/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:08:57,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:08:57,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:08:57,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:08:57,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:08:57,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:08:57,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:08:58,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:08:58,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:08:58,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:08:58,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:08:58,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:08:58,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:08:58,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:08:58,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:08:58,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:08:58,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:08:58,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:08:58,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:08:58,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:08:58,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:08:58,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:08:58,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:08:58,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:08:58,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:08:58,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:08:58,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:08:58,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:08:58,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:08:58,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:08:58,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:08:58,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:08:58,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:08:58,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:08:58,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:08:58,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:08:58,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:08:58,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:08:58,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:08:58,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:08:58,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:08:58,115 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:08:58,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:08:58,115 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:08:58,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:08:58,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:08:58,116 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:08:58,119 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:08:58,119 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:08:58,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:08:58,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:08:58,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:08:58,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:08:58,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:08:58,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:08:58,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:08:58,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:08:58,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:08:58,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:08:58,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:08:58,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:08:58,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:08:58,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:08:58,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:08:58,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:08:58,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:08:58,660 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:08:58,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-01-07 05:08:58,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3aacaa899/9ceec6ed975b42d2a5f2162e88baf0a1/FLAG8b6c4b506 [2021-01-07 05:08:59,569 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:08:59,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-01-07 05:08:59,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3aacaa899/9ceec6ed975b42d2a5f2162e88baf0a1/FLAG8b6c4b506 [2021-01-07 05:08:59,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3aacaa899/9ceec6ed975b42d2a5f2162e88baf0a1 [2021-01-07 05:08:59,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:08:59,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:08:59,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:08:59,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:08:59,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:08:59,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:08:59" (1/1) ... [2021-01-07 05:08:59,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfc2f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:59, skipping insertion in model container [2021-01-07 05:08:59,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:08:59" (1/1) ... [2021-01-07 05:08:59,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:08:59,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-07 05:09:00,127 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-01-07 05:09:00,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:00,166 INFO L203 MainTranslator]: Completed pre-run [2021-01-07 05:09:00,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-01-07 05:09:00,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:00,225 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:09:00,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00 WrapperNode [2021-01-07 05:09:00,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:00,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:00,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:09:00,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:09:00,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:00,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:09:00,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:09:00,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:09:00,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... [2021-01-07 05:09:00,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:09:00,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:09:00,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:09:00,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:09:00,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-07 05:09:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-01-07 05:09:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-01-07 05:09:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:09:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:09:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:09:00,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:09:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:09:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:09:00,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:09:00,877 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-01-07 05:09:00,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:00 BoogieIcfgContainer [2021-01-07 05:09:00,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:09:00,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:09:00,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:09:00,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:09:00,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:08:59" (1/3) ... [2021-01-07 05:09:00,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b0f819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:00, skipping insertion in model container [2021-01-07 05:09:00,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:00" (2/3) ... [2021-01-07 05:09:00,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b0f819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:00, skipping insertion in model container [2021-01-07 05:09:00,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:00" (3/3) ... [2021-01-07 05:09:00,889 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-01-07 05:09:00,896 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:09:00,902 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2021-01-07 05:09:00,924 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-01-07 05:09:00,950 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:09:00,951 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:09:00,951 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:09:00,951 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:09:00,951 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:09:00,951 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:09:00,951 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:09:00,952 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:09:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2021-01-07 05:09:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:09:00,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:00,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:00,983 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1701045346, now seen corresponding path program 1 times [2021-01-07 05:09:01,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:01,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957086368] [2021-01-07 05:09:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957086368] [2021-01-07 05:09:01,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:01,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:01,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298237675] [2021-01-07 05:09:01,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-07 05:09:01,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-07 05:09:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-07 05:09:01,237 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2021-01-07 05:09:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:01,268 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-07 05:09:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-07 05:09:01,270 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-07 05:09:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:01,281 INFO L225 Difference]: With dead ends: 61 [2021-01-07 05:09:01,282 INFO L226 Difference]: Without dead ends: 59 [2021-01-07 05:09:01,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-07 05:09:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-07 05:09:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-07 05:09:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-07 05:09:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-01-07 05:09:01,341 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 12 [2021-01-07 05:09:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:01,341 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-01-07 05:09:01,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-07 05:09:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-01-07 05:09:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:09:01,343 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:01,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:01,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:09:01,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 498671710, now seen corresponding path program 1 times [2021-01-07 05:09:01,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:01,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813516315] [2021-01-07 05:09:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:01,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813516315] [2021-01-07 05:09:01,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:01,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:09:01,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441446547] [2021-01-07 05:09:01,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:01,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:01,622 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 5 states. [2021-01-07 05:09:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:01,852 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-07 05:09:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:09:01,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-07 05:09:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:01,857 INFO L225 Difference]: With dead ends: 108 [2021-01-07 05:09:01,858 INFO L226 Difference]: Without dead ends: 108 [2021-01-07 05:09:01,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:09:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-07 05:09:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2021-01-07 05:09:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-07 05:09:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2021-01-07 05:09:01,881 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 12 [2021-01-07 05:09:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:01,882 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2021-01-07 05:09:01,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2021-01-07 05:09:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:09:01,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:01,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:01,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:09:01,888 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:01,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1812361920, now seen corresponding path program 1 times [2021-01-07 05:09:01,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:01,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530016895] [2021-01-07 05:09:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:02,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530016895] [2021-01-07 05:09:02,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:02,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:09:02,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026551872] [2021-01-07 05:09:02,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:09:02,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:02,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:09:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:02,019 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 4 states. [2021-01-07 05:09:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:02,087 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-01-07 05:09:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:09:02,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-07 05:09:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:02,089 INFO L225 Difference]: With dead ends: 76 [2021-01-07 05:09:02,089 INFO L226 Difference]: Without dead ends: 76 [2021-01-07 05:09:02,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-07 05:09:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-01-07 05:09:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-07 05:09:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2021-01-07 05:09:02,100 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 14 [2021-01-07 05:09:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:02,101 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2021-01-07 05:09:02,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:09:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2021-01-07 05:09:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:09:02,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:02,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:02,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:09:02,103 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1812361919, now seen corresponding path program 1 times [2021-01-07 05:09:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:02,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578377885] [2021-01-07 05:09:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578377885] [2021-01-07 05:09:02,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:02,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-07 05:09:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728857660] [2021-01-07 05:09:02,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:09:02,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:09:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:09:02,277 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 7 states. [2021-01-07 05:09:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:02,400 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-01-07 05:09:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:09:02,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-07 05:09:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:02,403 INFO L225 Difference]: With dead ends: 74 [2021-01-07 05:09:02,403 INFO L226 Difference]: Without dead ends: 74 [2021-01-07 05:09:02,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:09:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-07 05:09:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-07 05:09:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-07 05:09:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-01-07 05:09:02,429 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 14 [2021-01-07 05:09:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:02,429 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-01-07 05:09:02,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:09:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-01-07 05:09:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:09:02,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:02,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:02,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:09:02,431 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash -359056604, now seen corresponding path program 1 times [2021-01-07 05:09:02,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:02,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463238676] [2021-01-07 05:09:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:02,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463238676] [2021-01-07 05:09:02,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:02,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:09:02,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377042474] [2021-01-07 05:09:02,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:09:02,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:02,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:09:02,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:09:02,565 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 6 states. [2021-01-07 05:09:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:02,686 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-01-07 05:09:02,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:09:02,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-07 05:09:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:02,690 INFO L225 Difference]: With dead ends: 70 [2021-01-07 05:09:02,690 INFO L226 Difference]: Without dead ends: 70 [2021-01-07 05:09:02,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:09:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-07 05:09:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-01-07 05:09:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-07 05:09:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-01-07 05:09:02,712 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 15 [2021-01-07 05:09:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:02,712 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-01-07 05:09:02,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:09:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-01-07 05:09:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:09:02,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:02,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:02,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:09:02,718 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash -359056603, now seen corresponding path program 1 times [2021-01-07 05:09:02,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:02,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412417361] [2021-01-07 05:09:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:02,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412417361] [2021-01-07 05:09:02,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:02,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-07 05:09:02,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755664003] [2021-01-07 05:09:02,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:09:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:02,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:09:02,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:09:02,855 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 7 states. [2021-01-07 05:09:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:03,108 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-01-07 05:09:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:09:03,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-07 05:09:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:03,110 INFO L225 Difference]: With dead ends: 90 [2021-01-07 05:09:03,110 INFO L226 Difference]: Without dead ends: 90 [2021-01-07 05:09:03,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:09:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-07 05:09:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2021-01-07 05:09:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-07 05:09:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-01-07 05:09:03,116 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 15 [2021-01-07 05:09:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:03,116 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-01-07 05:09:03,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:09:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-01-07 05:09:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-07 05:09:03,117 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:03,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:03,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:09:03,118 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2076916866, now seen corresponding path program 1 times [2021-01-07 05:09:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:03,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988322840] [2021-01-07 05:09:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:03,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:03,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988322840] [2021-01-07 05:09:03,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:03,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-07 05:09:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666908835] [2021-01-07 05:09:03,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:09:03,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:09:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:09:03,218 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2021-01-07 05:09:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:03,485 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-01-07 05:09:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:09:03,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-07 05:09:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:03,487 INFO L225 Difference]: With dead ends: 111 [2021-01-07 05:09:03,488 INFO L226 Difference]: Without dead ends: 111 [2021-01-07 05:09:03,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:09:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-07 05:09:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2021-01-07 05:09:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-07 05:09:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2021-01-07 05:09:03,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 16 [2021-01-07 05:09:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:03,496 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2021-01-07 05:09:03,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:09:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2021-01-07 05:09:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-07 05:09:03,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:03,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:03,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:09:03,497 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1754147206, now seen corresponding path program 1 times [2021-01-07 05:09:03,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:03,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084050294] [2021-01-07 05:09:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:03,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084050294] [2021-01-07 05:09:03,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:03,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-07 05:09:03,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498547339] [2021-01-07 05:09:03,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:09:03,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:09:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:09:03,605 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 8 states. [2021-01-07 05:09:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:03,880 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2021-01-07 05:09:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:03,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-07 05:09:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:03,882 INFO L225 Difference]: With dead ends: 93 [2021-01-07 05:09:03,882 INFO L226 Difference]: Without dead ends: 93 [2021-01-07 05:09:03,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:09:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-07 05:09:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-01-07 05:09:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-07 05:09:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-01-07 05:09:03,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 16 [2021-01-07 05:09:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:03,888 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-01-07 05:09:03,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:09:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-01-07 05:09:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-07 05:09:03,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:03,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:03,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-07 05:09:03,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:03,891 INFO L82 PathProgramCache]: Analyzing trace with hash 131457149, now seen corresponding path program 1 times [2021-01-07 05:09:03,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:03,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170909247] [2021-01-07 05:09:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:03,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170909247] [2021-01-07 05:09:04,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:04,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-07 05:09:04,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847930644] [2021-01-07 05:09:04,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-07 05:09:04,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-07 05:09:04,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:09:04,002 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 9 states. [2021-01-07 05:09:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:04,163 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-01-07 05:09:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:04,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2021-01-07 05:09:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:04,165 INFO L225 Difference]: With dead ends: 74 [2021-01-07 05:09:04,165 INFO L226 Difference]: Without dead ends: 74 [2021-01-07 05:09:04,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:09:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-07 05:09:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-07 05:09:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-07 05:09:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-01-07 05:09:04,170 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 19 [2021-01-07 05:09:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:04,171 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-01-07 05:09:04,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-07 05:09:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-01-07 05:09:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-07 05:09:04,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:04,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:04,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-07 05:09:04,173 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -219791608, now seen corresponding path program 1 times [2021-01-07 05:09:04,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:04,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799948461] [2021-01-07 05:09:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:04,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:04,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799948461] [2021-01-07 05:09:04,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:04,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:09:04,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101737854] [2021-01-07 05:09:04,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:09:04,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:09:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:09:04,212 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 4 states. [2021-01-07 05:09:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:04,239 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-01-07 05:09:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:09:04,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-01-07 05:09:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:04,241 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:09:04,241 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:09:04,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:09:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-07 05:09:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-07 05:09:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-01-07 05:09:04,246 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 20 [2021-01-07 05:09:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:04,246 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-01-07 05:09:04,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:09:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-01-07 05:09:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-07 05:09:04,247 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:04,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:04,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-07 05:09:04,248 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash -207239485, now seen corresponding path program 1 times [2021-01-07 05:09:04,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:04,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737004852] [2021-01-07 05:09:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:04,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737004852] [2021-01-07 05:09:04,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764129876] [2021-01-07 05:09:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-07 05:09:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:04,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:04,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-07 05:09:04,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515764114] [2021-01-07 05:09:04,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-07 05:09:04,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:04,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-07 05:09:04,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:09:04,594 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 10 states. [2021-01-07 05:09:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:04,910 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-01-07 05:09:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-07 05:09:04,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-07 05:09:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:04,912 INFO L225 Difference]: With dead ends: 90 [2021-01-07 05:09:04,912 INFO L226 Difference]: Without dead ends: 90 [2021-01-07 05:09:04,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:09:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-07 05:09:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2021-01-07 05:09:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-07 05:09:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-01-07 05:09:04,917 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 22 [2021-01-07 05:09:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:04,918 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-01-07 05:09:04,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-07 05:09:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-01-07 05:09:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-07 05:09:04,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:04,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:05,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-07 05:09:05,134 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash -766335477, now seen corresponding path program 1 times [2021-01-07 05:09:05,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:05,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101886474] [2021-01-07 05:09:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:05,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:05,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101886474] [2021-01-07 05:09:05,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:05,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:09:05,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668656643] [2021-01-07 05:09:05,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:05,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:05,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:05,219 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 5 states. [2021-01-07 05:09:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:05,281 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-01-07 05:09:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:09:05,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-07 05:09:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:05,283 INFO L225 Difference]: With dead ends: 70 [2021-01-07 05:09:05,283 INFO L226 Difference]: Without dead ends: 60 [2021-01-07 05:09:05,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:09:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-07 05:09:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-07 05:09:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-07 05:09:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-01-07 05:09:05,290 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2021-01-07 05:09:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:05,290 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-01-07 05:09:05,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-01-07 05:09:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-07 05:09:05,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:05,293 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:05,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-07 05:09:05,294 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1588183672, now seen corresponding path program 1 times [2021-01-07 05:09:05,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:05,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486051373] [2021-01-07 05:09:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:05,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-01-07 05:09:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:05,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486051373] [2021-01-07 05:09:05,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518908377] [2021-01-07 05:09:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-07 05:09:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:06,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:06,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-01-07 05:09:06,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787633334] [2021-01-07 05:09:06,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-07 05:09:06,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:06,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-07 05:09:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:09:06,051 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 19 states. [2021-01-07 05:09:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:06,950 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2021-01-07 05:09:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:09:06,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2021-01-07 05:09:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:06,952 INFO L225 Difference]: With dead ends: 130 [2021-01-07 05:09:06,953 INFO L226 Difference]: Without dead ends: 128 [2021-01-07 05:09:06,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-01-07 05:09:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-07 05:09:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-01-07 05:09:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-07 05:09:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-01-07 05:09:06,959 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 24 [2021-01-07 05:09:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:06,960 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-01-07 05:09:06,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-07 05:09:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-01-07 05:09:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-07 05:09:06,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:06,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:07,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-07 05:09:07,176 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1999585632, now seen corresponding path program 1 times [2021-01-07 05:09:07,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:07,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469643723] [2021-01-07 05:09:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469643723] [2021-01-07 05:09:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281459669] [2021-01-07 05:09:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-07 05:09:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:07,488 INFO L382 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 8 treesize of output 7 [2021-01-07 05:09:07,489 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:07,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:07,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:07,497 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-01-07 05:09:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:07,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:07,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-01-07 05:09:07,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493278996] [2021-01-07 05:09:07,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-07 05:09:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-07 05:09:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:07,767 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand 17 states. [2021-01-07 05:09:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:08,478 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2021-01-07 05:09:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:09:08,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2021-01-07 05:09:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:08,481 INFO L225 Difference]: With dead ends: 146 [2021-01-07 05:09:08,481 INFO L226 Difference]: Without dead ends: 146 [2021-01-07 05:09:08,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:09:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-07 05:09:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 97. [2021-01-07 05:09:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-07 05:09:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2021-01-07 05:09:08,489 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 25 [2021-01-07 05:09:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:08,489 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2021-01-07 05:09:08,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-07 05:09:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2021-01-07 05:09:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-07 05:09:08,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:08,490 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:08,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-07 05:09:08,705 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:08,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1531117911, now seen corresponding path program 1 times [2021-01-07 05:09:08,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:08,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742010739] [2021-01-07 05:09:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:08,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-01-07 05:09:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742010739] [2021-01-07 05:09:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93658659] [2021-01-07 05:09:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:09:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:09,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:09,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-01-07 05:09:09,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806973626] [2021-01-07 05:09:09,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:09:09,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:09:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:09:09,414 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 25 states. [2021-01-07 05:09:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:11,009 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2021-01-07 05:09:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-07 05:09:11,010 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2021-01-07 05:09:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:11,012 INFO L225 Difference]: With dead ends: 194 [2021-01-07 05:09:11,012 INFO L226 Difference]: Without dead ends: 194 [2021-01-07 05:09:11,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-01-07 05:09:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-01-07 05:09:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 118. [2021-01-07 05:09:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-07 05:09:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2021-01-07 05:09:11,022 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 26 [2021-01-07 05:09:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:11,023 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2021-01-07 05:09:11,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:09:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2021-01-07 05:09:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-07 05:09:11,024 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:11,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:11,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:11,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1857612437, now seen corresponding path program 1 times [2021-01-07 05:09:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:11,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161721484] [2021-01-07 05:09:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:11,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161721484] [2021-01-07 05:09:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862845128] [2021-01-07 05:09:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-07 05:09:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:11,528 INFO L382 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 8 treesize of output 7 [2021-01-07 05:09:11,529 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:11,533 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:11,534 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:11,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-01-07 05:09:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:11,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:11,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-01-07 05:09:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091719164] [2021-01-07 05:09:11,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-07 05:09:11,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-07 05:09:11,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-01-07 05:09:11,833 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 17 states. [2021-01-07 05:09:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:12,462 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2021-01-07 05:09:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:09:12,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2021-01-07 05:09:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:12,464 INFO L225 Difference]: With dead ends: 165 [2021-01-07 05:09:12,464 INFO L226 Difference]: Without dead ends: 165 [2021-01-07 05:09:12,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-01-07 05:09:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-07 05:09:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2021-01-07 05:09:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-07 05:09:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-01-07 05:09:12,478 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 26 [2021-01-07 05:09:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:12,478 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-01-07 05:09:12,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-07 05:09:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-01-07 05:09:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-07 05:09:12,479 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:12,479 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:12,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-07 05:09:12,683 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:12,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1924144921, now seen corresponding path program 1 times [2021-01-07 05:09:12,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:12,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272494292] [2021-01-07 05:09:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-01-07 05:09:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:12,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272494292] [2021-01-07 05:09:12,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676212718] [2021-01-07 05:09:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:09:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:12,859 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 6 [2021-01-07 05:09:12,859 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:12,861 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:12,863 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:12,863 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2021-01-07 05:09:12,909 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-01-07 05:09:12,910 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:12,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:12,916 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:12,916 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2021-01-07 05:09:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:12,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:09:12,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-01-07 05:09:12,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787756752] [2021-01-07 05:09:12,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:09:12,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:09:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-07 05:09:12,967 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 8 states. [2021-01-07 05:09:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:13,076 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-01-07 05:09:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:09:13,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-07 05:09:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:13,079 INFO L225 Difference]: With dead ends: 64 [2021-01-07 05:09:13,080 INFO L226 Difference]: Without dead ends: 64 [2021-01-07 05:09:13,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:09:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-07 05:09:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-07 05:09:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:09:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-07 05:09:13,084 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 26 [2021-01-07 05:09:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:13,086 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-07 05:09:13,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:09:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-07 05:09:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-07 05:09:13,088 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:13,088 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:13,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-07 05:09:13,302 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -980974189, now seen corresponding path program 1 times [2021-01-07 05:09:13,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:13,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918922422] [2021-01-07 05:09:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-01-07 05:09:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918922422] [2021-01-07 05:09:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777857941] [2021-01-07 05:09:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-07 05:09:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:13,570 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 treesize of output 6 [2021-01-07 05:09:13,570 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:13,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:13,575 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:13,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2021-01-07 05:09:19,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-01-07 05:09:19,801 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:19,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:19,809 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:19,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2021-01-07 05:09:19,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:09:19,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:09:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:19,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2021-01-07 05:09:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220220462] [2021-01-07 05:09:19,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-07 05:09:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-07 05:09:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=394, Unknown=3, NotChecked=0, Total=462 [2021-01-07 05:09:19,885 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 22 states. [2021-01-07 05:09:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:22,354 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-01-07 05:09:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:09:22,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2021-01-07 05:09:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:22,355 INFO L225 Difference]: With dead ends: 62 [2021-01-07 05:09:22,355 INFO L226 Difference]: Without dead ends: 62 [2021-01-07 05:09:22,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=152, Invalid=715, Unknown=3, NotChecked=0, Total=870 [2021-01-07 05:09:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-07 05:09:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-07 05:09:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-07 05:09:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-01-07 05:09:22,359 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 29 [2021-01-07 05:09:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:22,360 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-01-07 05:09:22,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-07 05:09:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-01-07 05:09:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-07 05:09:22,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:22,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:22,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-07 05:09:22,562 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969094, now seen corresponding path program 1 times [2021-01-07 05:09:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:22,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070170637] [2021-01-07 05:09:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:22,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:22,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-01-07 05:09:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:09:22,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070170637] [2021-01-07 05:09:22,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486176206] [2021-01-07 05:09:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-07 05:09:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:22,952 INFO L382 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 8 treesize of output 7 [2021-01-07 05:09:22,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:22,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:22,957 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:22,958 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-01-07 05:09:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:09:23,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:23,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-01-07 05:09:23,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888097215] [2021-01-07 05:09:23,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:09:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:09:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:09:23,513 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 25 states. [2021-01-07 05:09:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:25,707 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-01-07 05:09:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-07 05:09:25,708 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2021-01-07 05:09:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:25,709 INFO L225 Difference]: With dead ends: 71 [2021-01-07 05:09:25,709 INFO L226 Difference]: Without dead ends: 53 [2021-01-07 05:09:25,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-01-07 05:09:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-07 05:09:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-01-07 05:09:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-07 05:09:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-07 05:09:25,713 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2021-01-07 05:09:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:25,713 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-07 05:09:25,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:09:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-07 05:09:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-07 05:09:25,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:25,714 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:25,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:25,924 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2021-01-07 05:09:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1205791223, now seen corresponding path program 1 times [2021-01-07 05:09:25,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:25,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352135869] [2021-01-07 05:09:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-01-07 05:09:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:26,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-01-07 05:09:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:26,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352135869] [2021-01-07 05:09:26,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410551692] [2021-01-07 05:09:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-07 05:09:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-07 05:09:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:09:26,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:26,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-01-07 05:09:26,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429144997] [2021-01-07 05:09:26,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-07 05:09:26,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-07 05:09:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-01-07 05:09:26,811 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 30 states. [2021-01-07 05:09:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:28,110 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-07 05:09:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-07 05:09:28,111 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 45 [2021-01-07 05:09:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:28,112 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:09:28,112 INFO L226 Difference]: Without dead ends: 0 [2021-01-07 05:09:28,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2021-01-07 05:09:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-07 05:09:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-07 05:09:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-07 05:09:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-07 05:09:28,113 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-01-07 05:09:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:28,113 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-07 05:09:28,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-07 05:09:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-07 05:09:28,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-07 05:09:28,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:28,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:09:28 BoogieIcfgContainer [2021-01-07 05:09:28,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:09:28,322 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:09:28,322 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:09:28,322 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:09:28,323 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:00" (3/4) ... [2021-01-07 05:09:28,326 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-07 05:09:28,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-01-07 05:09:28,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-01-07 05:09:28,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-01-07 05:09:28,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-07 05:09:28,347 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-07 05:09:28,421 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec_onepoint.c-witness.graphml [2021-01-07 05:09:28,421 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:09:28,422 INFO L168 Benchmark]: Toolchain (without parser) took 28483.36 ms. Allocated memory was 160.4 MB in the beginning and 299.9 MB in the end (delta: 139.5 MB). Free memory was 136.3 MB in the beginning and 196.4 MB in the end (delta: -60.1 MB). Peak memory consumption was 80.4 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,423 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 160.4 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:09:28,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.88 ms. Allocated memory is still 160.4 MB. Free memory was 136.0 MB in the beginning and 125.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.78 ms. Allocated memory is still 160.4 MB. Free memory was 125.7 MB in the beginning and 123.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,426 INFO L168 Benchmark]: Boogie Preprocessor took 33.37 ms. Allocated memory is still 160.4 MB. Free memory was 123.9 MB in the beginning and 122.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,426 INFO L168 Benchmark]: RCFGBuilder took 565.46 ms. Allocated memory is still 160.4 MB. Free memory was 122.6 MB in the beginning and 136.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,427 INFO L168 Benchmark]: TraceAbstraction took 27440.26 ms. Allocated memory was 160.4 MB in the beginning and 299.9 MB in the end (delta: 139.5 MB). Free memory was 136.1 MB in the beginning and 199.8 MB in the end (delta: -63.7 MB). Peak memory consumption was 76.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,427 INFO L168 Benchmark]: Witness Printer took 99.36 ms. Allocated memory is still 299.9 MB. Free memory was 199.8 MB in the beginning and 196.4 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:28,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 160.4 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.88 ms. Allocated memory is still 160.4 MB. Free memory was 136.0 MB in the beginning and 125.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.78 ms. Allocated memory is still 160.4 MB. Free memory was 125.7 MB in the beginning and 123.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.37 ms. Allocated memory is still 160.4 MB. Free memory was 123.9 MB in the beginning and 122.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.46 ms. Allocated memory is still 160.4 MB. Free memory was 122.6 MB in the beginning and 136.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 27440.26 ms. Allocated memory was 160.4 MB in the beginning and 299.9 MB in the end (delta: 139.5 MB). Free memory was 136.1 MB in the beginning and 199.8 MB in the end (delta: -63.7 MB). Peak memory consumption was 76.1 MB. Max. memory is 8.0 GB. * Witness Printer took 99.36 ms. Allocated memory is still 299.9 MB. Free memory was 199.8 MB in the beginning and 196.4 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.3s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 801 SDtfs, 2388 SDslu, 3236 SDs, 0 SdLazy, 3767 SolverSat, 483 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 228 SyntacticMatches, 5 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 328 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 691 NumberOfCodeBlocks, 691 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 662 ConstructedInterpolants, 40 QuantifiedInterpolants, 155598 SizeOfPredicates, 91 NumberOfNonLiveVariables, 1659 ConjunctsInSsa, 236 ConjunctsInUnsatCore, 29 InterpolantComputations, 12 PerfectInterpolantSequences, 13/100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...