/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.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:04:58,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:04:58,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:04:58,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:04:58,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:04:58,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:04:58,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:04:58,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:04:58,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:04:58,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:04:58,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:04:58,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:04:58,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:04:58,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:04:58,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:04:58,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:04:59,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:04:59,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:04:59,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:04:59,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:04:59,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:04:59,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:04:59,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:04:59,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:04:59,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:04:59,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:04:59,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:04:59,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:04:59,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:04:59,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:04:59,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:04:59,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:04:59,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:04:59,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:04:59,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:04:59,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:04:59,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:04:59,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:04:59,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:04:59,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:04:59,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:04:59,126 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:04:59,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:04:59,127 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:04:59,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:04:59,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:04:59,128 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:04:59,129 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:04:59,129 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:04:59,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:04:59,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:04:59,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:04:59,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:04:59,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:04:59,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:04:59,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:04:59,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:04:59,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:04:59,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:04:59,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:04:59,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:04:59,132 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:04:59,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:04:59,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:04:59,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:04:59,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:04:59,576 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:04:59,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-12-22 19:04:59,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2c7f82d/b0e58df1c5ed48dbb85a3954b8b7123f/FLAGe6964b850 [2020-12-22 19:05:00,331 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:05:00,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-12-22 19:05:00,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2c7f82d/b0e58df1c5ed48dbb85a3954b8b7123f/FLAGe6964b850 [2020-12-22 19:05:00,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2c7f82d/b0e58df1c5ed48dbb85a3954b8b7123f [2020-12-22 19:05:00,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:05:00,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:05:00,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:00,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:05:00,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:05:00,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:00,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189091f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00, skipping insertion in model container [2020-12-22 19:05:00,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:00,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:05:00,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:05:00,890 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2020-12-22 19:05:00,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:00,926 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:05:00,941 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2020-12-22 19:05:00,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:00,970 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:05:00,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00 WrapperNode [2020-12-22 19:05:00,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:00,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:00,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:05:00,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:05:00,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:00,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:01,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:05:01,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:05:01,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:05:01,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... [2020-12-22 19:05:01,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:05:01,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:05:01,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:05:01,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:05:01,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:05:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-22 19:05:01,156 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-22 19:05:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:05:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:05:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:05:01,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:05:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:05:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:05:01,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:05:01,791 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-22 19:05:01,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:01 BoogieIcfgContainer [2020-12-22 19:05:01,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:05:01,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:05:01,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:05:01,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:05:01,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:00" (1/3) ... [2020-12-22 19:05:01,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd55949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:01, skipping insertion in model container [2020-12-22 19:05:01,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:00" (2/3) ... [2020-12-22 19:05:01,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd55949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:01, skipping insertion in model container [2020-12-22 19:05:01,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:01" (3/3) ... [2020-12-22 19:05:01,811 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-12-22 19:05:01,818 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:05:01,826 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2020-12-22 19:05:01,848 INFO L253 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2020-12-22 19:05:01,888 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:05:01,888 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:05:01,888 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:05:01,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:05:01,889 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:05:01,889 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:05:01,889 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:05:01,889 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:05:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-22 19:05:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 19:05:01,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:01,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:01,922 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1209326227, now seen corresponding path program 1 times [2020-12-22 19:05:01,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:01,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646509274] [2020-12-22 19:05:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:02,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646509274] [2020-12-22 19:05:02,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:02,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:02,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481741513] [2020-12-22 19:05:02,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 19:05:02,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 19:05:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 19:05:02,145 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-22 19:05:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:02,166 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-22 19:05:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 19:05:02,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 19:05:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:02,177 INFO L225 Difference]: With dead ends: 47 [2020-12-22 19:05:02,177 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 19:05:02,179 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 [2020-12-22 19:05:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 19:05:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 19:05:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 19:05:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-22 19:05:02,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 10 [2020-12-22 19:05:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:02,222 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-22 19:05:02,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 19:05:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-22 19:05:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 19:05:02,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:02,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:02,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:05:02,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2018672853, now seen corresponding path program 1 times [2020-12-22 19:05:02,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:02,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819402125] [2020-12-22 19:05:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:02,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819402125] [2020-12-22 19:05:02,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:02,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:05:02,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608142431] [2020-12-22 19:05:02,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:02,405 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 5 states. [2020-12-22 19:05:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:02,576 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-12-22 19:05:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:05:02,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 19:05:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:02,582 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:05:02,583 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:05:02,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:05:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-12-22 19:05:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-12-22 19:05:02,620 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 10 [2020-12-22 19:05:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:02,621 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-12-22 19:05:02,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-12-22 19:05:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:05:02,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:02,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:02,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:05:02,626 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1845655035, now seen corresponding path program 1 times [2020-12-22 19:05:02,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:02,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530332212] [2020-12-22 19:05:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:02,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530332212] [2020-12-22 19:05:02,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:02,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:05:02,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825137742] [2020-12-22 19:05:02,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:05:02,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:05:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:05:02,750 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 6 states. [2020-12-22 19:05:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:02,856 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-22 19:05:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:02,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:05:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:02,858 INFO L225 Difference]: With dead ends: 59 [2020-12-22 19:05:02,858 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 19:05:02,859 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 [2020-12-22 19:05:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 19:05:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 19:05:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:05:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-22 19:05:02,868 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2020-12-22 19:05:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:02,871 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-22 19:05:02,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:05:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-22 19:05:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:05:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:02,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:02,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:05:02,873 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:02,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1845655036, now seen corresponding path program 1 times [2020-12-22 19:05:02,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16343366] [2020-12-22 19:05:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:03,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16343366] [2020-12-22 19:05:03,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:03,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:05:03,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904861747] [2020-12-22 19:05:03,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:05:03,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:05:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:03,014 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 7 states. [2020-12-22 19:05:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:03,340 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-12-22 19:05:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:05:03,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 19:05:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:03,346 INFO L225 Difference]: With dead ends: 79 [2020-12-22 19:05:03,346 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 19:05:03,348 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 [2020-12-22 19:05:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 19:05:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-12-22 19:05:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:05:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-12-22 19:05:03,376 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2020-12-22 19:05:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:03,376 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-12-22 19:05:03,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:05:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-12-22 19:05:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:05:03,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:03,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:05:03,380 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1380731249, now seen corresponding path program 1 times [2020-12-22 19:05:03,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874040121] [2020-12-22 19:05:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:03,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874040121] [2020-12-22 19:05:03,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:03,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 19:05:03,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953138134] [2020-12-22 19:05:03,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:05:03,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:05:03,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:03,602 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2020-12-22 19:05:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:03,851 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-12-22 19:05:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:03,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 19:05:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:03,853 INFO L225 Difference]: With dead ends: 76 [2020-12-22 19:05:03,853 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 19:05:03,854 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 [2020-12-22 19:05:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 19:05:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2020-12-22 19:05:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:05:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-12-22 19:05:03,861 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 12 [2020-12-22 19:05:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:03,861 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-12-22 19:05:03,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:05:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-12-22 19:05:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:05:03,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:03,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:05:03,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash -137525789, now seen corresponding path program 1 times [2020-12-22 19:05:03,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695404487] [2020-12-22 19:05:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-12-22 19:05:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695404487] [2020-12-22 19:05:03,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:03,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514614061] [2020-12-22 19:05:03,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:03,909 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 4 states. [2020-12-22 19:05:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:03,945 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-12-22 19:05:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:03,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-22 19:05:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:03,947 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:05:03,947 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:05:03,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:05:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 19:05:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:05:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-12-22 19:05:03,953 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 13 [2020-12-22 19:05:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:03,954 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-12-22 19:05:03,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-12-22 19:05:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:05:03,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:03,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:05:03,956 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash 981704518, now seen corresponding path program 1 times [2020-12-22 19:05:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749134620] [2020-12-22 19:05:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-12-22 19:05:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749134620] [2020-12-22 19:05:04,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:04,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:04,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134215283] [2020-12-22 19:05:04,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:04,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:04,065 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2020-12-22 19:05:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:04,127 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-22 19:05:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:04,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 19:05:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:04,129 INFO L225 Difference]: With dead ends: 56 [2020-12-22 19:05:04,129 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:05:04,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:05:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:05:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:05:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-12-22 19:05:04,149 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 15 [2020-12-22 19:05:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:04,150 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-12-22 19:05:04,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-12-22 19:05:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 19:05:04,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:04,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:04,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:05:04,155 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:04,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1390061044, now seen corresponding path program 1 times [2020-12-22 19:05:04,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:04,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984267218] [2020-12-22 19:05:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984267218] [2020-12-22 19:05:04,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961909092] [2020-12-22 19:05:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:05:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:04,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 19:05:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836592121] [2020-12-22 19:05:04,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:05:04,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:05:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:04,526 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 10 states. [2020-12-22 19:05:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:04,775 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-12-22 19:05:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:05:04,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 19:05:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:04,777 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:05:04,777 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 19:05:04,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 19:05:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2020-12-22 19:05:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 19:05:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-22 19:05:04,783 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 18 [2020-12-22 19:05:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:04,784 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-22 19:05:04,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:05:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-22 19:05:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 19:05:04,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:04,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:04,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 19:05:05,000 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash 142223443, now seen corresponding path program 1 times [2020-12-22 19:05:05,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:05,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488778794] [2020-12-22 19:05:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:05,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488778794] [2020-12-22 19:05:05,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936623084] [2020-12-22 19:05:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:05,331 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 [2020-12-22 19:05:05,332 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:05,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:05,337 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:05,338 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-22 19:05:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:05,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:05,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-22 19:05:05,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664968767] [2020-12-22 19:05:05,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:05:05,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:05:05,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:05,599 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-12-22 19:05:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:06,131 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-12-22 19:05:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:06,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-12-22 19:05:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:06,132 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:05:06,133 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:05:06,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:05:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:05:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2020-12-22 19:05:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:05:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-22 19:05:06,149 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 19 [2020-12-22 19:05:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:06,149 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-22 19:05:06,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:05:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-22 19:05:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:06,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:06,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:06,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:06,368 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash 113959418, now seen corresponding path program 1 times [2020-12-22 19:05:06,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:06,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337301925] [2020-12-22 19:05:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:06,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337301925] [2020-12-22 19:05:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583635838] [2020-12-22 19:05:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:06,571 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 [2020-12-22 19:05:06,572 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:06,576 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:06,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:06,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-22 19:05:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:06,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:06,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-22 19:05:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400876604] [2020-12-22 19:05:06,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:05:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:05:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:06,761 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 14 states. [2020-12-22 19:05:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,260 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-12-22 19:05:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:07,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-22 19:05:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,262 INFO L225 Difference]: With dead ends: 80 [2020-12-22 19:05:07,262 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 19:05:07,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:05:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 19:05:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 28. [2020-12-22 19:05:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:05:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 19:05:07,267 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-12-22 19:05:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,269 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 19:05:07,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:05:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 19:05:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:05:07,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,273 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] [2020-12-22 19:05:07,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:05:07,486 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,487 INFO L82 PathProgramCache]: Analyzing trace with hash -72591101, now seen corresponding path program 1 times [2020-12-22 19:05:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371183332] [2020-12-22 19:05:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 19:05:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:07,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371183332] [2020-12-22 19:05:07,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099548291] [2020-12-22 19:05:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:05:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:07,648 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 [2020-12-22 19:05:07,649 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:07,651 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:07,651 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:07,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-12-22 19:05:07,713 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 [2020-12-22 19:05:07,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:07,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:07,722 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. [2020-12-22 19:05:07,722 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-12-22 19:05:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:07,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:07,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2020-12-22 19:05:07,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728313202] [2020-12-22 19:05:07,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:05:07,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:05:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:05:07,762 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-22 19:05:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,885 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-22 19:05:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:07,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-22 19:05:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,887 INFO L225 Difference]: With dead ends: 28 [2020-12-22 19:05:07,887 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 19:05:07,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 19:05:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 19:05:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:05:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 19:05:07,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-12-22 19:05:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 19:05:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:05:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 19:05:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:05:07,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,892 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] [2020-12-22 19:05:08,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:08,106 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash -752649471, now seen corresponding path program 1 times [2020-12-22 19:05:08,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:08,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184553395] [2020-12-22 19:05:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 19:05:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184553395] [2020-12-22 19:05:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737774625] [2020-12-22 19:05:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:08,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:08,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:08,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:08,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:08,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 19:05:08,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554428617] [2020-12-22 19:05:08,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:05:08,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:08,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:05:08,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:05:08,527 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 18 states. [2020-12-22 19:05:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,125 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 19:05:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:05:09,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 19:05:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,126 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:09,126 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:05:09,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:05:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-12-22 19:05:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 19:05:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-22 19:05:09,130 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2020-12-22 19:05:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,131 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-22 19:05:09,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:05:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-22 19:05:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:05:09,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,132 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] [2020-12-22 19:05:09,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 19:05:09,333 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1741635870, now seen corresponding path program 1 times [2020-12-22 19:05:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87311653] [2020-12-22 19:05:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 19:05:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87311653] [2020-12-22 19:05:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584816682] [2020-12-22 19:05:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:05:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:09,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:09,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-22 19:05:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692895305] [2020-12-22 19:05:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:05:09,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:05:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:05:09,909 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 25 states. [2020-12-22 19:05:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:10,853 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-22 19:05:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:10,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 23 [2020-12-22 19:05:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:10,855 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:05:10,855 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 19:05:10,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:05:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 19:05:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2020-12-22 19:05:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:05:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-22 19:05:10,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 23 [2020-12-22 19:05:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:10,860 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-22 19:05:10,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:05:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-22 19:05:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:10,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:10,861 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] [2020-12-22 19:05:11,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,075 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1869262430, now seen corresponding path program 1 times [2020-12-22 19:05:11,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985767462] [2020-12-22 19:05:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 19:05:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985767462] [2020-12-22 19:05:11,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587530787] [2020-12-22 19:05:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:05:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:11,285 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 [2020-12-22 19:05:11,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:11,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:11,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:11,288 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-12-22 19:05:17,482 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 [2020-12-22 19:05:17,483 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:17,488 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:17,492 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. [2020-12-22 19:05:17,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-12-22 19:05:17,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:17,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:17,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:17,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2020-12-22 19:05:17,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500423711] [2020-12-22 19:05:17,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:05:17,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:05:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=281, Unknown=3, NotChecked=0, Total=342 [2020-12-22 19:05:17,576 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-12-22 19:05:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:19,956 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 19:05:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:19,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-12-22 19:05:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:19,957 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:19,957 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 19:05:19,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=131, Invalid=466, Unknown=3, NotChecked=0, Total=600 [2020-12-22 19:05:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 19:05:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 19:05:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 19:05:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-22 19:05:19,962 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2020-12-22 19:05:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,962 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-22 19:05:19,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:05:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-22 19:05:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 19:05:19,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,964 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 19:05:20,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:05:20,179 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash -171961976, now seen corresponding path program 1 times [2020-12-22 19:05:20,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:20,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919975780] [2020-12-22 19:05:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-12-22 19:05:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919975780] [2020-12-22 19:05:20,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301066718] [2020-12-22 19:05:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:05:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:21,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:21,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2020-12-22 19:05:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671212002] [2020-12-22 19:05:21,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:05:21,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:21,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:05:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:21,117 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 30 states. [2020-12-22 19:05:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:22,549 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:05:22,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-12-22 19:05:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:22,550 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:22,551 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 19:05:22,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:05:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 19:05:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 19:05:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 19:05:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 19:05:22,553 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-12-22 19:05:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:22,553 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 19:05:22,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:05:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 19:05:22,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 19:05:22,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:05:22,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:05:22 BoogieIcfgContainer [2020-12-22 19:05:22,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:05:22,775 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:05:22,776 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:05:22,776 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:05:22,776 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:01" (3/4) ... [2020-12-22 19:05:22,783 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 19:05:22,790 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-12-22 19:05:22,797 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-12-22 19:05:22,797 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 19:05:22,798 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 19:05:22,798 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 19:05:22,866 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec.c-witness.graphml [2020-12-22 19:05:22,866 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:05:22,870 INFO L168 Benchmark]: Toolchain (without parser) took 22203.82 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 127.8 MB in the beginning and 187.2 MB in the end (delta: -59.4 MB). Peak memory consumption was 52.6 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,871 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:05:22,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.73 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 117.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,872 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.34 ms. Allocated memory is still 152.0 MB. Free memory was 117.5 MB in the beginning and 115.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,872 INFO L168 Benchmark]: Boogie Preprocessor took 30.68 ms. Allocated memory is still 152.0 MB. Free memory was 115.8 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,872 INFO L168 Benchmark]: RCFGBuilder took 749.65 ms. Allocated memory is still 152.0 MB. Free memory was 114.6 MB in the beginning and 127.2 MB in the end (delta: -12.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,873 INFO L168 Benchmark]: TraceAbstraction took 20976.10 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 127.2 MB in the beginning and 190.5 MB in the end (delta: -63.3 MB). Peak memory consumption was 49.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,873 INFO L168 Benchmark]: Witness Printer took 90.45 ms. Allocated memory is still 263.2 MB. Free memory was 190.5 MB in the beginning and 187.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:22,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.73 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 117.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.34 ms. Allocated memory is still 152.0 MB. Free memory was 117.5 MB in the beginning and 115.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.68 ms. Allocated memory is still 152.0 MB. Free memory was 115.8 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 749.65 ms. Allocated memory is still 152.0 MB. Free memory was 114.6 MB in the beginning and 127.2 MB in the end (delta: -12.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20976.10 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 127.2 MB in the beginning and 190.5 MB in the end (delta: -63.3 MB). Peak memory consumption was 49.1 MB. Max. memory is 8.0 GB. * Witness Printer took 90.45 ms. Allocated memory is still 263.2 MB. Free memory was 190.5 MB in the beginning and 187.2 MB in the end (delta: 3.3 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: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 25]: 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: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: 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 - 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: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 47 locations, 14 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.8s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 481 SDtfs, 1567 SDslu, 1718 SDs, 0 SdLazy, 2351 SolverSat, 307 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 408 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=2, 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, 15 MinimizatonAttempts, 195 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 460 NumberOfCodeBlocks, 460 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 437 ConstructedInterpolants, 13 QuantifiedInterpolants, 87682 SizeOfPredicates, 85 NumberOfNonLiveVariables, 1308 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 11/82 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...