/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/memsafety/20051113-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:05:03,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:05:03,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:05:03,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:05:03,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:05:03,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:05:03,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:05:03,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:05:03,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:05:03,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:05:03,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:05:03,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:05:03,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:05:03,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:05:03,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:05:03,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:05:03,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:05:03,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:05:03,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:05:03,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:05:03,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:05:03,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:05:03,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:05:03,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:05:03,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 19:05:03,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 19:05:03,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 19:05:03,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 19:05:03,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 19:05:03,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 19:05:03,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:05:03,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:05:03,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:05:03,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:05:03,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:05:03,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:05:03,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:05:03,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:05:03,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:05:03,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:05:03,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:05:03,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:05:03,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:05:03,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:05:03,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:05:03,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:05:03,601 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:05:03,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:05:03,601 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:05:03,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:05:03,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:05:03,602 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:05:03,602 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:05:03,603 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:05:03,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:05:03,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:05:03,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:05:03,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:05:03,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:05:03,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:05:03,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:03,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:05:03,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:05:03,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:05:03,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:05:03,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:05:03,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:05:03,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:05:04,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:05:04,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:05:04,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:05:04,034 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:05:04,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20051113-1.i [2020-12-22 19:05:04,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f81424b8/b0c4c7c3713146cb8d1e0da5d57f2aee/FLAG724ed7dac [2020-12-22 19:05:04,945 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:05:04,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20051113-1.i [2020-12-22 19:05:04,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f81424b8/b0c4c7c3713146cb8d1e0da5d57f2aee/FLAG724ed7dac [2020-12-22 19:05:05,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f81424b8/b0c4c7c3713146cb8d1e0da5d57f2aee [2020-12-22 19:05:05,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:05:05,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:05:05,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:05,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:05:05,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:05:05,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609756a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05, skipping insertion in model container [2020-12-22 19:05:05,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:05:05,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:05:05,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:05,735 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:05:05,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:05,858 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:05:05,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05 WrapperNode [2020-12-22 19:05:05,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:05,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:05,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:05:05,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:05:05,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:05,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:05:05,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:05:05,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:05:05,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:05,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:06,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:06,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (1/1) ... [2020-12-22 19:05:06,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:05:06,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:05:06,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:05:06,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:05:06,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (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 19:05:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:05:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:05:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:05:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:05:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:05:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:05:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:05:06,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:05:06,823 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-22 19:05:06,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:06 BoogieIcfgContainer [2020-12-22 19:05:06,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:05:06,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:05:06,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:05:06,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:05:06,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:05" (1/3) ... [2020-12-22 19:05:06,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6348f1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:06, skipping insertion in model container [2020-12-22 19:05:06,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:05" (2/3) ... [2020-12-22 19:05:06,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6348f1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:06, skipping insertion in model container [2020-12-22 19:05:06,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:06" (3/3) ... [2020-12-22 19:05:06,835 INFO L111 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2020-12-22 19:05:06,841 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:05:06,847 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2020-12-22 19:05:06,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2020-12-22 19:05:06,893 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:05:06,893 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:05:06,893 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:05:06,893 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:05:06,893 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:05:06,894 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:05:06,894 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:05:06,894 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:05:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-12-22 19:05:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:06,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:06,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:06,924 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:06,934 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-12-22 19:05:06,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:06,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961573922] [2020-12-22 19:05:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,120 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 19:05:07,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961573922] [2020-12-22 19:05:07,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:07,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506777991] [2020-12-22 19:05:07,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:07,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:07,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:07,146 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2020-12-22 19:05:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,221 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-22 19:05:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:07,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,233 INFO L225 Difference]: With dead ends: 59 [2020-12-22 19:05:07,234 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:05:07,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:05:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 19:05:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:05:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-22 19:05:07,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 3 [2020-12-22 19:05:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,301 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-22 19:05:07,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-22 19:05:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:05:07,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:05:07,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:05:07,303 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-12-22 19:05:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799604010] [2020-12-22 19:05:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,391 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 19:05:07,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799604010] [2020-12-22 19:05:07,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:07,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:07,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212960052] [2020-12-22 19:05:07,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:07,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:07,402 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 3 states. [2020-12-22 19:05:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,494 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-12-22 19:05:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:07,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:05:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,497 INFO L225 Difference]: With dead ends: 56 [2020-12-22 19:05:07,497 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 19:05:07,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 19:05:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 19:05:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 19:05:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-22 19:05:07,506 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 4 [2020-12-22 19:05:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,507 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-22 19:05:07,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-22 19:05:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:05:07,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:07,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:05:07,508 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2020-12-22 19:05:07,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993301857] [2020-12-22 19:05:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,558 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 19:05:07,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993301857] [2020-12-22 19:05:07,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:07,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:07,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789358198] [2020-12-22 19:05:07,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:07,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:07,561 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-12-22 19:05:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,581 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-22 19:05:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:07,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:05:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,583 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:05:07,583 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:05:07,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:05:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 19:05:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:05:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-22 19:05:07,592 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 7 [2020-12-22 19:05:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,593 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-22 19:05:07,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-22 19:05:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:05:07,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:07,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:05:07,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash 87920521, now seen corresponding path program 1 times [2020-12-22 19:05:07,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347723284] [2020-12-22 19:05:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:07,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347723284] [2020-12-22 19:05:07,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:07,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:07,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039748149] [2020-12-22 19:05:07,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:07,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:07,681 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 5 states. [2020-12-22 19:05:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,761 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-22 19:05:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:07,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 19:05:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,763 INFO L225 Difference]: With dead ends: 50 [2020-12-22 19:05:07,763 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 19:05:07,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 19:05:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 19:05:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:05:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 19:05:07,770 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 8 [2020-12-22 19:05:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,770 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 19:05:07,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 19:05:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:05:07,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:07,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:05:07,772 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash 87920522, now seen corresponding path program 1 times [2020-12-22 19:05:07,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94996339] [2020-12-22 19:05:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:07,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94996339] [2020-12-22 19:05:07,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647424363] [2020-12-22 19:05:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:05:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:08,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:08,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 19:05:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543973793] [2020-12-22 19:05:08,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:05:08,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:05:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:08,061 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 8 states. [2020-12-22 19:05:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:08,103 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-22 19:05:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:08,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-22 19:05:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:08,110 INFO L225 Difference]: With dead ends: 51 [2020-12-22 19:05:08,110 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:05:08,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:05:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:05:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:05:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:05:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-22 19:05:08,128 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 8 [2020-12-22 19:05:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:08,128 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-22 19:05:08,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:05:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-22 19:05:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:05:08,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:08,129 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:08,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:08,345 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:08,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492694, now seen corresponding path program 2 times [2020-12-22 19:05:08,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:08,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382629501] [2020-12-22 19:05:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,416 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 19:05:08,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382629501] [2020-12-22 19:05:08,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651561490] [2020-12-22 19:05:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:08,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:05:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:08,524 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 6 treesize of output 5 [2020-12-22 19:05:08,525 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:08,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:08,532 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:08,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:08,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:08,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2020-12-22 19:05:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974987970] [2020-12-22 19:05:08,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:08,566 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 3 states. [2020-12-22 19:05:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:08,616 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-22 19:05:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:08,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 19:05:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:08,618 INFO L225 Difference]: With dead ends: 44 [2020-12-22 19:05:08,618 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 19:05:08,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:05:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 19:05:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 19:05:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:05:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-22 19:05:08,623 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 9 [2020-12-22 19:05:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:08,623 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-22 19:05:08,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-22 19:05:08,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:05:08,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:08,625 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:08,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:08,839 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1369785802, now seen corresponding path program 1 times [2020-12-22 19:05:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:08,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053352519] [2020-12-22 19:05:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:08,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053352519] [2020-12-22 19:05:08,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:08,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856850180] [2020-12-22 19:05:08,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:08,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:08,901 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2020-12-22 19:05:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:08,960 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-22 19:05:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:08,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 19:05:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:08,961 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:05:08,961 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 19:05:08,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 19:05:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 19:05:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 19:05:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 19:05:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-22 19:05:08,975 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2020-12-22 19:05:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:08,976 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-22 19:05:08,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-22 19:05:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:05:08,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:08,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:08,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:05:08,978 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1369785801, now seen corresponding path program 1 times [2020-12-22 19:05:08,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:08,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940722646] [2020-12-22 19:05:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,112 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 19:05:09,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940722646] [2020-12-22 19:05:09,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141265663] [2020-12-22 19:05:09,120 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 19:05:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 19:05:09,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:09,330 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 19:05:09,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:09,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 19:05:09,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928831453] [2020-12-22 19:05:09,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:05:09,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:05:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:09,333 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2020-12-22 19:05:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,366 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-22 19:05:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:09,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-22 19:05:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,370 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:05:09,370 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:05:09,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:05:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 19:05:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:05:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 19:05:09,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2020-12-22 19:05:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,383 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 19:05:09,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:05:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 19:05:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 19:05:09,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,387 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:09,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:09,601 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1461234839, now seen corresponding path program 2 times [2020-12-22 19:05:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056873599] [2020-12-22 19:05:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:09,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056873599] [2020-12-22 19:05:09,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550536033] [2020-12-22 19:05:09,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:09,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:05:09,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:09,821 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 6 treesize of output 5 [2020-12-22 19:05:09,823 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:09,828 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:09,829 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:09,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:05:09,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:09,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2020-12-22 19:05:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300428500] [2020-12-22 19:05:09,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:09,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:09,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:09,894 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-12-22 19:05:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,962 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-22 19:05:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:09,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-22 19:05:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,964 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:05:09,964 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 19:05:09,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:05:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 19:05:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 19:05:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 19:05:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-22 19:05:09,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 18 [2020-12-22 19:05:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,967 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-22 19:05:09,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-22 19:05:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:09,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,968 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:10,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:10,183 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash -207625928, now seen corresponding path program 1 times [2020-12-22 19:05:10,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:10,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094168862] [2020-12-22 19:05:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:10,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094168862] [2020-12-22 19:05:10,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981527365] [2020-12-22 19:05:10,303 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 19:05:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:05:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:10,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:10,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 19:05:10,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182580121] [2020-12-22 19:05:10,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:05:10,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:10,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:05:10,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:10,470 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 12 states. [2020-12-22 19:05:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:10,504 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-22 19:05:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:05:10,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-12-22 19:05:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:10,505 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:05:10,506 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:05:10,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:05:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 19:05:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:05:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 19:05:10,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 20 [2020-12-22 19:05:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:10,512 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 19:05:10,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:05:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 19:05:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:05:10,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:10,513 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:10,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:05:10,727 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:10,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1544531240, now seen corresponding path program 2 times [2020-12-22 19:05:10,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:10,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143656145] [2020-12-22 19:05:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:10,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143656145] [2020-12-22 19:05:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249510118] [2020-12-22 19:05:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:10,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:10,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:05:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:10,893 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 6 treesize of output 5 [2020-12-22 19:05:10,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:10,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:10,899 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:10,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 19:05:10,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:10,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-12-22 19:05:10,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287374700] [2020-12-22 19:05:10,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:10,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:10,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:10,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:05:10,968 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-12-22 19:05:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,078 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-12-22 19:05:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:11,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-22 19:05:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,080 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:05:11,080 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 19:05:11,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 19:05:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2020-12-22 19:05:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 19:05:11,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2020-12-22 19:05:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,084 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 19:05:11,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 19:05:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:05:11,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,086 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,300 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1200625556, now seen corresponding path program 1 times [2020-12-22 19:05:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596834557] [2020-12-22 19:05:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 19:05:11,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596834557] [2020-12-22 19:05:11,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:11,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:11,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078963204] [2020-12-22 19:05:11,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:11,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:11,359 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 4 states. [2020-12-22 19:05:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,405 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-22 19:05:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:11,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-22 19:05:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,409 INFO L225 Difference]: With dead ends: 44 [2020-12-22 19:05:11,409 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 19:05:11,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 19:05:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 19:05:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 19:05:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:05:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-22 19:05:11,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 25 [2020-12-22 19:05:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,413 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-22 19:05:11,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-22 19:05:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:05:11,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,414 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 19:05:11,415 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1200625555, now seen corresponding path program 1 times [2020-12-22 19:05:11,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514146269] [2020-12-22 19:05:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514146269] [2020-12-22 19:05:11,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180809926] [2020-12-22 19:05:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:05:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:11,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 19:05:11,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243246218] [2020-12-22 19:05:11,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:05:11,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:05:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:11,699 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 14 states. [2020-12-22 19:05:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,727 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-22 19:05:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:11,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-22 19:05:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,729 INFO L225 Difference]: With dead ends: 45 [2020-12-22 19:05:11,730 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 19:05:11,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 19:05:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 19:05:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 19:05:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-22 19:05:11,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 25 [2020-12-22 19:05:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,739 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-22 19:05:11,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:05:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-22 19:05:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:11,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,743 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,959 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1631225139, now seen corresponding path program 2 times [2020-12-22 19:05:11,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489292325] [2020-12-22 19:05:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:12,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489292325] [2020-12-22 19:05:12,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132778334] [2020-12-22 19:05:12,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:05:12,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:12,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:05:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:12,169 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 6 treesize of output 5 [2020-12-22 19:05:12,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:12,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:12,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:12,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:05:12,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:12,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-22 19:05:12,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071178308] [2020-12-22 19:05:12,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:12,245 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-12-22 19:05:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,325 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-22 19:05:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:12,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 19:05:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,326 INFO L225 Difference]: With dead ends: 44 [2020-12-22 19:05:12,326 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 19:05:12,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 19:05:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 19:05:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:05:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-22 19:05:12,329 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 26 [2020-12-22 19:05:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,329 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-22 19:05:12,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-22 19:05:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 19:05:12,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,330 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:12,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:05:12,545 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1813766413, now seen corresponding path program 1 times [2020-12-22 19:05:12,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:12,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083353031] [2020-12-22 19:05:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:12,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083353031] [2020-12-22 19:05:12,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364805182] [2020-12-22 19:05:12,667 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 19:05:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:05:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:12,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:12,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 19:05:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562294148] [2020-12-22 19:05:12,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:05:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:05:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:12,932 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 16 states. [2020-12-22 19:05:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,962 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-22 19:05:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:05:12,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-22 19:05:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,963 INFO L225 Difference]: With dead ends: 45 [2020-12-22 19:05:12,963 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 19:05:12,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 19:05:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 19:05:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 19:05:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-22 19:05:12,969 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 27 [2020-12-22 19:05:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,970 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-22 19:05:12,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:05:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-22 19:05:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 19:05:12,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,973 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:13,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:05:13,187 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash 991861075, now seen corresponding path program 2 times [2020-12-22 19:05:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:13,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31853443] [2020-12-22 19:05:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:13,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31853443] [2020-12-22 19:05:13,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344097226] [2020-12-22 19:05:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:13,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:05:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:13,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:13,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-22 19:05:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835996819] [2020-12-22 19:05:13,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:05:13,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:13,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:05:13,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:05:13,600 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 18 states. [2020-12-22 19:05:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:13,643 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-12-22 19:05:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:13,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-12-22 19:05:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:13,644 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:05:13,644 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:05:13,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:05:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:05:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:05:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 19:05:13,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 28 [2020-12-22 19:05:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:13,647 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 19:05:13,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:05:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 19:05:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:05:13,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:13,648 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:13,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:05:13,862 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:13,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2066967283, now seen corresponding path program 3 times [2020-12-22 19:05:13,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:13,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050324246] [2020-12-22 19:05:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050324246] [2020-12-22 19:05:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374113356] [2020-12-22 19:05:14,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:05:14,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:05:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:14,142 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 6 treesize of output 5 [2020-12-22 19:05:14,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,149 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:14,179 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 11 treesize of output 7 [2020-12-22 19:05:14,179 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,187 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-22 19:05:14,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,213 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 19:05:14,215 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-22 19:05:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,252 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 19:05:14,254 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-22 19:05:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,300 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2020-12-22 19:05:14,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,319 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,320 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,320 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2020-12-22 19:05:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2020-12-22 19:05:14,373 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,392 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-22 19:05:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 68 [2020-12-22 19:05:14,457 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,474 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2020-12-22 19:05:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:14,546 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2020-12-22 19:05:14,550 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,572 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,573 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2020-12-22 19:05:14,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2020-12-22 19:05:14,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:14,761 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:14,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:15 [2020-12-22 19:05:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:14,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:14,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2020-12-22 19:05:14,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6285438] [2020-12-22 19:05:14,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:05:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:05:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:14,826 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 23 states. [2020-12-22 19:05:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,150 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-22 19:05:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:05:16,150 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2020-12-22 19:05:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,151 INFO L225 Difference]: With dead ends: 64 [2020-12-22 19:05:16,151 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 19:05:16,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:05:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 19:05:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-12-22 19:05:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:05:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 19:05:16,154 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 29 [2020-12-22 19:05:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,155 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 19:05:16,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:05:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 19:05:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 19:05:16,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,156 INFO L422 BasicCegarLoop]: trace histogram [8, 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 19:05:16,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:05:16,369 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1810687122, now seen corresponding path program 1 times [2020-12-22 19:05:16,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453558498] [2020-12-22 19:05:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 19:05:16,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453558498] [2020-12-22 19:05:16,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:16,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:16,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76353825] [2020-12-22 19:05:16,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:16,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:16,474 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-12-22 19:05:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,533 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-22 19:05:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:16,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-22 19:05:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,534 INFO L225 Difference]: With dead ends: 54 [2020-12-22 19:05:16,534 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:05:16,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 19:05:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:05:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-12-22 19:05:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 19:05:16,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-12-22 19:05:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,537 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 19:05:16,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 19:05:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 19:05:16,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,540 INFO L422 BasicCegarLoop]: trace histogram [8, 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 19:05:16,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 19:05:16,541 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash -767621697, now seen corresponding path program 1 times [2020-12-22 19:05:16,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159312025] [2020-12-22 19:05:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 19:05:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159312025] [2020-12-22 19:05:16,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:16,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:05:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65980260] [2020-12-22 19:05:16,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:16,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:16,654 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 5 states. [2020-12-22 19:05:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,735 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-12-22 19:05:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:16,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-12-22 19:05:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,737 INFO L225 Difference]: With dead ends: 48 [2020-12-22 19:05:16,737 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 19:05:16,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 6 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 19:05:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 19:05:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-22 19:05:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-22 19:05:16,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2020-12-22 19:05:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,740 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-22 19:05:16,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-22 19:05:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 19:05:16,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,741 INFO L422 BasicCegarLoop]: trace histogram [8, 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] [2020-12-22 19:05:16,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 19:05:16,741 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash -811863332, now seen corresponding path program 1 times [2020-12-22 19:05:16,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550073321] [2020-12-22 19:05:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:16,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550073321] [2020-12-22 19:05:16,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119856233] [2020-12-22 19:05:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:05:16,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:05:17,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:17,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-22 19:05:17,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716619619] [2020-12-22 19:05:17,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:05:17,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:05:17,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:05:17,182 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 22 states. [2020-12-22 19:05:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:17,223 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-22 19:05:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:05:17,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-12-22 19:05:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:17,224 INFO L225 Difference]: With dead ends: 47 [2020-12-22 19:05:17,224 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:05:17,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:05:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:05:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 19:05:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:05:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-22 19:05:17,226 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 36 [2020-12-22 19:05:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:17,227 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-22 19:05:17,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:05:17,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-22 19:05:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:05:17,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:17,227 INFO L422 BasicCegarLoop]: trace histogram [9, 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] [2020-12-22 19:05:17,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,432 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1159013500, now seen corresponding path program 2 times [2020-12-22 19:05:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442915311] [2020-12-22 19:05:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 19:05:17,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442915311] [2020-12-22 19:05:17,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:17,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:05:17,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009364399] [2020-12-22 19:05:17,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:17,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:17,518 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-12-22 19:05:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:17,602 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-22 19:05:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:17,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 19:05:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:17,603 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:17,603 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:05:17,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:05:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:05:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-22 19:05:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 19:05:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-22 19:05:17,605 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 37 [2020-12-22 19:05:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-22 19:05:17,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-22 19:05:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 19:05:17,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:17,606 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 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] [2020-12-22 19:05:17,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 19:05:17,607 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -216066079, now seen corresponding path program 1 times [2020-12-22 19:05:17,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721032153] [2020-12-22 19:05:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:05:17,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721032153] [2020-12-22 19:05:17,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713158556] [2020-12-22 19:05:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:05:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:05:18,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:18,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 19:05:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592199003] [2020-12-22 19:05:18,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:05:18,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:05:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:05:18,084 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 24 states. [2020-12-22 19:05:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,116 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-22 19:05:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:05:18,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-12-22 19:05:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,120 INFO L225 Difference]: With dead ends: 50 [2020-12-22 19:05:18,120 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 19:05:18,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:05:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 19:05:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 19:05:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:05:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 19:05:18,123 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 42 [2020-12-22 19:05:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,123 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 19:05:18,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:05:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 19:05:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:05:18,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,124 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 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] [2020-12-22 19:05:18,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:05:18,340 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash -887844479, now seen corresponding path program 2 times [2020-12-22 19:05:18,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752759524] [2020-12-22 19:05:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:05:18,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752759524] [2020-12-22 19:05:18,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270768777] [2020-12-22 19:05:18,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:18,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:05:18,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:18,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-22 19:05:18,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033816523] [2020-12-22 19:05:18,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:05:18,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:05:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:18,919 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 26 states. [2020-12-22 19:05:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,954 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-22 19:05:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:05:18,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-12-22 19:05:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,956 INFO L225 Difference]: With dead ends: 51 [2020-12-22 19:05:18,956 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:05:18,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:05:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:05:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:05:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-22 19:05:18,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 43 [2020-12-22 19:05:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,958 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-22 19:05:18,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:05:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-22 19:05:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 19:05:18,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,959 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 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] [2020-12-22 19:05:19,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,173 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash -238138399, now seen corresponding path program 3 times [2020-12-22 19:05:19,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:19,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763349789] [2020-12-22 19:05:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:05:19,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763349789] [2020-12-22 19:05:19,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428426300] [2020-12-22 19:05:19,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:05:19,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:19,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 19:05:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:19,524 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 6 treesize of output 5 [2020-12-22 19:05:19,525 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-22 19:05:19,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:19,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 18 [2020-12-22 19:05:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550260487] [2020-12-22 19:05:19,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:05:19,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:05:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:05:19,628 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-12-22 19:05:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:20,234 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-22 19:05:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:05:20,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-12-22 19:05:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:20,236 INFO L225 Difference]: With dead ends: 65 [2020-12-22 19:05:20,236 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 19:05:20,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 19:05:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-12-22 19:05:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:05:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-22 19:05:20,239 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 44 [2020-12-22 19:05:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:20,239 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-22 19:05:20,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:05:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-22 19:05:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 19:05:20,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:20,240 INFO L422 BasicCegarLoop]: trace histogram [12, 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, 1, 1] [2020-12-22 19:05:20,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:05:20,445 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1286437294, now seen corresponding path program 1 times [2020-12-22 19:05:20,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:20,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882283063] [2020-12-22 19:05:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:05:20,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882283063] [2020-12-22 19:05:20,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983981996] [2020-12-22 19:05:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:05:21,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:21,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-22 19:05:21,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501075276] [2020-12-22 19:05:21,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:05:21,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:05:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:21,075 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 30 states. [2020-12-22 19:05:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:21,120 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-22 19:05:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:05:21,120 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-12-22 19:05:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:21,121 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:05:21,121 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 19:05:21,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 19:05:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 19:05:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:05:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-22 19:05:21,125 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 49 [2020-12-22 19:05:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:21,125 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-22 19:05:21,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:05:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-22 19:05:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 19:05:21,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:21,126 INFO L422 BasicCegarLoop]: trace histogram [13, 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, 1, 1] [2020-12-22 19:05:21,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:21,342 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1219426482, now seen corresponding path program 2 times [2020-12-22 19:05:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:21,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275551878] [2020-12-22 19:05:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:05:21,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275551878] [2020-12-22 19:05:21,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738748751] [2020-12-22 19:05:21,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:21,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:21,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 19:05:21,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:05:22,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:22,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-22 19:05:22,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110968044] [2020-12-22 19:05:22,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:05:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:05:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:05:22,067 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 32 states. [2020-12-22 19:05:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:22,117 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-22 19:05:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:05:22,118 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-12-22 19:05:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:22,118 INFO L225 Difference]: With dead ends: 59 [2020-12-22 19:05:22,118 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 19:05:22,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:05:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 19:05:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 19:05:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:05:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-12-22 19:05:22,121 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 50 [2020-12-22 19:05:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:22,121 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-12-22 19:05:22,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:05:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-12-22 19:05:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:05:22,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:22,122 INFO L422 BasicCegarLoop]: trace histogram [14, 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, 1, 1] [2020-12-22 19:05:22,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:05:22,337 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:22,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1591792210, now seen corresponding path program 3 times [2020-12-22 19:05:22,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:22,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489890502] [2020-12-22 19:05:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:05:22,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489890502] [2020-12-22 19:05:22,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533477387] [2020-12-22 19:05:22,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:22,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:05:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:22,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:05:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:22,748 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 11 treesize of output 7 [2020-12-22 19:05:22,748 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-22 19:05:22,772 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-22 19:05:22,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 19:05:22,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,777 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 19:05:22,817 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2020-12-22 19:05:22,818 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 19:05:22,820 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,827 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 19:05:22,884 INFO L348 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2020-12-22 19:05:22,885 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2020-12-22 19:05:22,886 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,895 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-22 19:05:22,973 INFO L348 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2020-12-22 19:05:22,973 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2020-12-22 19:05:22,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,985 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,986 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,986 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-22 19:05:23,083 INFO L348 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2020-12-22 19:05:23,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2020-12-22 19:05:23,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:23,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:23,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:23,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-22 19:05:23,227 INFO L348 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2020-12-22 19:05:23,227 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2020-12-22 19:05:23,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:23,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:23,247 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:23,247 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2020-12-22 19:05:23,367 INFO L348 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2020-12-22 19:05:23,367 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 69 treesize of output 25 [2020-12-22 19:05:23,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:23,374 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:23,375 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:23,375 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:7 [2020-12-22 19:05:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-12-22 19:05:23,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:23,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2020-12-22 19:05:23,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680539088] [2020-12-22 19:05:23,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:05:23,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:05:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:23,414 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 28 states. [2020-12-22 19:05:24,193 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-22 19:05:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:24,529 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-12-22 19:05:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:05:24,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-12-22 19:05:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:24,531 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:05:24,531 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 19:05:24,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:05:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 19:05:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-22 19:05:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 19:05:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-12-22 19:05:24,534 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 51 [2020-12-22 19:05:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:24,535 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-12-22 19:05:24,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:05:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-12-22 19:05:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:05:24,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:24,536 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 2, 2, 2, 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] [2020-12-22 19:05:24,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 19:05:24,750 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1005878547, now seen corresponding path program 4 times [2020-12-22 19:05:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:24,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132867161] [2020-12-22 19:05:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 19:05:25,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132867161] [2020-12-22 19:05:25,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438327091] [2020-12-22 19:05:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:25,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:05:25,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:25,256 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 15 treesize of output 7 [2020-12-22 19:05:25,257 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:25,260 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:25,261 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:25,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-12-22 19:05:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:05:25,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:25,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2020-12-22 19:05:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628034835] [2020-12-22 19:05:25,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:05:25,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:05:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:25,289 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 26 states. [2020-12-22 19:05:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:26,004 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-22 19:05:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:05:26,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-12-22 19:05:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:26,006 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:05:26,007 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 19:05:26,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 19:05:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-12-22 19:05:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 19:05:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-22 19:05:26,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2020-12-22 19:05:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:26,010 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-22 19:05:26,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:05:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-22 19:05:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 19:05:26,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:26,011 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:26,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:05:26,226 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash 426595598, now seen corresponding path program 4 times [2020-12-22 19:05:26,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:26,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353232914] [2020-12-22 19:05:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 19:05:26,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353232914] [2020-12-22 19:05:26,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747821011] [2020-12-22 19:05:26,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:26,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:05:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:26,819 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 15 treesize of output 7 [2020-12-22 19:05:26,821 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:26,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:26,825 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:26,825 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-12-22 19:05:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-22 19:05:26,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:26,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-22 19:05:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549618120] [2020-12-22 19:05:26,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:05:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:05:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:05:26,854 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 29 states. [2020-12-22 19:05:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:27,605 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2020-12-22 19:05:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:05:27,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-12-22 19:05:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:27,606 INFO L225 Difference]: With dead ends: 97 [2020-12-22 19:05:27,606 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 19:05:27,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:05:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 19:05:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-12-22 19:05:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 19:05:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-12-22 19:05:27,610 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 59 [2020-12-22 19:05:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:27,610 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-12-22 19:05:27,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:05:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-12-22 19:05:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 19:05:27,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:27,611 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 19:05:27,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:05:27,824 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1298646593, now seen corresponding path program 5 times [2020-12-22 19:05:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:27,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574856087] [2020-12-22 19:05:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 19:05:28,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574856087] [2020-12-22 19:05:28,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215966175] [2020-12-22 19:05:28,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:28,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 19:05:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 19:05:28,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:28,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-22 19:05:28,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200176194] [2020-12-22 19:05:28,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 19:05:28,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:28,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 19:05:28,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:05:28,981 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 40 states. [2020-12-22 19:05:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:29,049 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-12-22 19:05:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:29,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 64 [2020-12-22 19:05:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:29,050 INFO L225 Difference]: With dead ends: 89 [2020-12-22 19:05:29,050 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 19:05:29,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:05:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 19:05:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-22 19:05:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 19:05:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-12-22 19:05:29,054 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 64 [2020-12-22 19:05:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:29,054 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-12-22 19:05:29,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 19:05:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-12-22 19:05:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 19:05:29,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:29,055 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 19:05:29,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:29,269 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:29,270 INFO L82 PathProgramCache]: Analyzing trace with hash -985875617, now seen corresponding path program 6 times [2020-12-22 19:05:29,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:29,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034854749] [2020-12-22 19:05:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 19:05:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034854749] [2020-12-22 19:05:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278230008] [2020-12-22 19:05:29,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:05:30,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:30,176 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 11 treesize of output 7 [2020-12-22 19:05:30,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,179 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-22 19:05:30,197 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-22 19:05:30,198 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 19:05:30,199 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,205 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 19:05:30,248 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2020-12-22 19:05:30,248 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 19:05:30,261 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,268 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 19:05:30,332 INFO L348 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2020-12-22 19:05:30,332 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2020-12-22 19:05:30,337 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,346 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,346 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-22 19:05:30,428 INFO L348 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2020-12-22 19:05:30,428 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2020-12-22 19:05:30,430 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,443 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,443 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-22 19:05:30,557 INFO L348 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2020-12-22 19:05:30,557 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2020-12-22 19:05:30,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,575 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,576 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-22 19:05:30,725 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 33 [2020-12-22 19:05:30,727 INFO L348 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2020-12-22 19:05:30,728 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2020-12-22 19:05:30,737 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,753 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,754 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2020-12-22 19:05:30,954 INFO L348 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2020-12-22 19:05:30,954 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 69 treesize of output 25 [2020-12-22 19:05:30,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,961 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:7 [2020-12-22 19:05:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-22 19:05:31,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:31,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2020-12-22 19:05:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395434512] [2020-12-22 19:05:31,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:05:31,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:05:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:31,020 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 33 states. [2020-12-22 19:05:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:32,199 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-22 19:05:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:05:32,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-22 19:05:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:32,201 INFO L225 Difference]: With dead ends: 77 [2020-12-22 19:05:32,202 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 19:05:32,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:05:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 19:05:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-22 19:05:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 19:05:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-22 19:05:32,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2020-12-22 19:05:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:32,205 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-22 19:05:32,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:05:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-22 19:05:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:05:32,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:32,206 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:32,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:32,414 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:32,415 INFO L82 PathProgramCache]: Analyzing trace with hash -188272279, now seen corresponding path program 5 times [2020-12-22 19:05:32,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:32,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592870733] [2020-12-22 19:05:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 19:05:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592870733] [2020-12-22 19:05:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942638759] [2020-12-22 19:05:32,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:33,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 19:05:33,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:33,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 19:05:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 19:05:34,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:34,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-22 19:05:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146557279] [2020-12-22 19:05:34,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 19:05:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 19:05:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:05:34,006 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 44 states. [2020-12-22 19:05:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:34,096 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-22 19:05:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:05:34,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 67 [2020-12-22 19:05:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:34,097 INFO L225 Difference]: With dead ends: 75 [2020-12-22 19:05:34,097 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:05:34,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:05:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:05:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 19:05:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:05:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-22 19:05:34,101 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 67 [2020-12-22 19:05:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:34,101 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-22 19:05:34,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 19:05:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-22 19:05:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 19:05:34,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:34,102 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:34,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:05:34,307 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:34,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1787808713, now seen corresponding path program 6 times [2020-12-22 19:05:34,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:34,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690678266] [2020-12-22 19:05:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 19:05:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690678266] [2020-12-22 19:05:34,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964951380] [2020-12-22 19:05:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:34,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 19:05:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:05:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:34,896 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 6 treesize of output 5 [2020-12-22 19:05:34,897 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:34,898 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:34,899 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:34,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-22 19:05:34,934 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 11 treesize of output 7 [2020-12-22 19:05:34,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:34,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:34,940 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:34,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-22 19:05:34,968 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-22 19:05:34,969 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 19:05:34,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:34,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:34,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:34,982 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-22 19:05:35,024 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2020-12-22 19:05:35,024 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 19:05:35,026 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:35,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,035 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-22 19:05:35,089 INFO L348 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2020-12-22 19:05:35,090 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2020-12-22 19:05:35,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,102 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:35,103 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,103 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2020-12-22 19:05:35,204 INFO L348 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2020-12-22 19:05:35,204 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2020-12-22 19:05:35,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:35,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,220 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2020-12-22 19:05:35,338 INFO L348 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2020-12-22 19:05:35,338 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2020-12-22 19:05:35,341 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:35,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2020-12-22 19:05:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,432 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2020-12-22 19:05:35,434 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:35,456 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,456 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:74 [2020-12-22 19:05:35,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:35,741 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 25 [2020-12-22 19:05:35,744 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,754 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:35,754 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:35,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:90, output treesize:25 [2020-12-22 19:05:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-22 19:05:35,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:35,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 37 [2020-12-22 19:05:35,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268564589] [2020-12-22 19:05:35,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:05:35,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:35,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:05:35,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:05:35,871 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 37 states. [2020-12-22 19:05:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:38,175 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-22 19:05:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 19:05:38,175 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2020-12-22 19:05:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:38,176 INFO L225 Difference]: With dead ends: 75 [2020-12-22 19:05:38,176 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:05:38,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1094, Invalid=4018, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 19:05:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:05:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 19:05:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 19:05:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-22 19:05:38,180 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 68 [2020-12-22 19:05:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:38,180 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-22 19:05:38,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:05:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-22 19:05:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 19:05:38,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:38,181 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2020-12-22 19:05:38,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:38,389 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:38,389 INFO L82 PathProgramCache]: Analyzing trace with hash 356446778, now seen corresponding path program 7 times [2020-12-22 19:05:38,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:38,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519476493] [2020-12-22 19:05:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 19:05:38,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519476493] [2020-12-22 19:05:38,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332293999] [2020-12-22 19:05:38,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:05:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 19:05:39,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:39,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-22 19:05:39,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072577034] [2020-12-22 19:05:39,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:05:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:05:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:05:39,795 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 48 states. [2020-12-22 19:05:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:39,858 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-22 19:05:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:05:39,859 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 73 [2020-12-22 19:05:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:39,860 INFO L225 Difference]: With dead ends: 75 [2020-12-22 19:05:39,860 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:05:39,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:05:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:05:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 19:05:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:05:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-22 19:05:39,863 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 73 [2020-12-22 19:05:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:39,864 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-22 19:05:39,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 19:05:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-22 19:05:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 19:05:39,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:39,864 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2020-12-22 19:05:40,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:05:40,073 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1795310746, now seen corresponding path program 8 times [2020-12-22 19:05:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:40,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039397342] [2020-12-22 19:05:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 19:05:40,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039397342] [2020-12-22 19:05:40,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350320328] [2020-12-22 19:05:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:40,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:40,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:40,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:05:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 19:05:41,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:41,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-22 19:05:41,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524622544] [2020-12-22 19:05:41,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 19:05:41,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 19:05:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:05:41,555 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 50 states. [2020-12-22 19:05:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:41,650 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-22 19:05:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:05:41,650 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2020-12-22 19:05:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:41,651 INFO L225 Difference]: With dead ends: 76 [2020-12-22 19:05:41,651 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 19:05:41,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:05:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 19:05:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-22 19:05:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 19:05:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-22 19:05:41,655 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 74 [2020-12-22 19:05:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:41,655 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-22 19:05:41,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 19:05:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-22 19:05:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 19:05:41,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:41,656 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2020-12-22 19:05:41,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:05:41,863 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -844546502, now seen corresponding path program 9 times [2020-12-22 19:05:41,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:41,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50142714] [2020-12-22 19:05:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 19:05:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50142714] [2020-12-22 19:05:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114910392] [2020-12-22 19:05:42,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:42,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:05:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:05:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:42,656 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 11 treesize of output 7 [2020-12-22 19:05:42,657 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,663 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,663 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:05:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,679 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 19:05:42,685 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,694 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,694 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-22 19:05:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,729 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,730 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 19:05:42,732 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,741 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,741 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-22 19:05:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,773 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,773 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2020-12-22 19:05:42,777 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,790 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,791 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-22 19:05:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,838 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,838 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2020-12-22 19:05:42,840 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,854 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2020-12-22 19:05:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,919 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2020-12-22 19:05:42,924 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:42,941 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:42,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2020-12-22 19:05:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:43,016 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:43,016 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2020-12-22 19:05:43,019 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:43,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:43,038 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:43,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:65 [2020-12-22 19:05:43,277 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:43,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 57 treesize of output 25 [2020-12-22 19:05:43,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:43,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:43,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:43,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:7 [2020-12-22 19:05:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-12-22 19:05:43,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:43,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-22 19:05:43,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141378650] [2020-12-22 19:05:43,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:05:43,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:43,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:05:43,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:05:43,369 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 39 states. [2020-12-22 19:05:45,174 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-22 19:05:45,571 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 19:05:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:45,883 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-22 19:05:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:05:45,883 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2020-12-22 19:05:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:45,884 INFO L225 Difference]: With dead ends: 85 [2020-12-22 19:05:45,884 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 19:05:45,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1331, Invalid=4521, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 19:05:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 19:05:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-22 19:05:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 19:05:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-12-22 19:05:45,888 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-12-22 19:05:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:45,889 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-12-22 19:05:45,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:05:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-12-22 19:05:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 19:05:45,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:45,890 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:05:46,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:05:46,092 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:46,093 INFO L82 PathProgramCache]: Analyzing trace with hash 727487538, now seen corresponding path program 10 times [2020-12-22 19:05:46,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:46,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161626237] [2020-12-22 19:05:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:05:46,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161626237] [2020-12-22 19:05:46,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131809540] [2020-12-22 19:05:46,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:48,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 19:05:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:05:49,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:49,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2020-12-22 19:05:49,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641461377] [2020-12-22 19:05:49,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 19:05:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 19:05:49,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:05:49,568 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 54 states. [2020-12-22 19:05:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:49,641 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-12-22 19:05:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:05:49,642 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 81 [2020-12-22 19:05:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:49,643 INFO L225 Difference]: With dead ends: 83 [2020-12-22 19:05:49,643 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 19:05:49,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:05:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 19:05:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-22 19:05:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 19:05:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-12-22 19:05:49,647 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 81 [2020-12-22 19:05:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:49,647 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-12-22 19:05:49,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 19:05:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-12-22 19:05:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 19:05:49,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:49,648 INFO L422 BasicCegarLoop]: trace histogram [25, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:05:49,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 19:05:49,862 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1822980462, now seen corresponding path program 11 times [2020-12-22 19:05:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:49,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199500020] [2020-12-22 19:05:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:05:50,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199500020] [2020-12-22 19:05:50,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579562953] [2020-12-22 19:05:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:51,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-22 19:05:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:51,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:05:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:05:52,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:52,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2020-12-22 19:05:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309558445] [2020-12-22 19:05:52,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 19:05:52,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:52,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 19:05:52,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:05:52,537 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 56 states. [2020-12-22 19:05:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:52,629 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-12-22 19:05:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:05:52,629 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 82 [2020-12-22 19:05:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:52,630 INFO L225 Difference]: With dead ends: 84 [2020-12-22 19:05:52,630 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 19:05:52,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:05:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 19:05:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-22 19:05:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 19:05:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-12-22 19:05:52,642 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 82 [2020-12-22 19:05:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:52,642 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-12-22 19:05:52,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 19:05:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-12-22 19:05:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 19:05:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:52,643 INFO L422 BasicCegarLoop]: trace histogram [26, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:05:52,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:05:52,852 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:05:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash 716890162, now seen corresponding path program 12 times [2020-12-22 19:05:52,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:52,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942382267] [2020-12-22 19:05:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:05:53,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942382267] [2020-12-22 19:05:53,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394006533] [2020-12-22 19:05:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:59,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 19:05:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:05:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:00,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:00,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2020-12-22 19:06:00,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622531184] [2020-12-22 19:06:00,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 19:06:00,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:00,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 19:06:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 19:06:00,673 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 58 states. [2020-12-22 19:06:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:00,765 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-22 19:06:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 19:06:00,766 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 83 [2020-12-22 19:06:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:00,767 INFO L225 Difference]: With dead ends: 85 [2020-12-22 19:06:00,767 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 19:06:00,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 19:06:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 19:06:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-22 19:06:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 19:06:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-12-22 19:06:00,770 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 83 [2020-12-22 19:06:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:00,770 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-12-22 19:06:00,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 19:06:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-12-22 19:06:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 19:06:00,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:00,771 INFO L422 BasicCegarLoop]: trace histogram [27, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:06:00,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:00,985 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:06:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:00,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2143468178, now seen corresponding path program 13 times [2020-12-22 19:06:00,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:00,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057602402] [2020-12-22 19:06:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057602402] [2020-12-22 19:06:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001893362] [2020-12-22 19:06:01,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:01,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:06:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:03,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:03,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2020-12-22 19:06:03,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131708632] [2020-12-22 19:06:03,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 19:06:03,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 19:06:03,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:06:03,005 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 60 states. [2020-12-22 19:06:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:03,100 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-12-22 19:06:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 19:06:03,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 84 [2020-12-22 19:06:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:03,101 INFO L225 Difference]: With dead ends: 86 [2020-12-22 19:06:03,102 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 19:06:03,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:06:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 19:06:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 19:06:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 19:06:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-12-22 19:06:03,105 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 84 [2020-12-22 19:06:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:03,105 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-12-22 19:06:03,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 19:06:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-12-22 19:06:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 19:06:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:03,106 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:06:03,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:06:03,320 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:06:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash -877253582, now seen corresponding path program 14 times [2020-12-22 19:06:03,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:03,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777202354] [2020-12-22 19:06:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777202354] [2020-12-22 19:06:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682731142] [2020-12-22 19:06:04,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:04,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:06:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:05,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:05,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2020-12-22 19:06:05,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156220091] [2020-12-22 19:06:05,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 19:06:05,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 19:06:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 19:06:05,466 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 62 states. [2020-12-22 19:06:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:05,556 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-12-22 19:06:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:06:05,557 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 85 [2020-12-22 19:06:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:05,557 INFO L225 Difference]: With dead ends: 87 [2020-12-22 19:06:05,558 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 19:06:05,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 19:06:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 19:06:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-22 19:06:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 19:06:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-12-22 19:06:05,561 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 85 [2020-12-22 19:06:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:05,561 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-12-22 19:06:05,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 19:06:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-12-22 19:06:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 19:06:05,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:05,562 INFO L422 BasicCegarLoop]: trace histogram [29, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:06:05,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:06:05,777 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:06:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:05,778 INFO L82 PathProgramCache]: Analyzing trace with hash -30347630, now seen corresponding path program 15 times [2020-12-22 19:06:05,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:05,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015590940] [2020-12-22 19:06:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015590940] [2020-12-22 19:06:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185103068] [2020-12-22 19:06:06,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:23,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 19:06:23,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:23,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:06:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:25,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:25,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2020-12-22 19:06:25,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772590034] [2020-12-22 19:06:25,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 19:06:25,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 19:06:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 19:06:25,291 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 64 states. [2020-12-22 19:06:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:25,416 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-12-22 19:06:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 19:06:25,419 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 86 [2020-12-22 19:06:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:25,420 INFO L225 Difference]: With dead ends: 88 [2020-12-22 19:06:25,420 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 19:06:25,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 19:06:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 19:06:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 19:06:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 19:06:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-22 19:06:25,424 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 86 [2020-12-22 19:06:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:25,424 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-22 19:06:25,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 19:06:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-22 19:06:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 19:06:25,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:25,425 INFO L422 BasicCegarLoop]: trace histogram [30, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:06:25,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:25,641 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:06:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 453933106, now seen corresponding path program 16 times [2020-12-22 19:06:25,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:25,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931395606] [2020-12-22 19:06:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931395606] [2020-12-22 19:06:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038603501] [2020-12-22 19:06:26,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:31,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:06:31,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:06:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:33,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:33,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2020-12-22 19:06:33,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834199208] [2020-12-22 19:06:33,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 19:06:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 19:06:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 19:06:33,331 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 66 states. [2020-12-22 19:06:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:33,463 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-12-22 19:06:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 19:06:33,464 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 87 [2020-12-22 19:06:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:33,464 INFO L225 Difference]: With dead ends: 89 [2020-12-22 19:06:33,464 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 19:06:33,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 19:06:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 19:06:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-22 19:06:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 19:06:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-12-22 19:06:33,467 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 87 [2020-12-22 19:06:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:33,468 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-12-22 19:06:33,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 19:06:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-12-22 19:06:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 19:06:33,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:33,469 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:06:33,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 19:06:33,683 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:06:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1713233262, now seen corresponding path program 17 times [2020-12-22 19:06:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:33,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066412293] [2020-12-22 19:06:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:34,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066412293] [2020-12-22 19:06:34,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797503606] [2020-12-22 19:06:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:36,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 19:06:36,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:06:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:37,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:37,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-12-22 19:06:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282296830] [2020-12-22 19:06:37,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 19:06:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 19:06:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 19:06:37,847 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 68 states. [2020-12-22 19:06:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:37,977 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-12-22 19:06:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:06:37,978 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 88 [2020-12-22 19:06:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:37,978 INFO L225 Difference]: With dead ends: 90 [2020-12-22 19:06:37,978 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 19:06:37,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 19:06:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 19:06:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 19:06:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 19:06:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-22 19:06:37,985 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 88 [2020-12-22 19:06:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:37,985 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-22 19:06:37,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 19:06:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-22 19:06:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 19:06:37,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:37,986 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:06:38,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:38,203 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:06:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:38,204 INFO L82 PathProgramCache]: Analyzing trace with hash -175913934, now seen corresponding path program 18 times [2020-12-22 19:06:38,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:38,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679311924] [2020-12-22 19:06:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:06:39,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679311924] [2020-12-22 19:06:39,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28378357] [2020-12-22 19:06:39,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:09,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 19:07:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 19:07:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:07:11,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:11,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2020-12-22 19:07:11,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220798091] [2020-12-22 19:07:11,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 19:07:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:11,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 19:07:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 19:07:11,651 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 70 states. [2020-12-22 19:07:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:11,783 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2020-12-22 19:07:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:07:11,784 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 89 [2020-12-22 19:07:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:11,784 INFO L225 Difference]: With dead ends: 91 [2020-12-22 19:07:11,784 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 19:07:11,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 19:07:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 19:07:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-22 19:07:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 19:07:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-12-22 19:07:11,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 89 [2020-12-22 19:07:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:11,788 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-12-22 19:07:11,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 19:07:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-12-22 19:07:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 19:07:11,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:11,789 INFO L422 BasicCegarLoop]: trace histogram [33, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:07:12,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 19:07:12,003 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:07:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 236344978, now seen corresponding path program 19 times [2020-12-22 19:07:12,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:12,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377337440] [2020-12-22 19:07:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:07:13,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377337440] [2020-12-22 19:07:13,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902027851] [2020-12-22 19:07:13,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:13,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:07:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:07:14,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:14,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2020-12-22 19:07:14,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358459953] [2020-12-22 19:07:14,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 19:07:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 19:07:14,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 19:07:14,865 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 72 states. [2020-12-22 19:07:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:15,008 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-12-22 19:07:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 19:07:15,008 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 90 [2020-12-22 19:07:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:15,009 INFO L225 Difference]: With dead ends: 92 [2020-12-22 19:07:15,009 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 19:07:15,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 19:07:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 19:07:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-22 19:07:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 19:07:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-22 19:07:15,011 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 90 [2020-12-22 19:07:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:15,011 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-22 19:07:15,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 19:07:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-22 19:07:15,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 19:07:15,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:15,012 INFO L422 BasicCegarLoop]: trace histogram [34, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:07:15,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 19:07:15,213 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:07:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash 131469362, now seen corresponding path program 20 times [2020-12-22 19:07:15,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:15,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556936286] [2020-12-22 19:07:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:07:16,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556936286] [2020-12-22 19:07:16,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772563108] [2020-12-22 19:07:16,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:16,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:07:16,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:07:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:07:18,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:18,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2020-12-22 19:07:18,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660491149] [2020-12-22 19:07:18,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 19:07:18,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:18,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 19:07:18,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 19:07:18,262 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 74 states. [2020-12-22 19:07:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:18,440 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-12-22 19:07:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 19:07:18,440 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 91 [2020-12-22 19:07:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:18,442 INFO L225 Difference]: With dead ends: 93 [2020-12-22 19:07:18,442 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 19:07:18,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 19:07:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 19:07:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-22 19:07:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 19:07:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-22 19:07:18,444 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2020-12-22 19:07:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:18,445 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-22 19:07:18,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 19:07:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-22 19:07:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 19:07:18,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:18,446 INFO L422 BasicCegarLoop]: trace histogram [35, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:07:18,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 19:07:18,655 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:07:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:18,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1175292562, now seen corresponding path program 21 times [2020-12-22 19:07:18,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:18,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30343863] [2020-12-22 19:07:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:07:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30343863] [2020-12-22 19:07:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139944416] [2020-12-22 19:07:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:15,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-22 19:08:15,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:08:16,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:08:18,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:18,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2020-12-22 19:08:18,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15849328] [2020-12-22 19:08:18,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 19:08:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 19:08:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 19:08:18,313 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 76 states. [2020-12-22 19:08:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:18,451 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-12-22 19:08:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 19:08:18,452 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 92 [2020-12-22 19:08:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:18,453 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:08:18,453 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:08:18,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 19:08:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:08:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 19:08:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 19:08:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-12-22 19:08:18,457 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 92 [2020-12-22 19:08:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:18,457 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-12-22 19:08:18,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 19:08:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-12-22 19:08:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 19:08:18,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:18,458 INFO L422 BasicCegarLoop]: trace histogram [36, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:08:18,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:08:18,660 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:08:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash -825926606, now seen corresponding path program 22 times [2020-12-22 19:08:18,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:18,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214430437] [2020-12-22 19:08:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:08:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214430437] [2020-12-22 19:08:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610962492] [2020-12-22 19:08:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:30,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:08:30,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:30,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 19:08:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:08:32,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:32,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2020-12-22 19:08:32,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144688955] [2020-12-22 19:08:32,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 19:08:32,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:32,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 19:08:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 19:08:32,308 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 78 states. [2020-12-22 19:08:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:32,532 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-12-22 19:08:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:08:32,533 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 93 [2020-12-22 19:08:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:32,534 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:08:32,534 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:08:32,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 19:08:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:08:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-22 19:08:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 19:08:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-12-22 19:08:32,538 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 93 [2020-12-22 19:08:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:32,538 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-12-22 19:08:32,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 19:08:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-12-22 19:08:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 19:08:32,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:32,539 INFO L422 BasicCegarLoop]: trace histogram [37, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:08:32,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:32,754 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:08:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1560788626, now seen corresponding path program 23 times [2020-12-22 19:08:32,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:32,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934138121] [2020-12-22 19:08:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:08:34,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934138121] [2020-12-22 19:08:34,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158927995] [2020-12-22 19:08:34,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:42,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-22 19:08:42,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:08:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:08:44,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:44,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2020-12-22 19:08:44,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87862810] [2020-12-22 19:08:44,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 19:08:44,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 19:08:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 19:08:44,613 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 80 states. [2020-12-22 19:08:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:44,787 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-12-22 19:08:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 19:08:44,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 94 [2020-12-22 19:08:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:44,789 INFO L225 Difference]: With dead ends: 96 [2020-12-22 19:08:44,789 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 19:08:44,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 19:08:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 19:08:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-22 19:08:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 19:08:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-12-22 19:08:44,792 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 94 [2020-12-22 19:08:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:44,792 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-12-22 19:08:44,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 19:08:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-12-22 19:08:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 19:08:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:44,793 INFO L422 BasicCegarLoop]: trace histogram [38, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:08:45,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 19:08:45,008 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:08:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1760450510, now seen corresponding path program 24 times [2020-12-22 19:08:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:45,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572809666] [2020-12-22 19:08:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 19:08:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572809666] [2020-12-22 19:08:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465781498] [2020-12-22 19:08:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true