./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/termination-crafted/NonTermination3-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:24:59,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:24:59,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:24:59,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:24:59,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:24:59,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:24:59,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:24:59,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:24:59,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:24:59,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:24:59,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:24:59,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:24:59,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:24:59,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:24:59,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:24:59,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:24:59,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:24:59,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:24:59,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:24:59,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:24:59,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:24:59,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:24:59,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:24:59,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:24:59,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:24:59,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:24:59,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:24:59,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:24:59,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:24:59,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:24:59,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:24:59,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:24:59,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:24:59,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:24:59,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:24:59,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:24:59,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:24:59,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:24:59,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:24:59,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:24:59,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:24:59,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-10-19 18:24:59,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:24:59,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:24:59,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:24:59,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:24:59,497 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:24:59,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:24:59,498 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:24:59,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:24:59,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:24:59,498 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:24:59,499 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:24:59,499 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:24:59,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:24:59,499 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:24:59,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:24:59,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:24:59,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:24:59,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:24:59,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:24:59,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:24:59,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:24:59,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:24:59,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:24:59,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:24:59,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:24:59,503 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2020-10-19 18:24:59,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:24:59,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:24:59,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:24:59,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:24:59,854 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:24:59,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-10-19 18:24:59,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e8b8efd/8f6709519a7e49a2a17a8fdd94e21367/FLAG7adb3d04c [2020-10-19 18:25:00,331 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:25:00,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-10-19 18:25:00,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e8b8efd/8f6709519a7e49a2a17a8fdd94e21367/FLAG7adb3d04c [2020-10-19 18:25:00,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e8b8efd/8f6709519a7e49a2a17a8fdd94e21367 [2020-10-19 18:25:00,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:25:00,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:25:00,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:25:00,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:25:00,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:25:00,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:00,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236c7778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00, skipping insertion in model container [2020-10-19 18:25:00,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:00,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:25:00,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:25:00,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:25:00,947 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:25:00,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:25:00,988 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:25:00,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00 WrapperNode [2020-10-19 18:25:00,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:25:00,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:25:00,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:25:00,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:25:00,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:00,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:01,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:01,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:01,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:01,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:01,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (1/1) ... [2020-10-19 18:25:01,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:25:01,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:25:01,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:25:01,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:25:01,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (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 18:25:01,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:25:01,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:25:01,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:25:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:25:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:25:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:25:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:25:01,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:25:01,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:25:01,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:25:01,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:25:01,383 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:25:01,383 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 18:25:01,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:25:01 BoogieIcfgContainer [2020-10-19 18:25:01,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:25:01,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:25:01,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:25:01,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:25:01,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:25:00" (1/3) ... [2020-10-19 18:25:01,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af08c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:25:01, skipping insertion in model container [2020-10-19 18:25:01,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:25:00" (2/3) ... [2020-10-19 18:25:01,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af08c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:25:01, skipping insertion in model container [2020-10-19 18:25:01,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:25:01" (3/3) ... [2020-10-19 18:25:01,395 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2020-10-19 18:25:01,409 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:25:01,417 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-10-19 18:25:01,435 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-19 18:25:01,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:25:01,493 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:25:01,493 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:25:01,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:25:01,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:25:01,494 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:25:01,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:25:01,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:25:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-19 18:25:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:25:01,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:01,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:01,524 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:01,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2020-10-19 18:25:01,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:01,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270347886] [2020-10-19 18:25:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:01,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:01,798 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 18:25:01,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270347886] [2020-10-19 18:25:01,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:25:01,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:25:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814791097] [2020-10-19 18:25:01,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:25:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:25:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:25:01,824 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-19 18:25:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:01,933 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-19 18:25:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:25:01,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:25:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:01,944 INFO L225 Difference]: With dead ends: 33 [2020-10-19 18:25:01,944 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 18:25:01,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:25:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 18:25:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-19 18:25:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 18:25:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-19 18:25:01,980 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2020-10-19 18:25:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:01,980 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-19 18:25:01,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:25:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-19 18:25:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:25:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:01,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:01,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:25:01,982 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2020-10-19 18:25:01,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976798009] [2020-10-19 18:25:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,032 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 18:25:02,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976798009] [2020-10-19 18:25:02,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:25:02,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:25:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198102648] [2020-10-19 18:25:02,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:25:02,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:25:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:25:02,037 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-10-19 18:25:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:02,094 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-19 18:25:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:25:02,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:25:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:02,096 INFO L225 Difference]: With dead ends: 24 [2020-10-19 18:25:02,096 INFO L226 Difference]: Without dead ends: 24 [2020-10-19 18:25:02,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:25:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-19 18:25:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-19 18:25:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 18:25:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-19 18:25:02,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2020-10-19 18:25:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:02,103 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-19 18:25:02,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:25:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-19 18:25:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:25:02,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:02,105 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:02,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:25:02,105 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:02,106 INFO L82 PathProgramCache]: Analyzing trace with hash 707835031, now seen corresponding path program 1 times [2020-10-19 18:25:02,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:02,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880570624] [2020-10-19 18:25:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:02,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880570624] [2020-10-19 18:25:02,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291960756] [2020-10-19 18:25:02,237 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 18:25:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:25:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:02,369 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 18:25:02,370 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:25:02,380 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:25:02,381 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:25:02,381 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 18:25:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:02,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:02,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-10-19 18:25:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607639808] [2020-10-19 18:25:02,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:25:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:25:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:25:02,411 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-19 18:25:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:02,508 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-19 18:25:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:25:02,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-19 18:25:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:02,510 INFO L225 Difference]: With dead ends: 30 [2020-10-19 18:25:02,510 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 18:25:02,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:25:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 18:25:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-19 18:25:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:25:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-19 18:25:02,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2020-10-19 18:25:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:02,516 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-19 18:25:02,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:25:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-19 18:25:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:25:02,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:02,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:02,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 18:25:02,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash 671779276, now seen corresponding path program 1 times [2020-10-19 18:25:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:02,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209215264] [2020-10-19 18:25:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 18:25:02,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209215264] [2020-10-19 18:25:02,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:25:02,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:25:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720938952] [2020-10-19 18:25:02,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:25:02,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:02,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:25:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:25:02,856 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-19 18:25:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:02,962 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-19 18:25:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:25:02,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-19 18:25:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:02,964 INFO L225 Difference]: With dead ends: 33 [2020-10-19 18:25:02,964 INFO L226 Difference]: Without dead ends: 33 [2020-10-19 18:25:02,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:25:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-19 18:25:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-19 18:25:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:25:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-19 18:25:02,970 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-19 18:25:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:02,971 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-19 18:25:02,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:25:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-19 18:25:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:25:02,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:02,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:02,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:25:02,973 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -649672835, now seen corresponding path program 1 times [2020-10-19 18:25:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:02,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383145072] [2020-10-19 18:25:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 18:25:03,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383145072] [2020-10-19 18:25:03,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:25:03,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:25:03,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902760206] [2020-10-19 18:25:03,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:25:03,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:03,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:25:03,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:25:03,030 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-19 18:25:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:03,066 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-19 18:25:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:25:03,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:25:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:03,068 INFO L225 Difference]: With dead ends: 30 [2020-10-19 18:25:03,068 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 18:25:03,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:25:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 18:25:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-19 18:25:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:25:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-19 18:25:03,074 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-19 18:25:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:03,075 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-19 18:25:03,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:25:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-19 18:25:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:25:03,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:03,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:03,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:25:03,077 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1334976847, now seen corresponding path program 1 times [2020-10-19 18:25:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:03,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92216076] [2020-10-19 18:25:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92216076] [2020-10-19 18:25:03,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200120448] [2020-10-19 18:25:03,159 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 18:25:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:25:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:03,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:03,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-19 18:25:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771002358] [2020-10-19 18:25:03,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:25:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:25:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:25:03,249 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-19 18:25:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:03,306 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-19 18:25:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:25:03,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-19 18:25:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:03,308 INFO L225 Difference]: With dead ends: 37 [2020-10-19 18:25:03,308 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 18:25:03,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:25:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 18:25:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-19 18:25:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 18:25:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-19 18:25:03,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-10-19 18:25:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:03,314 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-19 18:25:03,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:25:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-19 18:25:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:25:03,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:03,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:03,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:03,519 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:03,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 2 times [2020-10-19 18:25:03,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:03,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310211864] [2020-10-19 18:25:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310211864] [2020-10-19 18:25:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547597397] [2020-10-19 18:25:03,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:03,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:25:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:25:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:25:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-19 18:25:03,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:25:03,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-10-19 18:25:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814287022] [2020-10-19 18:25:03,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:25:03,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:25:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:25:03,703 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-10-19 18:25:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:03,740 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-19 18:25:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:25:03,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-19 18:25:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:03,741 INFO L225 Difference]: With dead ends: 33 [2020-10-19 18:25:03,742 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 18:25:03,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:25:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 18:25:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-19 18:25:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:25:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-19 18:25:03,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2020-10-19 18:25:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:03,747 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-19 18:25:03,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:25:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-19 18:25:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:25:03,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:03,749 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:03,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:03,959 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash -775549161, now seen corresponding path program 1 times [2020-10-19 18:25:03,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:03,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128400596] [2020-10-19 18:25:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:04,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128400596] [2020-10-19 18:25:04,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71418533] [2020-10-19 18:25:04,052 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 18:25:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:25:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:04,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:04,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-19 18:25:04,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136443305] [2020-10-19 18:25:04,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:25:04,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:04,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:25:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:25:04,142 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-10-19 18:25:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:04,210 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-19 18:25:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:25:04,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-19 18:25:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:04,211 INFO L225 Difference]: With dead ends: 37 [2020-10-19 18:25:04,212 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 18:25:04,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:25:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 18:25:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-19 18:25:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 18:25:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-19 18:25:04,217 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-10-19 18:25:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:04,218 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-19 18:25:04,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:25:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-19 18:25:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:25:04,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:04,219 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:04,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:04,432 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash -105276236, now seen corresponding path program 2 times [2020-10-19 18:25:04,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:04,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068846930] [2020-10-19 18:25:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:04,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068846930] [2020-10-19 18:25:04,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133097171] [2020-10-19 18:25:04,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:04,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:25:04,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:25:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:25:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:04,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:04,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-19 18:25:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946594565] [2020-10-19 18:25:04,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:25:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:25:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:25:04,599 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-10-19 18:25:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:04,660 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-19 18:25:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:25:04,660 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-19 18:25:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:04,661 INFO L225 Difference]: With dead ends: 41 [2020-10-19 18:25:04,662 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 18:25:04,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:25:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 18:25:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-19 18:25:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 18:25:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-19 18:25:04,667 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-10-19 18:25:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:04,667 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-19 18:25:04,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:25:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-19 18:25:04,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-19 18:25:04,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:04,669 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:04,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:04,881 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1144843311, now seen corresponding path program 3 times [2020-10-19 18:25:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:04,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720970524] [2020-10-19 18:25:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:04,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:05,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720970524] [2020-10-19 18:25:05,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637014356] [2020-10-19 18:25:05,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:25:05,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-19 18:25:05,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:25:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:25:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:05,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-19 18:25:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380665502] [2020-10-19 18:25:05,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:25:05,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:05,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:25:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:25:05,186 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-10-19 18:25:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:05,293 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-19 18:25:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:25:05,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-19 18:25:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:05,296 INFO L225 Difference]: With dead ends: 45 [2020-10-19 18:25:05,296 INFO L226 Difference]: Without dead ends: 45 [2020-10-19 18:25:05,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:25:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-19 18:25:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-19 18:25:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 18:25:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-19 18:25:05,302 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-10-19 18:25:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:05,302 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-19 18:25:05,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:25:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-19 18:25:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-19 18:25:05,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:05,304 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:05,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:05,505 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash -539904914, now seen corresponding path program 4 times [2020-10-19 18:25:05,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:05,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850001437] [2020-10-19 18:25:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:05,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:05,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850001437] [2020-10-19 18:25:05,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942023575] [2020-10-19 18:25:05,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:25:05,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:25:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:25:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:25:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:05,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:05,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-19 18:25:05,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644645339] [2020-10-19 18:25:05,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:25:05,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:25:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:25:05,750 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-10-19 18:25:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:05,821 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-19 18:25:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:25:05,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-19 18:25:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:05,822 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:25:05,822 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:25:05,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:25:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:25:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-19 18:25:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-19 18:25:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-19 18:25:05,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-10-19 18:25:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:05,827 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-19 18:25:05,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:25:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-19 18:25:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-19 18:25:05,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:05,829 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:06,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:06,040 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash 607436427, now seen corresponding path program 5 times [2020-10-19 18:25:06,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:06,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679026225] [2020-10-19 18:25:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:06,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:06,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679026225] [2020-10-19 18:25:06,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472514034] [2020-10-19 18:25:06,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:25:06,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-19 18:25:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:25:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:25:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:06,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:06,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-19 18:25:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114006922] [2020-10-19 18:25:06,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 18:25:06,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:25:06,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:25:06,267 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-10-19 18:25:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:06,349 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-19 18:25:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:25:06,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-19 18:25:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:06,351 INFO L225 Difference]: With dead ends: 53 [2020-10-19 18:25:06,351 INFO L226 Difference]: Without dead ends: 53 [2020-10-19 18:25:06,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:25:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-19 18:25:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-19 18:25:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-19 18:25:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-19 18:25:06,361 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-10-19 18:25:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:06,361 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-19 18:25:06,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 18:25:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-19 18:25:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-19 18:25:06,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:06,364 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:06,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 18:25:06,566 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash 228291112, now seen corresponding path program 6 times [2020-10-19 18:25:06,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:06,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140595988] [2020-10-19 18:25:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:06,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:25:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:25:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:06,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140595988] [2020-10-19 18:25:06,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506709831] [2020-10-19 18:25:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:25:06,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-19 18:25:06,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:25:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:25:06,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:25:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:25:06,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:25:06,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-19 18:25:06,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551989978] [2020-10-19 18:25:06,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 18:25:06,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:25:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 18:25:06,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:25:06,828 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-10-19 18:25:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:25:06,908 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-19 18:25:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:25:06,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-19 18:25:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:25:06,909 INFO L225 Difference]: With dead ends: 54 [2020-10-19 18:25:06,909 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:25:06,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:25:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:25:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-19 18:25:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:25:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-19 18:25:06,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-10-19 18:25:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:25:06,913 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-19 18:25:06,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 18:25:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-19 18:25:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-19 18:25:06,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:25:06,914 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:25:07,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:25:07,115 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:25:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:25:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 7 times [2020-10-19 18:25:07,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:25:07,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121112690] [2020-10-19 18:25:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:25:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:25:07,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:25:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:25:07,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:25:07,198 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:25:07,199 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:25:07,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:25:07,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:25:07 BoogieIcfgContainer [2020-10-19 18:25:07,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:25:07,239 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:25:07,239 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:25:07,239 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:25:07,240 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:25:01" (3/4) ... [2020-10-19 18:25:07,242 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:25:07,307 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:25:07,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:25:07,309 INFO L168 Benchmark]: Toolchain (without parser) took 6583.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 960.0 MB in the beginning and 1.0 GB in the end (delta: -51.9 MB). Peak memory consumption was 144.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:25:07,309 INFO L168 Benchmark]: CDTParser took 0.19 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 18:25:07,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.26 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:25:07,311 INFO L168 Benchmark]: Boogie Preprocessor took 88.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -165.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:25:07,311 INFO L168 Benchmark]: RCFGBuilder took 307.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:25:07,312 INFO L168 Benchmark]: TraceAbstraction took 5851.26 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 82.4 MB). Peak memory consumption was 153.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:25:07,312 INFO L168 Benchmark]: Witness Printer took 68.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:25:07,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 256.26 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 88.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -165.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 307.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5851.26 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 82.4 MB). Peak memory consumption was 153.7 MB. Max. memory is 11.5 GB. * Witness Printer took 68.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; VAL [a={2:0}, i=0, n=0] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, a={2:0}, i=0, n=0] [L13] ++n VAL [a={2:0}, i=0, n=1] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, a={2:0}, i=0, n=1] [L13] ++n VAL [a={2:0}, i=0, n=2] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=3, a={2:0}, i=0, n=2] [L13] ++n VAL [a={2:0}, i=0, n=3] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, a={2:0}, i=0, n=3] [L13] ++n VAL [a={2:0}, i=0, n=4] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-4, a={2:0}, i=0, n=4] [L13] ++n VAL [a={2:0}, i=0, n=5] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, a={2:0}, i=0, n=5] [L13] ++n VAL [a={2:0}, i=0, n=6] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-5, a={2:0}, i=0, n=6] [L13] ++n VAL [a={2:0}, i=0, n=7] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=6, a={2:0}, i=0, n=7] [L13] ++n VAL [a={2:0}, i=0, n=8] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-6, a={2:0}, i=0, n=8] [L13] ++n VAL [a={2:0}, i=0, n=9] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=7, a={2:0}, i=0, n=9] [L13] ++n VAL [a={2:0}, i=0, n=10] [L13] COND FALSE !(n < 10) VAL [a={2:0}, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, i=0, n=10] [L17] EXPR a[i] VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=9, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=9, i=0, n=10] [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 208 SDslu, 581 SDs, 0 SdLazy, 608 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 25 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 710 NumberOfCodeBlocks, 694 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 635 ConstructedInterpolants, 1 QuantifiedInterpolants, 63976 SizeOfPredicates, 7 NumberOfNonLiveVariables, 967 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 58/1126 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 incorrect! Received shutdown request...