/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:04:59,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:04:59,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:04:59,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:04:59,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:04:59,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:04:59,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:04:59,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:04:59,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:04:59,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:04:59,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:04:59,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:04:59,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:04:59,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:04:59,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:04:59,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:04:59,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:04:59,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:04:59,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:04:59,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:04:59,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:04:59,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:04:59,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:04:59,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:04:59,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:04:59,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:04:59,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:04:59,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:04:59,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:04:59,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:04:59,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:04:59,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:04:59,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:04:59,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:04:59,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:04:59,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:04:59,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:04:59,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:04:59,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:04:59,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:04:59,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:04:59,863 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:04:59,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:04:59,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:04:59,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:04:59,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:04:59,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:04:59,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:04:59,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:04:59,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:04:59,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:04:59,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:04:59,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:04:59,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:04:59,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:04:59,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:04:59,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:04:59,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:04:59,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:04:59,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:04:59,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:04:59,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:05:00,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:05:00,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:05:00,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:05:00,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:05:00,299 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:05:00,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-12-22 19:05:00,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121e38db9/7c1190443a1142289625384c12e75b50/FLAG019bc3d51 [2020-12-22 19:05:01,092 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:05:01,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-12-22 19:05:01,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121e38db9/7c1190443a1142289625384c12e75b50/FLAG019bc3d51 [2020-12-22 19:05:01,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121e38db9/7c1190443a1142289625384c12e75b50 [2020-12-22 19:05:01,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:05:01,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:05:01,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:01,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:05:01,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:05:01,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9026d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01, skipping insertion in model container [2020-12-22 19:05:01,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:05:01,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:05:01,605 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2020-12-22 19:05:01,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:01,644 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:05:01,658 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2020-12-22 19:05:01,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:01,688 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:05:01,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01 WrapperNode [2020-12-22 19:05:01,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:01,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:01,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:05:01,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:05:01,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:01,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:05:01,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:05:01,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:05:01,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... [2020-12-22 19:05:01,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:05:01,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:05:01,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:05:01,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:05:01,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:05:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-22 19:05:01,870 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-22 19:05:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:05:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:05:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:05:01,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:05:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:05:01,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:05:02,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:05:02,471 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-22 19:05:02,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:02 BoogieIcfgContainer [2020-12-22 19:05:02,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:05:02,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:05:02,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:05:02,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:05:02,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:01" (1/3) ... [2020-12-22 19:05:02,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65543d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:02, skipping insertion in model container [2020-12-22 19:05:02,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:01" (2/3) ... [2020-12-22 19:05:02,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65543d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:02, skipping insertion in model container [2020-12-22 19:05:02,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:02" (3/3) ... [2020-12-22 19:05:02,483 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-12-22 19:05:02,491 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:05:02,497 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-22 19:05:02,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-22 19:05:02,545 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:05:02,546 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:05:02,546 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:05:02,546 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:05:02,546 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:05:02,546 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:05:02,547 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:05:02,547 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:05:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-12-22 19:05:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:05:02,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:02,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:02,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1701045346, now seen corresponding path program 1 times [2020-12-22 19:05:02,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:02,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007715100] [2020-12-22 19:05:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007715100] [2020-12-22 19:05:02,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:02,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045345890] [2020-12-22 19:05:02,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 19:05:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:02,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 19:05:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 19:05:02,829 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-12-22 19:05:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:02,861 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-22 19:05:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 19:05:02,863 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-22 19:05:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:02,874 INFO L225 Difference]: With dead ends: 61 [2020-12-22 19:05:02,874 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 19:05:02,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 19:05:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 19:05:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 19:05:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:05:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-22 19:05:02,933 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 12 [2020-12-22 19:05:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:02,934 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-22 19:05:02,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 19:05:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-22 19:05:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:05:02,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:02,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:02,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:05:02,938 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash 498671710, now seen corresponding path program 1 times [2020-12-22 19:05:02,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:02,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983871639] [2020-12-22 19:05:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:03,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983871639] [2020-12-22 19:05:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:03,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:05:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462240110] [2020-12-22 19:05:03,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:03,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:03,193 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 5 states. [2020-12-22 19:05:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:03,487 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-22 19:05:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:05:03,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 19:05:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:03,494 INFO L225 Difference]: With dead ends: 108 [2020-12-22 19:05:03,494 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 19:05:03,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 19:05:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2020-12-22 19:05:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 19:05:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-12-22 19:05:03,516 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 12 [2020-12-22 19:05:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:03,517 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-12-22 19:05:03,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-12-22 19:05:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:05:03,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:03,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:05:03,519 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1812361920, now seen corresponding path program 1 times [2020-12-22 19:05:03,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127937154] [2020-12-22 19:05:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:03,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127937154] [2020-12-22 19:05:03,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:03,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:03,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780551594] [2020-12-22 19:05:03,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:03,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:03,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:03,633 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 4 states. [2020-12-22 19:05:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:03,756 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-12-22 19:05:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:03,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 19:05:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:03,763 INFO L225 Difference]: With dead ends: 76 [2020-12-22 19:05:03,763 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 19:05:03,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 19:05:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-22 19:05:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 19:05:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-22 19:05:03,785 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 14 [2020-12-22 19:05:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:03,787 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-22 19:05:03,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-22 19:05:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:05:03,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:03,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:05:03,791 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1812361919, now seen corresponding path program 1 times [2020-12-22 19:05:03,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61015045] [2020-12-22 19:05:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61015045] [2020-12-22 19:05:04,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:04,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:05:04,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099276743] [2020-12-22 19:05:04,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:05:04,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:05:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:04,010 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 7 states. [2020-12-22 19:05:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:04,112 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-12-22 19:05:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:04,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 19:05:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:04,114 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:05:04,114 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:05:04,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:05:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 19:05:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 19:05:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-12-22 19:05:04,123 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 14 [2020-12-22 19:05:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:04,123 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-12-22 19:05:04,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:05:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-12-22 19:05:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:05:04,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:04,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:04,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:05:04,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash -359056604, now seen corresponding path program 1 times [2020-12-22 19:05:04,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:04,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16374198] [2020-12-22 19:05:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16374198] [2020-12-22 19:05:04,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:04,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:05:04,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347333062] [2020-12-22 19:05:04,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:05:04,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:05:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:05:04,188 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 6 states. [2020-12-22 19:05:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:04,287 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-22 19:05:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:04,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 19:05:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:04,288 INFO L225 Difference]: With dead ends: 70 [2020-12-22 19:05:04,289 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 19:05:04,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 19:05:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-22 19:05:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 19:05:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-12-22 19:05:04,297 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 15 [2020-12-22 19:05:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:04,298 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-12-22 19:05:04,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:05:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-12-22 19:05:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:05:04,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:04,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:04,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:05:04,300 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash -359056603, now seen corresponding path program 1 times [2020-12-22 19:05:04,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:04,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36117038] [2020-12-22 19:05:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36117038] [2020-12-22 19:05:04,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:04,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:05:04,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163252470] [2020-12-22 19:05:04,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:05:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:05:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:04,415 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 7 states. [2020-12-22 19:05:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:04,652 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2020-12-22 19:05:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:05:04,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-22 19:05:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:04,654 INFO L225 Difference]: With dead ends: 90 [2020-12-22 19:05:04,654 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 19:05:04,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 19:05:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-12-22 19:05:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 19:05:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-12-22 19:05:04,663 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 15 [2020-12-22 19:05:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:04,663 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-12-22 19:05:04,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:05:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-12-22 19:05:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:05:04,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:04,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:04,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:05:04,665 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2076916866, now seen corresponding path program 1 times [2020-12-22 19:05:04,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:04,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834625032] [2020-12-22 19:05:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834625032] [2020-12-22 19:05:04,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:04,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 19:05:04,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130849896] [2020-12-22 19:05:04,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:05:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:05:04,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:05:04,778 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2020-12-22 19:05:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:05,009 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2020-12-22 19:05:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:05:05,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 19:05:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:05,012 INFO L225 Difference]: With dead ends: 111 [2020-12-22 19:05:05,012 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 19:05:05,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 19:05:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 76. [2020-12-22 19:05:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 19:05:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-12-22 19:05:05,021 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 16 [2020-12-22 19:05:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:05,021 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-12-22 19:05:05,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:05:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-12-22 19:05:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:05:05,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:05,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:05,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:05:05,023 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:05,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1754147206, now seen corresponding path program 1 times [2020-12-22 19:05:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:05,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18856962] [2020-12-22 19:05:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:05,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18856962] [2020-12-22 19:05:05,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:05,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 19:05:05,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77309902] [2020-12-22 19:05:05,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:05:05,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:05:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:05,150 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 8 states. [2020-12-22 19:05:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:05,453 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-12-22 19:05:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:05,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 19:05:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:05,455 INFO L225 Difference]: With dead ends: 93 [2020-12-22 19:05:05,455 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 19:05:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 19:05:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-12-22 19:05:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 19:05:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-12-22 19:05:05,463 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 16 [2020-12-22 19:05:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:05,463 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-12-22 19:05:05,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:05:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-12-22 19:05:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 19:05:05,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:05,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:05,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 19:05:05,465 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 131457149, now seen corresponding path program 1 times [2020-12-22 19:05:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525402209] [2020-12-22 19:05:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:05,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525402209] [2020-12-22 19:05:05,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:05,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 19:05:05,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52391] [2020-12-22 19:05:05,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:05:05,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:05,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:05:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:05:05,606 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 9 states. [2020-12-22 19:05:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:05,790 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-22 19:05:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:05,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 19:05:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:05,791 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:05:05,792 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:05:05,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:05:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 19:05:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 19:05:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-12-22 19:05:05,797 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 19 [2020-12-22 19:05:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:05,797 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-12-22 19:05:05,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:05:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-12-22 19:05:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:05,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:05,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:05,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 19:05:05,799 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash -219791608, now seen corresponding path program 1 times [2020-12-22 19:05:05,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:05,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108547375] [2020-12-22 19:05:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:05,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108547375] [2020-12-22 19:05:05,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:05,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:05,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135780942] [2020-12-22 19:05:05,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:05,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:05,863 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 4 states. [2020-12-22 19:05:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:05,893 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-12-22 19:05:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:05,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 19:05:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:05,895 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:05,895 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:05,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-22 19:05:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 19:05:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-12-22 19:05:05,900 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 20 [2020-12-22 19:05:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:05,900 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-12-22 19:05:05,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-12-22 19:05:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 19:05:05,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:05,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:05,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 19:05:05,902 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash -207239485, now seen corresponding path program 1 times [2020-12-22 19:05:05,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:05,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911161097] [2020-12-22 19:05:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:05,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911161097] [2020-12-22 19:05:05,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495098861] [2020-12-22 19:05:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:05:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:06,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:06,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 19:05:06,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503169979] [2020-12-22 19:05:06,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:05:06,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:06,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:05:06,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:06,376 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 10 states. [2020-12-22 19:05:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:06,705 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-22 19:05:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:05:06,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 19:05:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:06,707 INFO L225 Difference]: With dead ends: 90 [2020-12-22 19:05:06,707 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 19:05:06,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 19:05:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-12-22 19:05:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 19:05:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-12-22 19:05:06,714 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 22 [2020-12-22 19:05:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:06,715 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-12-22 19:05:06,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:05:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-12-22 19:05:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 19:05:06,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:06,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:06,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 19:05:06,932 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:06,932 INFO L82 PathProgramCache]: Analyzing trace with hash -766335477, now seen corresponding path program 1 times [2020-12-22 19:05:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:06,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635523395] [2020-12-22 19:05:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:06,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635523395] [2020-12-22 19:05:06,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:06,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:06,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732286620] [2020-12-22 19:05:06,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:07,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:07,001 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 5 states. [2020-12-22 19:05:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,061 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-12-22 19:05:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:07,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-22 19:05:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,063 INFO L225 Difference]: With dead ends: 70 [2020-12-22 19:05:07,063 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 19:05:07,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 19:05:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 19:05:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 19:05:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-12-22 19:05:07,067 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2020-12-22 19:05:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,068 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-12-22 19:05:07,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-12-22 19:05:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 19:05:07,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,069 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] [2020-12-22 19:05:07,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 19:05:07,070 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1588183672, now seen corresponding path program 1 times [2020-12-22 19:05:07,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577700643] [2020-12-22 19:05:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 19:05:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577700643] [2020-12-22 19:05:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985243309] [2020-12-22 19:05:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:07,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:07,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2020-12-22 19:05:07,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065293874] [2020-12-22 19:05:07,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:05:07,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:05:07,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:07,908 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 19 states. [2020-12-22 19:05:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:08,819 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2020-12-22 19:05:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:05:08,820 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-12-22 19:05:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:08,822 INFO L225 Difference]: With dead ends: 130 [2020-12-22 19:05:08,822 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 19:05:08,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 19:05:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2020-12-22 19:05:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 19:05:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2020-12-22 19:05:08,830 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 24 [2020-12-22 19:05:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:08,830 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2020-12-22 19:05:08,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:05:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2020-12-22 19:05:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:05:08,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:08,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:09,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 19:05:09,046 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1999585632, now seen corresponding path program 1 times [2020-12-22 19:05:09,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101099609] [2020-12-22 19:05:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:09,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101099609] [2020-12-22 19:05:09,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212025726] [2020-12-22 19:05:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:09,305 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-12-22 19:05:09,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:09,312 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:09,313 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:09,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-22 19:05:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:09,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:09,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-12-22 19:05:09,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366516436] [2020-12-22 19:05:09,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:09,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:09,631 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand 17 states. [2020-12-22 19:05:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:10,293 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2020-12-22 19:05:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:10,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-12-22 19:05:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:10,297 INFO L225 Difference]: With dead ends: 146 [2020-12-22 19:05:10,297 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 19:05:10,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 19:05:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 97. [2020-12-22 19:05:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 19:05:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-12-22 19:05:10,315 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 25 [2020-12-22 19:05:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:10,315 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-12-22 19:05:10,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-12-22 19:05:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:10,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:10,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:10,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:05:10,537 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1531117911, now seen corresponding path program 1 times [2020-12-22 19:05:10,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:10,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008353940] [2020-12-22 19:05:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 19:05:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:10,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008353940] [2020-12-22 19:05:10,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139413625] [2020-12-22 19:05:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:05:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:11,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2020-12-22 19:05:11,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678258053] [2020-12-22 19:05:11,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:05:11,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:05:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:05:11,243 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 25 states. [2020-12-22 19:05:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:13,306 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2020-12-22 19:05:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:05:13,307 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2020-12-22 19:05:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:13,309 INFO L225 Difference]: With dead ends: 194 [2020-12-22 19:05:13,309 INFO L226 Difference]: Without dead ends: 194 [2020-12-22 19:05:13,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:05:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-22 19:05:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 118. [2020-12-22 19:05:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 19:05:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-12-22 19:05:13,321 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 26 [2020-12-22 19:05:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:13,321 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-12-22 19:05:13,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:05:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-12-22 19:05:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:13,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:13,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:13,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,538 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:13,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1857612437, now seen corresponding path program 1 times [2020-12-22 19:05:13,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949831411] [2020-12-22 19:05:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:13,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949831411] [2020-12-22 19:05:13,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292708433] [2020-12-22 19:05:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:13,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:13,759 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-12-22 19:05:13,760 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:13,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:13,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:13,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-22 19:05:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:14,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:14,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-12-22 19:05:14,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962603032] [2020-12-22 19:05:14,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:14,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:14,093 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 17 states. [2020-12-22 19:05:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:14,854 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2020-12-22 19:05:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:14,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-12-22 19:05:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:14,857 INFO L225 Difference]: With dead ends: 165 [2020-12-22 19:05:14,857 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 19:05:14,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 19:05:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2020-12-22 19:05:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 19:05:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-12-22 19:05:14,867 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 26 [2020-12-22 19:05:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:14,867 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-12-22 19:05:14,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-12-22 19:05:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:14,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:14,869 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:15,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:05:15,083 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1924144921, now seen corresponding path program 1 times [2020-12-22 19:05:15,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919177481] [2020-12-22 19:05:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 19:05:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:15,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919177481] [2020-12-22 19:05:15,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162753543] [2020-12-22 19:05:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:05:15,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:15,284 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-12-22 19:05:15,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:15,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:15,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:15,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-12-22 19:05:15,353 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-12-22 19:05:15,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:15,362 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:15,365 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:15,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-12-22 19:05:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:15,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:15,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2020-12-22 19:05:15,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721562220] [2020-12-22 19:05:15,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:05:15,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:05:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:05:15,404 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 8 states. [2020-12-22 19:05:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:15,546 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-12-22 19:05:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:15,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 19:05:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:15,547 INFO L225 Difference]: With dead ends: 64 [2020-12-22 19:05:15,547 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 19:05:15,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 19:05:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 19:05:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-22 19:05:15,551 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 26 [2020-12-22 19:05:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:15,552 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-22 19:05:15,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:05:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-22 19:05:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:05:15,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,553 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:15,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:05:15,765 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,766 INFO L82 PathProgramCache]: Analyzing trace with hash -980974189, now seen corresponding path program 1 times [2020-12-22 19:05:15,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945056539] [2020-12-22 19:05:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 19:05:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:15,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945056539] [2020-12-22 19:05:15,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540382210] [2020-12-22 19:05:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:05:16,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:16,085 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-12-22 19:05:16,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:16,091 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:16,092 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:16,092 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2020-12-22 19:05:22,381 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-12-22 19:05:22,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,388 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:22,391 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-12-22 19:05:22,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:22,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:05:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:22,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:22,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2020-12-22 19:05:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221058204] [2020-12-22 19:05:22,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:05:22,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:05:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=394, Unknown=3, NotChecked=0, Total=462 [2020-12-22 19:05:22,468 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 22 states. [2020-12-22 19:05:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:25,005 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-22 19:05:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:05:25,006 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-12-22 19:05:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:25,007 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:05:25,007 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 19:05:25,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=152, Invalid=715, Unknown=3, NotChecked=0, Total=870 [2020-12-22 19:05:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 19:05:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 19:05:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:05:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-12-22 19:05:25,012 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 29 [2020-12-22 19:05:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:25,013 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-12-22 19:05:25,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:05:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-12-22 19:05:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 19:05:25,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:25,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:25,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:05:25,230 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969094, now seen corresponding path program 1 times [2020-12-22 19:05:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:25,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751173725] [2020-12-22 19:05:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 19:05:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-22 19:05:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751173725] [2020-12-22 19:05:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162745464] [2020-12-22 19:05:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:05:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:25,640 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2020-12-22 19:05:25,640 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:25,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:25,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:25,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2020-12-22 19:05:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:27,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:27,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2020-12-22 19:05:27,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616346534] [2020-12-22 19:05:27,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:05:27,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:05:27,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=532, Unknown=1, NotChecked=0, Total=600 [2020-12-22 19:05:27,575 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 25 states. [2020-12-22 19:05:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:30,216 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-12-22 19:05:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:05:30,217 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2020-12-22 19:05:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:30,218 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:05:30,219 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 19:05:30,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=188, Invalid=1217, Unknown=1, NotChecked=0, Total=1406 [2020-12-22 19:05:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 19:05:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-22 19:05:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:05:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 19:05:30,223 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 35 [2020-12-22 19:05:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:30,223 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 19:05:30,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:05:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 19:05:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:05:30,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:30,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:30,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,429 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION, checkErr2REQUIRES_VIOLATION, checkErr0ASSERT_VIOLATIONMEMORY_LEAK, checkErr8REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr9ASSERT_VIOLATIONMEMORY_LEAK, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2020-12-22 19:05:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1205791223, now seen corresponding path program 1 times [2020-12-22 19:05:30,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:30,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975596880] [2020-12-22 19:05:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 19:05:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-22 19:05:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975596880] [2020-12-22 19:05:30,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967860500] [2020-12-22 19:05:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:05:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:31,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:31,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2020-12-22 19:05:31,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157276408] [2020-12-22 19:05:31,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:05:31,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:05:31,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:31,516 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 30 states. [2020-12-22 19:05:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:33,337 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 19:05:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:05:33,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 45 [2020-12-22 19:05:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:33,338 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:33,338 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 19:05:33,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:05:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 19:05:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 19:05:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 19:05:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 19:05:33,340 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-12-22 19:05:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:33,340 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 19:05:33,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:05:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 19:05:33,341 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 19:05:33,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:33,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:05:33 BoogieIcfgContainer [2020-12-22 19:05:33,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:05:33,550 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:05:33,550 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:05:33,550 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:05:33,551 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:02" (3/4) ... [2020-12-22 19:05:33,556 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 19:05:33,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-12-22 19:05:33,573 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-22 19:05:33,573 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 19:05:33,574 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 19:05:33,574 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 19:05:33,663 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec_onepoint.c-witness.graphml [2020-12-22 19:05:33,663 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:05:33,665 INFO L168 Benchmark]: Toolchain (without parser) took 32243.97 ms. Allocated memory was 157.3 MB in the beginning and 278.9 MB in the end (delta: 121.6 MB). Free memory was 132.4 MB in the beginning and 201.8 MB in the end (delta: -69.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,666 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 157.3 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:05:33,666 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.22 ms. Allocated memory is still 157.3 MB. Free memory was 132.0 MB in the beginning and 122.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,666 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.79 ms. Allocated memory is still 157.3 MB. Free memory was 121.8 MB in the beginning and 120.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,667 INFO L168 Benchmark]: Boogie Preprocessor took 33.69 ms. Allocated memory is still 157.3 MB. Free memory was 120.0 MB in the beginning and 118.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,667 INFO L168 Benchmark]: RCFGBuilder took 699.59 ms. Allocated memory is still 157.3 MB. Free memory was 118.8 MB in the beginning and 133.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,668 INFO L168 Benchmark]: TraceAbstraction took 31074.23 ms. Allocated memory was 157.3 MB in the beginning and 278.9 MB in the end (delta: 121.6 MB). Free memory was 132.8 MB in the beginning and 204.9 MB in the end (delta: -72.1 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,668 INFO L168 Benchmark]: Witness Printer took 113.46 ms. Allocated memory is still 278.9 MB. Free memory was 204.9 MB in the beginning and 201.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:05:33,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 157.3 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.22 ms. Allocated memory is still 157.3 MB. Free memory was 132.0 MB in the beginning and 122.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 47.79 ms. Allocated memory is still 157.3 MB. Free memory was 121.8 MB in the beginning and 120.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.69 ms. Allocated memory is still 157.3 MB. Free memory was 120.0 MB in the beginning and 118.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 699.59 ms. Allocated memory is still 157.3 MB. Free memory was 118.8 MB in the beginning and 133.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31074.23 ms. Allocated memory was 157.3 MB in the beginning and 278.9 MB in the end (delta: 121.6 MB). Free memory was 132.8 MB in the beginning and 204.9 MB in the end (delta: -72.1 MB). Peak memory consumption was 51.1 MB. Max. memory is 8.0 GB. * Witness Printer took 113.46 ms. Allocated memory is still 278.9 MB. Free memory was 204.9 MB in the beginning and 201.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.0s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 801 SDtfs, 2388 SDslu, 3236 SDs, 0 SdLazy, 3767 SolverSat, 483 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 228 SyntacticMatches, 5 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 16.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 328 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 691 NumberOfCodeBlocks, 691 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 662 ConstructedInterpolants, 40 QuantifiedInterpolants, 155598 SizeOfPredicates, 91 NumberOfNonLiveVariables, 1659 ConjunctsInSsa, 236 ConjunctsInUnsatCore, 29 InterpolantComputations, 12 PerfectInterpolantSequences, 13/100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...