/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-bitabs-178dd20 [2021-01-07 05:08:49,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:08:49,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:08:49,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:08:49,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:08:49,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:08:49,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:08:49,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:08:49,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:08:49,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:08:49,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:08:49,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:08:49,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:08:49,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:08:49,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:08:49,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:08:49,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:08:49,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:08:49,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:08:49,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:08:49,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:08:49,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:08:49,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:08:49,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:08:49,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:08:49,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:08:49,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:08:49,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:08:49,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:08:49,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:08:49,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:08:49,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:08:49,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:08:49,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:08:49,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:08:49,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:08:49,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:08:49,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:08:49,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:08:49,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:08:49,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:08:49,785 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:08:49,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:08:49,785 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:08:49,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:08:49,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:08:49,787 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:08:49,788 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:08:49,788 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:08:49,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:08:49,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:08:49,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:08:49,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:08:49,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:08:49,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:08:49,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:08:49,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:08:49,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:08:49,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:08:49,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:08:49,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:08:49,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:08:50,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:08:50,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:08:50,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:08:50,281 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:08:50,282 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:08:50,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-01-07 05:08:50,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d237e53ee/aadd698208b246a0b02022d5db7c7d90/FLAG3639055e2 [2021-01-07 05:08:51,093 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:08:51,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-01-07 05:08:51,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d237e53ee/aadd698208b246a0b02022d5db7c7d90/FLAG3639055e2 [2021-01-07 05:08:51,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d237e53ee/aadd698208b246a0b02022d5db7c7d90 [2021-01-07 05:08:51,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:08:51,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:08:51,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:08:51,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:08:51,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:08:51,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65342844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51, skipping insertion in model container [2021-01-07 05:08:51,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:08:51,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-07 05:08:51,660 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-01-07 05:08:51,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:08:51,700 INFO L203 MainTranslator]: Completed pre-run [2021-01-07 05:08:51,715 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-01-07 05:08:51,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:08:51,745 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:08:51,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51 WrapperNode [2021-01-07 05:08:51,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:08:51,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:08:51,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:08:51,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:08:51,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:08:51,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:08:51,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:08:51,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:08:51,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... [2021-01-07 05:08:51,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:08:51,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:08:51,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:08:51,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:08:51,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:08:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-07 05:08:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-01-07 05:08:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-01-07 05:08:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:08:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:08:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:08:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:08:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:08:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:08:52,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:08:52,423 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-07 05:08:52,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:08:52 BoogieIcfgContainer [2021-01-07 05:08:52,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:08:52,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:08:52,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:08:52,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:08:52,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:08:51" (1/3) ... [2021-01-07 05:08:52,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efea817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:08:52, skipping insertion in model container [2021-01-07 05:08:52,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:08:51" (2/3) ... [2021-01-07 05:08:52,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efea817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:08:52, skipping insertion in model container [2021-01-07 05:08:52,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:08:52" (3/3) ... [2021-01-07 05:08:52,436 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-01-07 05:08:52,444 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:08:52,451 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2021-01-07 05:08:52,473 INFO L253 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-01-07 05:08:52,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:08:52,499 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:08:52,499 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:08:52,499 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:08:52,499 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:08:52,499 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:08:52,500 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:08:52,500 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:08:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2021-01-07 05:08:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-07 05:08:52,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:52,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:52,531 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]=== [2021-01-07 05:08:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1209326227, now seen corresponding path program 1 times [2021-01-07 05:08:52,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:52,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402439294] [2021-01-07 05:08:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402439294] [2021-01-07 05:08:52,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:52,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:08:52,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297188665] [2021-01-07 05:08:52,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-07 05:08:52,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-07 05:08:52,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-07 05:08:52,839 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2021-01-07 05:08:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:52,872 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-01-07 05:08:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-07 05:08:52,874 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-07 05:08:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:52,901 INFO L225 Difference]: With dead ends: 47 [2021-01-07 05:08:52,902 INFO L226 Difference]: Without dead ends: 45 [2021-01-07 05:08:52,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-07 05:08:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-07 05:08:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-07 05:08:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-07 05:08:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-07 05:08:52,969 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 10 [2021-01-07 05:08:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:52,970 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-07 05:08:52,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-07 05:08:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-07 05:08:52,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-07 05:08:52,973 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:52,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:52,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:08:52,976 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]=== [2021-01-07 05:08:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2018672853, now seen corresponding path program 1 times [2021-01-07 05:08:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:52,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012510999] [2021-01-07 05:08:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012510999] [2021-01-07 05:08:53,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:53,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:08:53,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438588660] [2021-01-07 05:08:53,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:08:53,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:08:53,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:08:53,174 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 5 states. [2021-01-07 05:08:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:53,351 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-01-07 05:08:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:08:53,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-07 05:08:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:53,355 INFO L225 Difference]: With dead ends: 94 [2021-01-07 05:08:53,356 INFO L226 Difference]: Without dead ends: 94 [2021-01-07 05:08:53,357 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 [2021-01-07 05:08:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-07 05:08:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2021-01-07 05:08:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-07 05:08:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-01-07 05:08:53,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 10 [2021-01-07 05:08:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:53,374 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-01-07 05:08:53,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:08:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-01-07 05:08:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:08:53,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:53,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:53,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:08:53,376 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]=== [2021-01-07 05:08:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1845655035, now seen corresponding path program 1 times [2021-01-07 05:08:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:53,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098892104] [2021-01-07 05:08:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:53,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098892104] [2021-01-07 05:08:53,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:53,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:08:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24775515] [2021-01-07 05:08:53,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:08:53,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:08:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:08:53,451 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 6 states. [2021-01-07 05:08:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:53,562 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-01-07 05:08:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:08:53,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-07 05:08:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:53,564 INFO L225 Difference]: With dead ends: 59 [2021-01-07 05:08:53,564 INFO L226 Difference]: Without dead ends: 59 [2021-01-07 05:08:53,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:08:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-07 05:08:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-07 05:08:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-07 05:08:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-01-07 05:08:53,574 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-01-07 05:08:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:53,574 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-01-07 05:08:53,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:08:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-01-07 05:08:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:08:53,575 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:53,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:53,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:08:53,576 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]=== [2021-01-07 05:08:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1845655036, now seen corresponding path program 1 times [2021-01-07 05:08:53,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:53,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615940675] [2021-01-07 05:08:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:53,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615940675] [2021-01-07 05:08:53,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:53,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-07 05:08:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767368174] [2021-01-07 05:08:53,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:08:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:08:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:08:53,757 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 7 states. [2021-01-07 05:08:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:54,007 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-01-07 05:08:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:08:54,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-07 05:08:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:54,030 INFO L225 Difference]: With dead ends: 79 [2021-01-07 05:08:54,030 INFO L226 Difference]: Without dead ends: 79 [2021-01-07 05:08:54,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:08:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-07 05:08:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2021-01-07 05:08:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-07 05:08:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-01-07 05:08:54,061 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2021-01-07 05:08:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:54,061 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-01-07 05:08:54,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:08:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-01-07 05:08:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:08:54,062 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:54,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:54,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:08:54,064 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]=== [2021-01-07 05:08:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1380731249, now seen corresponding path program 1 times [2021-01-07 05:08:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:54,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338463181] [2021-01-07 05:08:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:54,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338463181] [2021-01-07 05:08:54,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:54,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-07 05:08:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71338090] [2021-01-07 05:08:54,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:08:54,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:08:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:08:54,269 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2021-01-07 05:08:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:54,498 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-01-07 05:08:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:08:54,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-07 05:08:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:54,500 INFO L225 Difference]: With dead ends: 76 [2021-01-07 05:08:54,500 INFO L226 Difference]: Without dead ends: 76 [2021-01-07 05:08:54,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:08:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-07 05:08:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2021-01-07 05:08:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-07 05:08:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-01-07 05:08:54,507 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 12 [2021-01-07 05:08:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:54,508 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-01-07 05:08:54,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:08:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-01-07 05:08:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-07 05:08:54,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:54,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:54,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:08:54,509 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]=== [2021-01-07 05:08:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -137525789, now seen corresponding path program 1 times [2021-01-07 05:08:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:54,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411548818] [2021-01-07 05:08:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-07 05:08:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411548818] [2021-01-07 05:08:54,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:54,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:08:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460311125] [2021-01-07 05:08:54,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:08:54,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:08:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:08:54,557 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 4 states. [2021-01-07 05:08:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:54,581 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-01-07 05:08:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:08:54,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-07 05:08:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:54,582 INFO L225 Difference]: With dead ends: 57 [2021-01-07 05:08:54,582 INFO L226 Difference]: Without dead ends: 57 [2021-01-07 05:08:54,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:08:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-07 05:08:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-07 05:08:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-07 05:08:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-01-07 05:08:54,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 13 [2021-01-07 05:08:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:54,589 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-01-07 05:08:54,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:08:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-01-07 05:08:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:08:54,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:54,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:54,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:08:54,590 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]=== [2021-01-07 05:08:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash 981704518, now seen corresponding path program 1 times [2021-01-07 05:08:54,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:54,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585781568] [2021-01-07 05:08:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-07 05:08:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:54,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585781568] [2021-01-07 05:08:54,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:08:54,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:08:54,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912711547] [2021-01-07 05:08:54,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:08:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:08:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:08:54,672 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2021-01-07 05:08:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:54,716 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-01-07 05:08:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:08:54,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-07 05:08:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:54,718 INFO L225 Difference]: With dead ends: 56 [2021-01-07 05:08:54,718 INFO L226 Difference]: Without dead ends: 51 [2021-01-07 05:08:54,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:08:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-07 05:08:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-07 05:08:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-07 05:08:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-01-07 05:08:54,724 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 15 [2021-01-07 05:08:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:54,724 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-01-07 05:08:54,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:08:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-01-07 05:08:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-07 05:08:54,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:54,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:54,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:08:54,726 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]=== [2021-01-07 05:08:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1390061044, now seen corresponding path program 1 times [2021-01-07 05:08:54,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:54,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337597847] [2021-01-07 05:08:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:54,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337597847] [2021-01-07 05:08:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782790690] [2021-01-07 05:08:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-07 05:08:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:08:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:55,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:08:55,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-07 05:08:55,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846177160] [2021-01-07 05:08:55,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-07 05:08:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:55,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-07 05:08:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:08:55,155 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 10 states. [2021-01-07 05:08:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:55,402 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-01-07 05:08:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-07 05:08:55,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-07 05:08:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:55,406 INFO L225 Difference]: With dead ends: 71 [2021-01-07 05:08:55,406 INFO L226 Difference]: Without dead ends: 71 [2021-01-07 05:08:55,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-07 05:08:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-07 05:08:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-01-07 05:08:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-07 05:08:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-07 05:08:55,417 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 18 [2021-01-07 05:08:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:55,417 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-07 05:08:55,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-07 05:08:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-07 05:08:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-07 05:08:55,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:55,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:55,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-07 05:08:55,627 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]=== [2021-01-07 05:08:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash 142223443, now seen corresponding path program 1 times [2021-01-07 05:08:55,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:55,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285432168] [2021-01-07 05:08:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285432168] [2021-01-07 05:08:55,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197355396] [2021-01-07 05:08:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-07 05:08:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:08:55,878 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-01-07 05:08:55,880 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:08:55,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:08:55,886 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:08:55,887 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-01-07 05:08:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:56,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:08:56,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-07 05:08:56,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40536675] [2021-01-07 05:08:56,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-07 05:08:56,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-07 05:08:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:08:56,110 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2021-01-07 05:08:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:56,678 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-01-07 05:08:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:08:56,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2021-01-07 05:08:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:56,681 INFO L225 Difference]: With dead ends: 81 [2021-01-07 05:08:56,682 INFO L226 Difference]: Without dead ends: 81 [2021-01-07 05:08:56,684 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 [2021-01-07 05:08:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-07 05:08:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2021-01-07 05:08:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-07 05:08:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-07 05:08:56,696 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 19 [2021-01-07 05:08:56,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:56,697 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-07 05:08:56,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-07 05:08:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-07 05:08:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-07 05:08:56,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:56,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:08:56,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:56,922 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]=== [2021-01-07 05:08:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:56,923 INFO L82 PathProgramCache]: Analyzing trace with hash 113959418, now seen corresponding path program 1 times [2021-01-07 05:08:56,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:56,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395335118] [2021-01-07 05:08:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395335118] [2021-01-07 05:08:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088851802] [2021-01-07 05:08:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:57,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-07 05:08:57,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:08:57,165 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-01-07 05:08:57,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:08:57,170 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:08:57,171 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:08:57,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-01-07 05:08:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:57,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:08:57,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-07 05:08:57,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867277339] [2021-01-07 05:08:57,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-07 05:08:57,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:57,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-07 05:08:57,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-01-07 05:08:57,351 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 14 states. [2021-01-07 05:08:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:57,888 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-01-07 05:08:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:08:57,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2021-01-07 05:08:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:57,890 INFO L225 Difference]: With dead ends: 80 [2021-01-07 05:08:57,890 INFO L226 Difference]: Without dead ends: 80 [2021-01-07 05:08:57,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-01-07 05:08:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-07 05:08:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 28. [2021-01-07 05:08:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:08:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-07 05:08:57,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2021-01-07 05:08:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:57,895 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-07 05:08:57,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-07 05:08:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-07 05:08:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-07 05:08:57,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:57,896 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] [2021-01-07 05:08:58,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-07 05:08:58,098 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]=== [2021-01-07 05:08:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash -72591101, now seen corresponding path program 1 times [2021-01-07 05:08:58,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:58,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334851498] [2021-01-07 05:08:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:58,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-01-07 05:08:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334851498] [2021-01-07 05:08:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245632535] [2021-01-07 05:08:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:08:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:08:58,257 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-07 05:08:58,258 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:08:58,260 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:08:58,261 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:08:58,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2021-01-07 05:08:58,321 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-01-07 05:08:58,322 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:08:58,326 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:08:58,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-07 05:08:58,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2021-01-07 05:08:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:58,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:08:58,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-01-07 05:08:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045715830] [2021-01-07 05:08:58,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:08:58,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:08:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-07 05:08:58,367 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-07 05:08:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:58,472 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-07 05:08:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:08:58,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-07 05:08:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:58,474 INFO L225 Difference]: With dead ends: 28 [2021-01-07 05:08:58,474 INFO L226 Difference]: Without dead ends: 28 [2021-01-07 05:08:58,474 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 [2021-01-07 05:08:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-07 05:08:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-07 05:08:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:08:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-07 05:08:58,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-01-07 05:08:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:58,477 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-07 05:08:58,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:08:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-07 05:08:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-07 05:08:58,478 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:58,478 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] [2021-01-07 05:08:58,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:58,694 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]=== [2021-01-07 05:08:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash -752649471, now seen corresponding path program 1 times [2021-01-07 05:08:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:58,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122193623] [2021-01-07 05:08:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:08:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:58,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-01-07 05:08:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122193623] [2021-01-07 05:08:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163174003] [2021-01-07 05:08:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:08:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:08:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-07 05:08:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:08:59,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:08:59,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:08:59,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:08:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:08:59,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:08:59,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-07 05:08:59,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338408881] [2021-01-07 05:08:59,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-07 05:08:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:08:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-07 05:08:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-01-07 05:08:59,181 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 18 states. [2021-01-07 05:08:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:08:59,745 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-01-07 05:08:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-07 05:08:59,745 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-07 05:08:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:08:59,746 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:08:59,746 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:08:59,747 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 [2021-01-07 05:08:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:08:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-01-07 05:08:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-07 05:08:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-01-07 05:08:59,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2021-01-07 05:08:59,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:08:59,751 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-01-07 05:08:59,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-07 05:08:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-01-07 05:08:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-07 05:08:59,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:08:59,752 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] [2021-01-07 05:08:59,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-07 05:08:59,962 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]=== [2021-01-07 05:08:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:08:59,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1741635870, now seen corresponding path program 1 times [2021-01-07 05:08:59,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:08:59,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228835053] [2021-01-07 05:08:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-01-07 05:09:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:00,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228835053] [2021-01-07 05:09:00,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512519808] [2021-01-07 05:09:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-07 05:09:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:00,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:00,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-01-07 05:09:00,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966916482] [2021-01-07 05:09:00,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:09:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:09:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:09:00,633 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 25 states. [2021-01-07 05:09:01,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:01,589 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-01-07 05:09:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:09:01,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 23 [2021-01-07 05:09:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:01,591 INFO L225 Difference]: With dead ends: 68 [2021-01-07 05:09:01,591 INFO L226 Difference]: Without dead ends: 68 [2021-01-07 05:09:01,592 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 [2021-01-07 05:09:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-07 05:09:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-01-07 05:09:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-07 05:09:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-07 05:09:01,604 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 23 [2021-01-07 05:09:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:01,604 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-07 05:09:01,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:09:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-07 05:09:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-07 05:09:01,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:01,607 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:01,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:01,812 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]=== [2021-01-07 05:09:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1869262430, now seen corresponding path program 1 times [2021-01-07 05:09:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:01,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880641528] [2021-01-07 05:09:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:01,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-01-07 05:09:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:01,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880641528] [2021-01-07 05:09:01,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557317268] [2021-01-07 05:09:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-07 05:09:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:02,025 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-07 05:09:02,026 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:02,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:02,028 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:09:02,028 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2021-01-07 05:09:08,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-01-07 05:09:08,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:09:08,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:09:08,225 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-07 05:09:08,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2021-01-07 05:09:08,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:09:08,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-07 05:09:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:08,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:08,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-01-07 05:09:08,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974703364] [2021-01-07 05:09:08,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-07 05:09:08,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-07 05:09:08,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=281, Unknown=3, NotChecked=0, Total=342 [2021-01-07 05:09:08,302 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2021-01-07 05:09:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:10,663 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-01-07 05:09:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:09:10,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2021-01-07 05:09:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:10,665 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:09:10,665 INFO L226 Difference]: Without dead ends: 45 [2021-01-07 05:09:10,666 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 [2021-01-07 05:09:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-07 05:09:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-07 05:09:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-07 05:09:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-07 05:09:10,669 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 26 [2021-01-07 05:09:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:10,669 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-07 05:09:10,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-07 05:09:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-07 05:09:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-07 05:09:10,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:10,671 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] [2021-01-07 05:09:10,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-07 05:09:10,873 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]=== [2021-01-07 05:09:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash -171961976, now seen corresponding path program 1 times [2021-01-07 05:09:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:10,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665275586] [2021-01-07 05:09:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-01-07 05:09:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-07 05:09:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-07 05:09:11,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665275586] [2021-01-07 05:09:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754944677] [2021-01-07 05:09:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:09:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:11,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-07 05:09:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:09:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:09:11,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:09:11,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-01-07 05:09:11,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253384624] [2021-01-07 05:09:11,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-07 05:09:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-07 05:09:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-01-07 05:09:11,792 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 30 states. [2021-01-07 05:09:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:13,204 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-07 05:09:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-07 05:09:13,205 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2021-01-07 05:09:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:13,206 INFO L225 Difference]: With dead ends: 49 [2021-01-07 05:09:13,206 INFO L226 Difference]: Without dead ends: 0 [2021-01-07 05:09:13,209 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 [2021-01-07 05:09:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-07 05:09:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-07 05:09:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-07 05:09:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-07 05:09:13,210 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-01-07 05:09:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:13,210 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-07 05:09:13,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-07 05:09:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-07 05:09:13,210 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-07 05:09:13,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-07 05:09:13,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:09:13 BoogieIcfgContainer [2021-01-07 05:09:13,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:09:13,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:09:13,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:09:13,424 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:09:13,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:08:52" (3/4) ... [2021-01-07 05:09:13,430 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-07 05:09:13,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-01-07 05:09:13,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-01-07 05:09:13,446 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-01-07 05:09:13,446 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-07 05:09:13,447 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-07 05:09:13,502 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec.c-witness.graphml [2021-01-07 05:09:13,502 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:09:13,503 INFO L168 Benchmark]: Toolchain (without parser) took 22035.86 ms. Allocated memory was 151.0 MB in the beginning and 268.4 MB in the end (delta: 117.4 MB). Free memory was 125.5 MB in the beginning and 240.8 MB in the end (delta: -115.3 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:13,504 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 123.9 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:09:13,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.80 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:13,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:13,505 INFO L168 Benchmark]: Boogie Preprocessor took 29.46 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 112.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:13,506 INFO L168 Benchmark]: RCFGBuilder took 597.48 ms. Allocated memory is still 151.0 MB. Free memory was 112.0 MB in the beginning and 92.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:13,506 INFO L168 Benchmark]: TraceAbstraction took 20995.21 ms. Allocated memory was 151.0 MB in the beginning and 268.4 MB in the end (delta: 117.4 MB). Free memory was 91.8 MB in the beginning and 243.9 MB in the end (delta: -152.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:09:13,507 INFO L168 Benchmark]: Witness Printer took 78.86 ms. Allocated memory is still 268.4 MB. Free memory was 243.9 MB in the beginning and 240.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:13,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 123.9 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.80 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.46 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 112.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 597.48 ms. Allocated memory is still 151.0 MB. Free memory was 112.0 MB in the beginning and 92.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20995.21 ms. Allocated memory was 151.0 MB in the beginning and 268.4 MB in the end (delta: 117.4 MB). Free memory was 91.8 MB in the beginning and 243.9 MB in the end (delta: -152.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 78.86 ms. Allocated memory is still 268.4 MB. Free memory was 243.9 MB in the beginning and 240.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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: 20.9s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 7.7s, 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, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 408 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 11.2s 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, 0.6s SatisfiabilityAnalysisTime, 9.9s 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...