-19 18:06:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:24,751 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-19 18:06:24,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-19 18:06:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:06:24,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:24,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:24,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:06:24,753 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 18:06:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2020-10-19 18:06:24,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:24,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605681281] [2020-10-19 18:06:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 18:06:24,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605681281] [2020-10-19 18:06:24,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539093301] [2020-10-19 18:06:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:06:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:06:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2020-10-19 18:06:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082500854] [2020-10-19 18:06:24,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:24,945 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2020-10-19 18:06:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:25,062 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-19 18:06:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:25,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-19 18:06:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:25,064 INFO L225 Difference]: With dead ends: 63 [2020-10-19 18:06:25,065 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 18:06:25,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 18:06:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-19 18:06:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:06:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-19 18:06:25,070 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2020-10-19 18:06:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:25,071 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-19 18:06:25,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-19 18:06:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:06:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:25,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:25,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:25,274 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 18:06:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2020-10-19 18:06:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:25,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451484820] [2020-10-19 18:06:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:25,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451484820] [2020-10-19 18:06:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212347479] [2020-10-19 18:06:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:06:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:06:25,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:25,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-19 18:06:25,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593450976] [2020-10-19 18:06:25,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:06:25,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:06:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:06:25,476 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 11 states. [2020-10-19 18:06:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:25,745 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-19 18:06:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:06:25,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-19 18:06:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:25,747 INFO L225 Difference]: With dead ends: 81 [2020-10-19 18:06:25,747 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 18:06:25,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:06:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 18:06:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-10-19 18:06:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 18:06:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-19 18:06:25,752 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2020-10-19 18:06:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:25,753 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-19 18:06:25,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:06:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-19 18:06:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:06:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:25,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:25,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:25,967 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 18:06:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2020-10-19 18:06:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:25,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579490605] [2020-10-19 18:06:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:26,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579490605] [2020-10-19 18:06:26,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737317139] [2020-10-19 18:06:26,087 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 18:06:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:06:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:26,214 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:06:26,215 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:26,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:26,231 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:26,231 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 18:06:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:26,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:26,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-10-19 18:06:26,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575315522] [2020-10-19 18:06:26,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:06:26,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:06:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:06:26,378 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 8 states. [2020-10-19 18:06:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:26,539 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-19 18:06:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:06:26,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-19 18:06:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:26,541 INFO L225 Difference]: With dead ends: 74 [2020-10-19 18:06:26,541 INFO L226 Difference]: Without dead ends: 74 [2020-10-19 18:06:26,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:06:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-19 18:06:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-19 18:06:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-19 18:06:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-19 18:06:26,548 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 31 [2020-10-19 18:06:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:26,548 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-19 18:06:26,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:06:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-19 18:06:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-19 18:06:26,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:26,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:26,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-19 18:06:26,763 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 18:06:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2020-10-19 18:06:26,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:26,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829838800] [2020-10-19 18:06:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:06:26,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829838800] [2020-10-19 18:06:26,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343301585] [2020-10-19 18:06:26,866 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 18:06:26,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:06:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:06:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-19 18:06:26,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:26,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-10-19 18:06:26,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52665443] [2020-10-19 18:06:26,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:06:26,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:06:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:26,978 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 12 states. [2020-10-19 18:06:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:27,417 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-19 18:06:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:06:27,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-19 18:06:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:27,419 INFO L225 Difference]: With dead ends: 83 [2020-10-19 18:06:27,419 INFO L226 Difference]: Without dead ends: 83 [2020-10-19 18:06:27,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-19 18:06:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-19 18:06:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-10-19 18:06:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-19 18:06:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-19 18:06:27,424 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 43 [2020-10-19 18:06:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:27,424 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-19 18:06:27,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:06:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-19 18:06:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-19 18:06:27,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:27,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:27,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:27,634 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 18:06:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2020-10-19 18:06:27,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:27,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192183359] [2020-10-19 18:06:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:27,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:27,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:27,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-19 18:06:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192183359] [2020-10-19 18:06:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142845422] [2020-10-19 18:06:27,783 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 18:06:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 18:06:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:27,852 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:06:27,852 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:27,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:27,858 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:27,858 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 18:06:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-19 18:06:27,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:27,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-19 18:06:27,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522659658] [2020-10-19 18:06:27,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:06:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:06:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:06:27,954 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 10 states. [2020-10-19 18:06:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:28,147 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-19 18:06:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:06:28,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-19 18:06:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:28,149 INFO L225 Difference]: With dead ends: 81 [2020-10-19 18:06:28,149 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 18:06:28,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:06:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 18:06:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-10-19 18:06:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 18:06:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-19 18:06:28,155 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 44 [2020-10-19 18:06:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:28,156 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-19 18:06:28,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:06:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-19 18:06:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-19 18:06:28,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:28,158 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:28,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:28,372 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 18:06:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1407287743, now seen corresponding path program 2 times [2020-10-19 18:06:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:28,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261993876] [2020-10-19 18:06:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:28,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:28,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-19 18:06:28,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261993876] [2020-10-19 18:06:28,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77008421] [2020-10-19 18:06:28,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:28,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:06:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 18:06:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:28,564 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:06:28,564 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:28,569 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:28,569 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:06:28,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 18:06:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-19 18:06:28,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:28,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-19 18:06:28,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718326345] [2020-10-19 18:06:28,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 18:06:28,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 18:06:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:06:28,809 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 16 states. [2020-10-19 18:06:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:29,386 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-10-19 18:06:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-19 18:06:29,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-19 18:06:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:29,388 INFO L225 Difference]: With dead ends: 108 [2020-10-19 18:06:29,388 INFO L226 Difference]: Without dead ends: 108 [2020-10-19 18:06:29,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-19 18:06:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-19 18:06:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-10-19 18:06:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 18:06:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-19 18:06:29,397 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 49 [2020-10-19 18:06:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:29,399 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-19 18:06:29,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 18:06:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-19 18:06:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 18:06:29,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:29,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:29,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 18:06:29,618 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 18:06:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2125667663, now seen corresponding path program 1 times [2020-10-19 18:06:29,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:29,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255533097] [2020-10-19 18:06:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:06:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-19 18:06:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-19 18:06:29,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255533097] [2020-10-19 18:06:29,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875241647] [2020-10-19 18:06:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:06:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:29,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:06:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 18:06:29,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:06:29,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-10-19 18:06:29,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763898915] [2020-10-19 18:06:29,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 18:06:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:06:29,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:06:29,908 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 13 states. [2020-10-19 18:06:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:30,269 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-10-19 18:06:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:06:30,270 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-19 18:06:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:30,271 INFO L225 Difference]: With dead ends: 118 [2020-10-19 18:06:30,271 INFO L226 Difference]: Without dead ends: 112 [2020-10-19 18:06:30,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:06:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-19 18:06:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-19 18:06:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-19 18:06:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-10-19 18:06:30,277 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 72 [2020-10-19 18:06:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:30,277 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-10-19 18:06:30,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 18:06:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-10-19 18:06:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-19 18:06:30,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:06:30,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:06:30,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 18:06:30,491 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 18:06:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:06:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 267240299, now seen corresponding path program 2 times [2020-10-19 18:06:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:06:30,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090429525] [2020-10-19 18:06:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:06:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:30,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:06:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:06:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:30,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:06:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 18:06:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:30,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-19 18:06:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:06:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-19 18:06:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090429525] [2020-10-19 18:06:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392126641] [2020-10-19 18:06:30,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:06:30,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:06:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:06:30,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:06:30,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:06:30,720 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2020-10-19 18:06:30,721 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:30,723 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:30,724 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 18:06:30,724 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-10-19 18:06:30,754 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2020-10-19 18:06:30,755 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:30,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:30,757 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 18:06:30,757 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-10-19 18:06:30,794 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2020-10-19 18:06:30,794 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:30,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:30,797 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 18:06:30,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-10-19 18:06:30,836 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2020-10-19 18:06:30,837 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:06:30,839 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:06:30,839 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 18:06:30,840 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-10-19 18:06:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-19 18:06:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:06:30,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2020-10-19 18:06:30,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654347092] [2020-10-19 18:06:30,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:06:30,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:06:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:06:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:06:30,909 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 6 states. [2020-10-19 18:06:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:06:30,992 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-19 18:06:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:06:30,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-19 18:06:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:06:30,993 INFO L225 Difference]: With dead ends: 97 [2020-10-19 18:06:30,993 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:06:30,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:06:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:06:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:06:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:06:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:06:30,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2020-10-19 18:06:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:06:30,997 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:06:30,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:06:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:06:30,997 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:06:31,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 18:06:31,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:06:31 BoogieIcfgContainer [2020-10-19 18:06:31,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:06:31,205 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:06:31,205 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:06:31,205 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:06:31,206 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:06:21" (3/4) ... [2020-10-19 18:06:31,209 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:06:31,215 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:06:31,215 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-10-19 18:06:31,215 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:06:31,223 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-10-19 18:06:31,223 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-10-19 18:06:31,223 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:06:31,223 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:06:31,265 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:06:31,265 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:06:31,267 INFO L168 Benchmark]: Toolchain (without parser) took 10365.37 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 272.6 MB). Free memory was 960.0 MB in the beginning and 938.3 MB in the end (delta: 21.7 MB). Peak memory consumption was 294.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:06:31,267 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:06:31,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.79 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 947.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:06:31,268 INFO L168 Benchmark]: Boogie Preprocessor took 97.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:06:31,268 INFO L168 Benchmark]: RCFGBuilder took 410.48 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:06:31,269 INFO L168 Benchmark]: TraceAbstraction took 9461.78 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Free memory was 1.1 GB in the beginning and 938.3 MB in the end (delta: 162.7 MB). Peak memory consumption was 300.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:06:31,269 INFO L168 Benchmark]: Witness Printer took 60.18 ms. Allocated memory is still 1.3 GB. Free memory is still 938.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:06:31,271 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 318.79 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 947.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 97.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 410.48 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9461.78 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Free memory was 1.1 GB in the beginning and 938.3 MB in the end (delta: 162.7 MB). Peak memory consumption was 300.1 MB. Max. memory is 11.5 GB. * Witness Printer took 60.18 ms. Allocated memory is still 1.3 GB. Free memory is still 938.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: 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 - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: 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: 9.3s, OverallIterations: 16, TraceHistogramMax: 5, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 372 SDtfs, 882 SDslu, 844 SDs, 0 SdLazy, 2298 SolverSat, 178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 456 SyntacticMatches, 18 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=15, 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, 16 MinimizatonAttempts, 140 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 931 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 905 ConstructedInterpolants, 91 QuantifiedInterpolants, 188970 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1183 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 661/776 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...