/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/array-memsafety/openbsd_cstrncmp-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:00:31,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:00:31,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:00:31,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:00:31,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:00:31,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:00:31,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:00:31,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:00:31,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:00:31,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:00:31,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:00:31,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:00:31,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:00:31,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:00:31,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:00:31,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:00:31,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:00:31,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:00:31,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:00:31,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:00:31,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:00:31,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:00:31,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:00:31,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:00:31,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:00:31,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:00:31,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:00:31,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:00:31,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:00:31,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:00:31,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:00:31,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:00:31,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:00:31,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:00:31,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:00:31,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:00:31,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:00:31,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:00:31,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:00:31,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:00:31,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:00:31,838 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:00:31,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:00:31,839 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:00:31,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:00:31,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:00:31,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:00:31,840 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:00:31,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:00:31,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:00:31,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:00:31,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:00:31,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:00:31,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:00:31,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:00:31,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:00:31,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:00:31,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:00:31,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:00:31,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:00:31,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:00:31,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:00:32,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:00:32,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:00:32,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:00:32,265 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:00:32,266 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:00:32,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2020-12-22 19:00:32,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedfac43d/d9dddafaa311443290f4a761991e3962/FLAG0c0d35232 [2020-12-22 19:00:33,172 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:00:33,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2020-12-22 19:00:33,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedfac43d/d9dddafaa311443290f4a761991e3962/FLAG0c0d35232 [2020-12-22 19:00:33,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedfac43d/d9dddafaa311443290f4a761991e3962 [2020-12-22 19:00:33,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:00:33,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:00:33,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:33,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:00:33,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:00:33,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:33" (1/1) ... [2020-12-22 19:00:33,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502a6423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:33, skipping insertion in model container [2020-12-22 19:00:33,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:33" (1/1) ... [2020-12-22 19:00:33,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:00:33,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:00:34,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:34,076 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:00:34,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:34,238 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:00:34,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34 WrapperNode [2020-12-22 19:00:34,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:34,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:34,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:00:34,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:00:34,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:34,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:00:34,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:00:34,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:00:34,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (1/1) ... [2020-12-22 19:00:34,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:00:34,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:00:34,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:00:34,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:00:34,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (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 19:00:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:00:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:00:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:00:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:00:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:00:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:00:35,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:00:35,146 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 19:00:35,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:35 BoogieIcfgContainer [2020-12-22 19:00:35,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:00:35,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:00:35,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:00:35,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:00:35,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:00:33" (1/3) ... [2020-12-22 19:00:35,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53731712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:35, skipping insertion in model container [2020-12-22 19:00:35,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:34" (2/3) ... [2020-12-22 19:00:35,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53731712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:35, skipping insertion in model container [2020-12-22 19:00:35,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:35" (3/3) ... [2020-12-22 19:00:35,160 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2020-12-22 19:00:35,169 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:00:35,176 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-22 19:00:35,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-22 19:00:35,231 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:00:35,231 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:00:35,231 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:00:35,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:00:35,232 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:00:35,232 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:00:35,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:00:35,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:00:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-12-22 19:00:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:35,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:35,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:35,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 19:00:35,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:35,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341467264] [2020-12-22 19:00:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:35,537 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 19:00:35,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341467264] [2020-12-22 19:00:35,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:35,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524337033] [2020-12-22 19:00:35,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:35,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:35,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:35,571 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-12-22 19:00:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:35,636 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-12-22 19:00:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:35,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:00:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:35,650 INFO L225 Difference]: With dead ends: 100 [2020-12-22 19:00:35,650 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 19:00:35,652 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 19:00:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 19:00:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2020-12-22 19:00:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 19:00:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-22 19:00:35,775 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2020-12-22 19:00:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:35,775 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-22 19:00:35,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-22 19:00:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:35,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:35,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:00:35,777 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:35,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-22 19:00:35,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:35,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308462726] [2020-12-22 19:00:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:35,846 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 19:00:35,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308462726] [2020-12-22 19:00:35,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:35,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143823275] [2020-12-22 19:00:35,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:35,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:35,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:35,851 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 3 states. [2020-12-22 19:00:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:35,904 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-22 19:00:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:35,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 19:00:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:35,906 INFO L225 Difference]: With dead ends: 53 [2020-12-22 19:00:35,906 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 19:00:35,907 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 19:00:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 19:00:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 19:00:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:00:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-22 19:00:35,915 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2020-12-22 19:00:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:35,915 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-22 19:00:35,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-22 19:00:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:35,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:35,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:35,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:00:35,917 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:35,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-22 19:00:35,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:35,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087582356] [2020-12-22 19:00:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,005 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 19:00:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087582356] [2020-12-22 19:00:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114305855] [2020-12-22 19:00:36,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:36,009 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 4 states. [2020-12-22 19:00:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,141 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-12-22 19:00:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:36,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:00:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,146 INFO L225 Difference]: With dead ends: 97 [2020-12-22 19:00:36,147 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 19:00:36,147 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 19:00:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 19:00:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-12-22 19:00:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 19:00:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-22 19:00:36,163 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2020-12-22 19:00:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,164 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-22 19:00:36,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-22 19:00:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:36,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:36,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:00:36,165 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-22 19:00:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:36,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288393584] [2020-12-22 19:00:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,283 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 19:00:36,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288393584] [2020-12-22 19:00:36,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:36,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390358269] [2020-12-22 19:00:36,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:36,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:36,286 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 4 states. [2020-12-22 19:00:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,332 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-12-22 19:00:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:36,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:00:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,334 INFO L225 Difference]: With dead ends: 54 [2020-12-22 19:00:36,334 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:00:36,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 19:00:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:00:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 19:00:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:00:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-22 19:00:36,340 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2020-12-22 19:00:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,341 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-22 19:00:36,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-22 19:00:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:36,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:36,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:00:36,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-22 19:00:36,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:36,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527984956] [2020-12-22 19:00:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,386 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 19:00:36,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527984956] [2020-12-22 19:00:36,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:36,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614374205] [2020-12-22 19:00:36,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:36,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:36,390 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 4 states. [2020-12-22 19:00:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,425 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-12-22 19:00:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:36,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:00:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,427 INFO L225 Difference]: With dead ends: 98 [2020-12-22 19:00:36,427 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 19:00:36,428 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 19:00:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 19:00:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-12-22 19:00:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 19:00:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-12-22 19:00:36,436 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2020-12-22 19:00:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,436 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-12-22 19:00:36,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-12-22 19:00:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:36,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:36,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:00:36,438 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-22 19:00:36,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:36,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897066917] [2020-12-22 19:00:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,469 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 19:00:36,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897066917] [2020-12-22 19:00:36,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:36,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:36,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426486238] [2020-12-22 19:00:36,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:36,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:36,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:36,472 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 3 states. [2020-12-22 19:00:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,517 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-12-22 19:00:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:36,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 19:00:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,519 INFO L225 Difference]: With dead ends: 63 [2020-12-22 19:00:36,519 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 19:00:36,519 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 19:00:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 19:00:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 19:00:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:00:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-22 19:00:36,536 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2020-12-22 19:00:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,537 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-22 19:00:36,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-22 19:00:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:36,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:36,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:00:36,541 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-22 19:00:36,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:36,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267408120] [2020-12-22 19:00:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,650 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 19:00:36,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267408120] [2020-12-22 19:00:36,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:36,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:36,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991225809] [2020-12-22 19:00:36,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:36,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:36,654 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 5 states. [2020-12-22 19:00:36,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,757 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-12-22 19:00:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:36,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 19:00:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,759 INFO L225 Difference]: With dead ends: 98 [2020-12-22 19:00:36,759 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 19:00:36,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 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 19:00:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 19:00:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-12-22 19:00:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 19:00:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-12-22 19:00:36,766 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2020-12-22 19:00:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,767 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-12-22 19:00:36,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-12-22 19:00:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 19:00:36,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:36,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:00:36,768 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-22 19:00:36,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:36,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258486321] [2020-12-22 19:00:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,829 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 19:00:36,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258486321] [2020-12-22 19:00:36,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:36,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539142421] [2020-12-22 19:00:36,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:36,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:36,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:36,833 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 4 states. [2020-12-22 19:00:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,893 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-12-22 19:00:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:36,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 19:00:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,896 INFO L225 Difference]: With dead ends: 64 [2020-12-22 19:00:36,896 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 19:00:36,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 19:00:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 19:00:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 19:00:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:00:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-12-22 19:00:36,913 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2020-12-22 19:00:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,913 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-12-22 19:00:36,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-12-22 19:00:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,915 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:36,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 19:00:36,916 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 19:00:36,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:36,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343770783] [2020-12-22 19:00:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:37,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343770783] [2020-12-22 19:00:37,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665213127] [2020-12-22 19:00:37,071 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 19:00:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:37,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:00:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:37,209 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_30|]} [2020-12-22 19:00:37,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:37,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:37,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:37,241 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:37,250 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:00:37,258 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:37,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:37,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:37,272 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:00:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:37,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:37,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:00:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923139313] [2020-12-22 19:00:37,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:37,314 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 6 states. [2020-12-22 19:00:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:37,432 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-12-22 19:00:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:37,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:00:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:37,433 INFO L225 Difference]: With dead ends: 107 [2020-12-22 19:00:37,433 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 19:00:37,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 19:00:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 59. [2020-12-22 19:00:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:00:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-22 19:00:37,439 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2020-12-22 19:00:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:37,440 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-22 19:00:37,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-22 19:00:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:37,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:37,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:37,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 19:00:37,657 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446106, now seen corresponding path program 1 times [2020-12-22 19:00:37,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:37,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954933730] [2020-12-22 19:00:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:37,737 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 19:00:37,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954933730] [2020-12-22 19:00:37,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:37,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546910836] [2020-12-22 19:00:37,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:37,743 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 4 states. [2020-12-22 19:00:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:37,789 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-12-22 19:00:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:37,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-22 19:00:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:37,790 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:00:37,791 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:00:37,791 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 19:00:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:00:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 19:00:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:00:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 19:00:37,800 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2020-12-22 19:00:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:37,800 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 19:00:37,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 19:00:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:37,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:37,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 19:00:37,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446105, now seen corresponding path program 1 times [2020-12-22 19:00:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:37,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537698429] [2020-12-22 19:00:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:37,943 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 19:00:37,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537698429] [2020-12-22 19:00:37,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:37,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14149619] [2020-12-22 19:00:37,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:37,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:37,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:37,946 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 6 states. [2020-12-22 19:00:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:38,048 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-12-22 19:00:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:38,048 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 19:00:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:38,049 INFO L225 Difference]: With dead ends: 72 [2020-12-22 19:00:38,049 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 19:00:38,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 19:00:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2020-12-22 19:00:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:00:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-12-22 19:00:38,054 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 13 [2020-12-22 19:00:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:38,054 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-12-22 19:00:38,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-12-22 19:00:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:38,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:38,055 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:38,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 19:00:38,056 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-22 19:00:38,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:38,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474165138] [2020-12-22 19:00:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:38,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474165138] [2020-12-22 19:00:38,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193418634] [2020-12-22 19:00:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:00:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:38,207 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:38,207 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:38,211 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:38,228 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:00:38,232 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:38,233 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:00:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:38,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:38,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 19:00:38,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445010072] [2020-12-22 19:00:38,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:38,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:38,283 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 7 states. [2020-12-22 19:00:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:38,422 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-12-22 19:00:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:38,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 19:00:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:38,423 INFO L225 Difference]: With dead ends: 96 [2020-12-22 19:00:38,423 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 19:00:38,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 19:00:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 59. [2020-12-22 19:00:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:00:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-22 19:00:38,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 13 [2020-12-22 19:00:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:38,428 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-22 19:00:38,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-22 19:00:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:00:38,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:38,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 19:00:38,645 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 172810365, now seen corresponding path program 1 times [2020-12-22 19:00:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:38,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227221789] [2020-12-22 19:00:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:38,751 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 19:00:38,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227221789] [2020-12-22 19:00:38,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:38,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:38,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151771267] [2020-12-22 19:00:38,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:38,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:38,758 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 4 states. [2020-12-22 19:00:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:38,797 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-12-22 19:00:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:38,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 19:00:38,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:38,798 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:00:38,798 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:00:38,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:00:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 19:00:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:00:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-22 19:00:38,802 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2020-12-22 19:00:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:38,803 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-22 19:00:38,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-22 19:00:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:00:38,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:38,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:38,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 19:00:38,804 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1062174023, now seen corresponding path program 1 times [2020-12-22 19:00:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:38,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339935458] [2020-12-22 19:00:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:38,840 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 19:00:38,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339935458] [2020-12-22 19:00:38,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:38,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:38,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535177606] [2020-12-22 19:00:38,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:38,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:38,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:38,843 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 5 states. [2020-12-22 19:00:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:38,913 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-22 19:00:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:38,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 19:00:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:38,914 INFO L225 Difference]: With dead ends: 53 [2020-12-22 19:00:38,914 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 19:00:38,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 19:00:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 19:00:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:00:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-22 19:00:38,918 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 15 [2020-12-22 19:00:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:38,918 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-22 19:00:38,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-22 19:00:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:00:38,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:38,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:38,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 19:00:38,920 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:38,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1062174024, now seen corresponding path program 1 times [2020-12-22 19:00:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:38,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160024585] [2020-12-22 19:00:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:38,996 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 19:00:38,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160024585] [2020-12-22 19:00:38,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:38,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:00:38,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255397130] [2020-12-22 19:00:38,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:38,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:38,998 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 7 states. [2020-12-22 19:00:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:39,113 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-12-22 19:00:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:39,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-22 19:00:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:39,114 INFO L225 Difference]: With dead ends: 53 [2020-12-22 19:00:39,114 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 19:00:39,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 19:00:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 19:00:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:00:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-22 19:00:39,118 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 15 [2020-12-22 19:00:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:39,118 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-22 19:00:39,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-22 19:00:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:39,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:39,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:39,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 19:00:39,119 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1452978584, now seen corresponding path program 1 times [2020-12-22 19:00:39,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:39,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720253871] [2020-12-22 19:00:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:39,151 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 19:00:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720253871] [2020-12-22 19:00:39,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:39,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225583451] [2020-12-22 19:00:39,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:39,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:39,153 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 4 states. [2020-12-22 19:00:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:39,199 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-22 19:00:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:39,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 19:00:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:39,200 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:00:39,200 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:00:39,201 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 19:00:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:00:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:00:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:00:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-12-22 19:00:39,203 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 17 [2020-12-22 19:00:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:39,204 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-12-22 19:00:39,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-12-22 19:00:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:39,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:39,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:39,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 19:00:39,206 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1452978583, now seen corresponding path program 1 times [2020-12-22 19:00:39,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:39,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116975688] [2020-12-22 19:00:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:39,282 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 19:00:39,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116975688] [2020-12-22 19:00:39,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:39,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:00:39,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706574685] [2020-12-22 19:00:39,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:39,285 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 7 states. [2020-12-22 19:00:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:39,399 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-12-22 19:00:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:39,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 19:00:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:39,400 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:00:39,400 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 19:00:39,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:00:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 19:00:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-22 19:00:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:00:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-22 19:00:39,404 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2020-12-22 19:00:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:39,405 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-22 19:00:39,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-22 19:00:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 19:00:39,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:39,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:39,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 19:00:39,406 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash -448353975, now seen corresponding path program 1 times [2020-12-22 19:00:39,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:39,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826891981] [2020-12-22 19:00:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:39,476 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 19:00:39,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826891981] [2020-12-22 19:00:39,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:39,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:39,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314541621] [2020-12-22 19:00:39,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:39,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:39,484 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 5 states. [2020-12-22 19:00:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:39,575 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-22 19:00:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:39,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-22 19:00:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:39,577 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:00:39,577 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:00:39,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:00:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:00:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:00:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-12-22 19:00:39,582 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 19 [2020-12-22 19:00:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:39,583 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-12-22 19:00:39,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-12-22 19:00:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 19:00:39,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:39,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:39,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 19:00:39,584 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:39,585 INFO L82 PathProgramCache]: Analyzing trace with hash -448353974, now seen corresponding path program 1 times [2020-12-22 19:00:39,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:39,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241646458] [2020-12-22 19:00:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:39,756 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 19:00:39,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241646458] [2020-12-22 19:00:39,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:39,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 19:00:39,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004131375] [2020-12-22 19:00:39,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:00:39,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:00:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:39,765 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2020-12-22 19:00:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:39,968 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-12-22 19:00:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:00:39,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 19:00:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:39,969 INFO L225 Difference]: With dead ends: 60 [2020-12-22 19:00:39,969 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:00:39,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:00:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:00:39,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-12-22 19:00:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:00:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-22 19:00:39,972 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2020-12-22 19:00:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:39,972 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-22 19:00:39,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:00:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-22 19:00:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:39,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:39,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:39,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 19:00:39,974 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1075479959, now seen corresponding path program 1 times [2020-12-22 19:00:39,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:39,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793964922] [2020-12-22 19:00:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:40,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793964922] [2020-12-22 19:00:40,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:40,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 19:00:40,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303640028] [2020-12-22 19:00:40,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:00:40,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:00:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:40,166 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 8 states. [2020-12-22 19:00:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:40,349 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-12-22 19:00:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:00:40,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-22 19:00:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:40,350 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:00:40,350 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:00:40,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:00:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:00:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:00:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-22 19:00:40,353 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2020-12-22 19:00:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:40,353 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-22 19:00:40,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:00:40,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-22 19:00:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:40,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:40,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:40,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 19:00:40,355 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:40,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1530543595, now seen corresponding path program 1 times [2020-12-22 19:00:40,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:40,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003036778] [2020-12-22 19:00:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:40,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003036778] [2020-12-22 19:00:40,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:40,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 19:00:40,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899984275] [2020-12-22 19:00:40,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:00:40,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:40,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:00:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:40,586 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2020-12-22 19:00:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:40,782 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-12-22 19:00:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:00:40,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-22 19:00:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:40,784 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:00:40,784 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:00:40,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:00:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:00:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-22 19:00:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:00:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-22 19:00:40,788 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2020-12-22 19:00:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:40,788 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-22 19:00:40,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:00:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-22 19:00:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:00:40,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:40,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:40,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 19:00:40,789 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1247746578, now seen corresponding path program 1 times [2020-12-22 19:00:40,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:40,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259303523] [2020-12-22 19:00:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:40,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259303523] [2020-12-22 19:00:40,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850349820] [2020-12-22 19:00:40,936 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 19:00:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:00:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:41,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:41,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 19:00:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028761891] [2020-12-22 19:00:41,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:00:41,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:00:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:00:41,198 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 14 states. [2020-12-22 19:00:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:41,485 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-12-22 19:00:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:00:41,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-22 19:00:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:41,487 INFO L225 Difference]: With dead ends: 66 [2020-12-22 19:00:41,487 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 19:00:41,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:00:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 19:00:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-12-22 19:00:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 19:00:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-12-22 19:00:41,490 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 25 [2020-12-22 19:00:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:41,490 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-12-22 19:00:41,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:00:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-12-22 19:00:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 19:00:41,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:41,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:41,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:00:41,705 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash -788585585, now seen corresponding path program 1 times [2020-12-22 19:00:41,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:41,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993810986] [2020-12-22 19:00:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993810986] [2020-12-22 19:00:41,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:41,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 19:00:41,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423592044] [2020-12-22 19:00:41,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:00:41,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:41,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:00:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:00:41,932 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 11 states. [2020-12-22 19:00:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:42,158 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-12-22 19:00:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:42,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-12-22 19:00:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:42,159 INFO L225 Difference]: With dead ends: 66 [2020-12-22 19:00:42,159 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 19:00:42,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:00:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 19:00:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 19:00:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:00:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-22 19:00:42,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2020-12-22 19:00:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:42,163 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-22 19:00:42,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:00:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-22 19:00:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 19:00:42,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:42,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:42,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 19:00:42,164 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash -922599091, now seen corresponding path program 1 times [2020-12-22 19:00:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:42,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916012267] [2020-12-22 19:00:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:42,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916012267] [2020-12-22 19:00:42,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:42,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 19:00:42,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810431977] [2020-12-22 19:00:42,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:00:42,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:00:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:00:42,401 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 13 states. [2020-12-22 19:00:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:42,704 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-12-22 19:00:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:00:42,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-22 19:00:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:42,705 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:00:42,705 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:00:42,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:00:42,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:00:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-22 19:00:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 19:00:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-22 19:00:42,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 27 [2020-12-22 19:00:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:42,709 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-22 19:00:42,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:00:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-22 19:00:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 19:00:42,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:42,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 19:00:42,712 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 904511312, now seen corresponding path program 1 times [2020-12-22 19:00:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:42,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522457653] [2020-12-22 19:00:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:42,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522457653] [2020-12-22 19:00:42,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450067898] [2020-12-22 19:00:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:42,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:00:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:43,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:43,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2020-12-22 19:00:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790685268] [2020-12-22 19:00:43,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:00:43,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:00:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:00:43,160 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 16 states. [2020-12-22 19:00:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:43,465 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 19:00:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:00:43,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-22 19:00:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:43,466 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:00:43,466 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:00:43,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:00:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:00:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-22 19:00:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 19:00:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-22 19:00:43,468 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 31 [2020-12-22 19:00:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:43,469 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-22 19:00:43,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:00:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-22 19:00:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:00:43,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:43,470 INFO L422 BasicCegarLoop]: trace histogram [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 19:00:43,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:43,685 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1651977841, now seen corresponding path program 1 times [2020-12-22 19:00:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:43,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142667934] [2020-12-22 19:00:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142667934] [2020-12-22 19:00:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045795332] [2020-12-22 19:00:43,768 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 19:00:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:00:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:43,868 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_31|]} [2020-12-22 19:00:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:43,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:43,874 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:43,883 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:43,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:00:43,891 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:43,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:43,903 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:43,903 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:00:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:44,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:44,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-22 19:00:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51829222] [2020-12-22 19:00:44,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:00:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:44,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:00:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:00:44,078 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 14 states. [2020-12-22 19:00:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:44,534 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 19:00:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:44,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-22 19:00:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:44,535 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:00:44,535 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:00:44,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:00:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:00:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-12-22 19:00:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 19:00:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-22 19:00:44,538 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2020-12-22 19:00:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:44,538 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-22 19:00:44,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:00:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-22 19:00:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 19:00:44,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:44,539 INFO L422 BasicCegarLoop]: trace histogram [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 19:00:44,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:00:44,754 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1587501230, now seen corresponding path program 1 times [2020-12-22 19:00:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:44,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592031803] [2020-12-22 19:00:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:44,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592031803] [2020-12-22 19:00:44,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580256818] [2020-12-22 19:00:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:00:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:45,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:45,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2020-12-22 19:00:45,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342061829] [2020-12-22 19:00:45,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:00:45,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:00:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:00:45,172 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2020-12-22 19:00:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:45,523 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-22 19:00:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:45,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-12-22 19:00:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:45,527 INFO L225 Difference]: With dead ends: 59 [2020-12-22 19:00:45,527 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 19:00:45,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:00:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 19:00:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-22 19:00:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 19:00:45,530 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2020-12-22 19:00:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:45,530 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 19:00:45,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:00:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 19:00:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:00:45,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:45,531 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 19:00:45,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:45,744 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash -579332495, now seen corresponding path program 1 times [2020-12-22 19:00:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:45,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556777047] [2020-12-22 19:00:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556777047] [2020-12-22 19:00:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457966387] [2020-12-22 19:00:46,057 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 19:00:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 19:00:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:46,232 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 14 treesize of output 10 [2020-12-22 19:00:46,233 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:46,239 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:46,241 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:46,242 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:00:46,590 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 19:00:46,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:46,593 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:46,594 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 19:00:46,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:00:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:46,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:46,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2020-12-22 19:00:46,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101155880] [2020-12-22 19:00:46,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:00:46,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:46,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:00:46,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:00:46,604 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 22 states. [2020-12-22 19:00:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:48,498 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2020-12-22 19:00:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 19:00:48,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-12-22 19:00:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:48,500 INFO L225 Difference]: With dead ends: 127 [2020-12-22 19:00:48,500 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 19:00:48,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=398, Invalid=2254, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:00:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 19:00:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-22 19:00:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:00:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 19:00:48,503 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 37 [2020-12-22 19:00:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:48,503 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 19:00:48,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:00:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 19:00:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:00:48,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:48,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:48,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:00:48,705 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -491067849, now seen corresponding path program 2 times [2020-12-22 19:00:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:48,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424713026] [2020-12-22 19:00:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:48,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424713026] [2020-12-22 19:00:48,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746025316] [2020-12-22 19:00:48,887 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 19:00:48,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:48,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:00:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:49,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:49,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-12-22 19:00:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993339137] [2020-12-22 19:00:49,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:00:49,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:00:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:00:49,156 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 17 states. [2020-12-22 19:00:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:49,519 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-22 19:00:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:49,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-12-22 19:00:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:49,520 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:00:49,521 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 19:00:49,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:00:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 19:00:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-12-22 19:00:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:00:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-22 19:00:49,523 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 45 [2020-12-22 19:00:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:49,523 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-22 19:00:49,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:00:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-22 19:00:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:00:49,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:49,524 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:49,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:00:49,738 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash 530199960, now seen corresponding path program 2 times [2020-12-22 19:00:49,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:49,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273140241] [2020-12-22 19:00:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:49,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273140241] [2020-12-22 19:00:49,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776004799] [2020-12-22 19:00:49,909 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 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 19:00:49,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:49,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:00:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:50,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:50,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-12-22 19:00:50,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68426822] [2020-12-22 19:00:50,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:00:50,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:50,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:00:50,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:00:50,155 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 18 states. [2020-12-22 19:00:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:50,492 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-22 19:00:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:50,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-12-22 19:00:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:50,494 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:00:50,494 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 19:00:50,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:00:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 19:00:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 19:00:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 19:00:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-12-22 19:00:50,496 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2020-12-22 19:00:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:50,497 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-12-22 19:00:50,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:00:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-12-22 19:00:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:00:50,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:50,497 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:50,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:50,706 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1243825766, now seen corresponding path program 2 times [2020-12-22 19:00:50,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:50,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803114824] [2020-12-22 19:00:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803114824] [2020-12-22 19:00:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716494536] [2020-12-22 19:00:50,927 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 19:00:50,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:00:50,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:00:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 19:00:51,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:51,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2020-12-22 19:00:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627848391] [2020-12-22 19:00:51,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:51,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:00:51,115 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 5 states. [2020-12-22 19:00:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:51,187 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-22 19:00:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:51,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 19:00:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:51,188 INFO L225 Difference]: With dead ends: 60 [2020-12-22 19:00:51,189 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:00:51,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:00:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:00:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 19:00:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:00:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-22 19:00:51,192 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2020-12-22 19:00:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:51,192 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-22 19:00:51,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-22 19:00:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 19:00:51,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:51,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:51,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:51,406 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1019693383, now seen corresponding path program 3 times [2020-12-22 19:00:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214536431] [2020-12-22 19:00:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214536431] [2020-12-22 19:00:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417575827] [2020-12-22 19:00:51,678 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 19:00:51,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:00:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 19:00:51,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:52,044 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 14 treesize of output 10 [2020-12-22 19:00:52,045 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:52,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:52,057 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:52,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 19:00:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:52,957 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-12-22 19:00:52,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 21 [2020-12-22 19:00:52,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:52,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:52,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:52,988 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:46, output treesize:3 [2020-12-22 19:00:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:00:53,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:53,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 31 [2020-12-22 19:00:53,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206963197] [2020-12-22 19:00:53,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:00:53,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:00:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:00:53,012 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 31 states. [2020-12-22 19:00:54,558 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 19:00:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:57,120 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2020-12-22 19:00:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 19:00:57,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2020-12-22 19:00:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:57,121 INFO L225 Difference]: With dead ends: 166 [2020-12-22 19:00:57,121 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 19:00:57,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=648, Invalid=4902, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 19:00:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 19:00:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-12-22 19:00:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 19:00:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-12-22 19:00:57,125 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2020-12-22 19:00:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:57,126 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-12-22 19:00:57,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:00:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-12-22 19:00:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:00:57,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:57,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:57,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:00:57,328 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2077042049, now seen corresponding path program 4 times [2020-12-22 19:00:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:57,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287372370] [2020-12-22 19:00:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:00:57,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287372370] [2020-12-22 19:00:57,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887251782] [2020-12-22 19:00:57,566 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 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 19:00:57,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:00:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 19:00:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:00:58,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:58,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2020-12-22 19:00:58,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326065745] [2020-12-22 19:00:58,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:00:58,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:00:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:00:58,213 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-12-22 19:00:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,145 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-22 19:00:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:00:59,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-12-22 19:00:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,146 INFO L225 Difference]: With dead ends: 75 [2020-12-22 19:00:59,146 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:00:59,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:00:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:00:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-12-22 19:00:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 19:00:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-12-22 19:00:59,150 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-12-22 19:00:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,150 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-12-22 19:00:59,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:00:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-12-22 19:00:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 19:00:59,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,151 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:59,359 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1122383840, now seen corresponding path program 3 times [2020-12-22 19:00:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346303764] [2020-12-22 19:00:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:00:59,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346303764] [2020-12-22 19:00:59,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734669967] [2020-12-22 19:00:59,589 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 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 19:00:59,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:00:59,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:00:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:01:00,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:00,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2020-12-22 19:01:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130625227] [2020-12-22 19:01:00,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:01:00,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:01:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:01:00,019 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 25 states. [2020-12-22 19:01:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:00,642 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-12-22 19:01:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:01:00,643 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-12-22 19:01:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:00,644 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:01:00,644 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:01:00,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:01:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:01:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 19:01:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 19:01:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-22 19:01:00,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2020-12-22 19:01:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:00,648 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-22 19:01:00,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:01:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-22 19:01:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 19:01:00,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:00,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:00,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:01:00,863 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:00,864 INFO L82 PathProgramCache]: Analyzing trace with hash -356785407, now seen corresponding path program 5 times [2020-12-22 19:01:00,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:00,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082940470] [2020-12-22 19:01:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:01:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082940470] [2020-12-22 19:01:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480966355] [2020-12-22 19:01:01,233 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 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 19:01:01,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 19:01:01,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 19:01:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:01,936 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 14 treesize of output 10 [2020-12-22 19:01:01,937 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,944 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:01,945 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:02,545 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 19:01:02,546 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:02,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:02,548 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 19:01:02,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:01:02,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:02,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2020-12-22 19:01:02,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159751639] [2020-12-22 19:01:02,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:01:02,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:01:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:01:02,573 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-12-22 19:01:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:06,376 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2020-12-22 19:01:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 19:01:06,377 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-12-22 19:01:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:06,378 INFO L225 Difference]: With dead ends: 210 [2020-12-22 19:01:06,378 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 19:01:06,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=566, Invalid=4546, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 19:01:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 19:01:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-12-22 19:01:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 19:01:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-22 19:01:06,382 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 69 [2020-12-22 19:01:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:06,382 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-22 19:01:06,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:01:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-22 19:01:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:01:06,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:06,383 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:06,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:06,594 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:06,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1781179705, now seen corresponding path program 6 times [2020-12-22 19:01:06,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:06,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318395149] [2020-12-22 19:01:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:06,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318395149] [2020-12-22 19:01:06,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892356845] [2020-12-22 19:01:06,879 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 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 19:01:07,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:01:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 19:01:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:07,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:07,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2020-12-22 19:01:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691048334] [2020-12-22 19:01:07,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:01:07,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:01:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:01:07,438 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 27 states. [2020-12-22 19:01:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:08,387 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-12-22 19:01:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:01:08,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-12-22 19:01:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:08,389 INFO L225 Difference]: With dead ends: 91 [2020-12-22 19:01:08,389 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 19:01:08,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:01:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 19:01:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-12-22 19:01:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 19:01:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-22 19:01:08,392 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-12-22 19:01:08,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:08,392 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-22 19:01:08,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:01:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-22 19:01:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 19:01:08,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:08,393 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:08,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:01:08,607 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1978254888, now seen corresponding path program 4 times [2020-12-22 19:01:08,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:08,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106344066] [2020-12-22 19:01:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:08,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106344066] [2020-12-22 19:01:08,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136402519] [2020-12-22 19:01:08,887 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 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 19:01:09,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:09,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 19:01:09,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:09,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:09,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2020-12-22 19:01:09,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98418166] [2020-12-22 19:01:09,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:01:09,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:01:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:01:09,368 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 24 states. [2020-12-22 19:01:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:09,986 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-22 19:01:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:01:09,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-12-22 19:01:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:09,988 INFO L225 Difference]: With dead ends: 90 [2020-12-22 19:01:09,988 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 19:01:09,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:01:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 19:01:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-22 19:01:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 19:01:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-12-22 19:01:09,992 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 79 [2020-12-22 19:01:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:09,992 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-12-22 19:01:09,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:01:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-12-22 19:01:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 19:01:09,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:09,994 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:10,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:10,208 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash 622697289, now seen corresponding path program 7 times [2020-12-22 19:01:10,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:10,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065828139] [2020-12-22 19:01:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:10,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065828139] [2020-12-22 19:01:10,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097431075] [2020-12-22 19:01:10,652 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 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 19:01:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 19:01:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:10,786 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:01:10,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,790 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,791 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:01:11,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:11,084 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:11,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:11,093 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:11,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:11,171 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 25 treesize of output 24 [2020-12-22 19:01:11,172 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:11,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:11,184 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:11,185 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:01:12,005 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:12,005 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:01:12,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:12,026 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:01:12,029 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:12,029 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:01:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:12,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:12,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2020-12-22 19:01:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852258920] [2020-12-22 19:01:12,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:01:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:01:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:01:12,102 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 33 states. [2020-12-22 19:01:17,004 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 19:01:21,154 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:25,348 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:29,203 WARN L197 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:33,421 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:37,632 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:41,770 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:01:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:41,783 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2020-12-22 19:01:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:01:41,784 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 85 [2020-12-22 19:01:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:41,785 INFO L225 Difference]: With dead ends: 156 [2020-12-22 19:01:41,786 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 19:01:41,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:01:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 19:01:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-12-22 19:01:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 19:01:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-12-22 19:01:41,791 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 85 [2020-12-22 19:01:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:41,791 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-12-22 19:01:41,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:01:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-12-22 19:01:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 19:01:41,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:41,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:42,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:01:42,007 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash 224549964, now seen corresponding path program 8 times [2020-12-22 19:01:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:42,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906174128] [2020-12-22 19:01:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:42,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906174128] [2020-12-22 19:01:42,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305761643] [2020-12-22 19:01:42,427 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 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 19:01:42,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:42,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 19:01:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:01:42,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:42,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2020-12-22 19:01:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822105913] [2020-12-22 19:01:42,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:01:42,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:01:42,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:01:42,918 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 26 states. [2020-12-22 19:01:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:43,854 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-12-22 19:01:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:01:43,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2020-12-22 19:01:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:43,856 INFO L225 Difference]: With dead ends: 103 [2020-12-22 19:01:43,856 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 19:01:43,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:01:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 19:01:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-12-22 19:01:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 19:01:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-22 19:01:43,859 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-12-22 19:01:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:43,860 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-22 19:01:43,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:01:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-22 19:01:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 19:01:43,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:43,861 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:44,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:01:44,075 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1044150893, now seen corresponding path program 5 times [2020-12-22 19:01:44,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:44,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634119370] [2020-12-22 19:01:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:45,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634119370] [2020-12-22 19:01:45,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921856225] [2020-12-22 19:01:45,034 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 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 19:01:45,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 19:01:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 114 conjunts are in the unsatisfiable core [2020-12-22 19:01:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:45,783 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:45,784 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:45,785 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:45,811 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-22 19:01:45,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:45,815 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:15 [2020-12-22 19:01:46,494 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 15 treesize of output 11 [2020-12-22 19:01:46,495 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:46,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:46,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:46,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-22 19:01:47,482 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 18 [2020-12-22 19:01:47,484 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:47,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:47,506 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:47,506 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:38 [2020-12-22 19:01:47,755 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:47,773 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-12-22 19:01:47,773 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:01:47,775 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:47,784 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:47,786 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:47,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:3 [2020-12-22 19:01:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:47,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:47,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 53 [2020-12-22 19:01:47,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434842850] [2020-12-22 19:01:47,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 19:01:47,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:47,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 19:01:47,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2587, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:01:47,845 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 53 states. [2020-12-22 19:01:51,967 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 19:01:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:52,333 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-12-22 19:01:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:01:52,333 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 91 [2020-12-22 19:01:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:52,335 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:01:52,335 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 19:01:52,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=612, Invalid=5708, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 19:01:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 19:01:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2020-12-22 19:01:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 19:01:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-12-22 19:01:52,340 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 91 [2020-12-22 19:01:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:52,341 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-12-22 19:01:52,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 19:01:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-12-22 19:01:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 19:01:52,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:52,342 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:52,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:01:52,550 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:52,551 INFO L82 PathProgramCache]: Analyzing trace with hash 180412528, now seen corresponding path program 6 times [2020-12-22 19:01:52,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:52,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283971672] [2020-12-22 19:01:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:01:53,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283971672] [2020-12-22 19:01:53,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930237810] [2020-12-22 19:01:53,007 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 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 19:01:53,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 19:01:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 19:01:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:53,332 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:53,333 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:53,334 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:53,354 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:01:53,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:53,357 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:01:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:01:53,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:53,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2020-12-22 19:01:53,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415326183] [2020-12-22 19:01:53,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:01:53,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:53,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:01:53,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:01:53,942 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 33 states. [2020-12-22 19:01:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:55,344 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-12-22 19:01:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:01:55,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 95 [2020-12-22 19:01:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:55,346 INFO L225 Difference]: With dead ends: 106 [2020-12-22 19:01:55,346 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 19:01:55,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:01:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 19:01:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-22 19:01:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 19:01:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-12-22 19:01:55,349 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-12-22 19:01:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:55,349 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-12-22 19:01:55,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:01:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-12-22 19:01:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 19:01:55,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:55,350 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:55,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:01:55,552 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1082531951, now seen corresponding path program 9 times [2020-12-22 19:01:55,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:55,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193821476] [2020-12-22 19:01:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:01:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193821476] [2020-12-22 19:01:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129867975] [2020-12-22 19:01:56,110 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 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 19:01:56,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 19:01:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-22 19:01:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:56,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:01:56,449 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:56,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:56,459 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:56,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-22 19:01:56,905 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:56,906 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:56,919 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:56,921 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:56,921 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-12-22 19:01:56,996 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 25 treesize of output 24 [2020-12-22 19:01:56,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:57,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:57,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:57,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-12-22 19:01:58,482 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:58,484 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-12-22 19:01:58,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:58,494 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:58,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:58,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:36, output treesize:3 [2020-12-22 19:01:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:01:58,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:58,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 43 [2020-12-22 19:01:58,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67443378] [2020-12-22 19:01:58,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 19:01:58,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 19:01:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:01:58,576 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 43 states. [2020-12-22 19:02:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:01,985 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2020-12-22 19:02:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:02:01,987 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 101 [2020-12-22 19:02:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:01,988 INFO L225 Difference]: With dead ends: 184 [2020-12-22 19:02:01,988 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 19:02:01,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=356, Invalid=3304, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 19:02:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 19:02:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-12-22 19:02:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 19:02:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-12-22 19:02:01,992 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 101 [2020-12-22 19:02:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:01,992 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-12-22 19:02:01,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 19:02:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-12-22 19:02:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 19:02:01,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:01,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:02,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:02,209 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1575339372, now seen corresponding path program 10 times [2020-12-22 19:02:02,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:02,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014514842] [2020-12-22 19:02:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:02:02,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014514842] [2020-12-22 19:02:02,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187791209] [2020-12-22 19:02:02,655 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 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 19:02:02,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:02,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 104 conjunts are in the unsatisfiable core [2020-12-22 19:02:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:02,925 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:02,926 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:02,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:02,951 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:02,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:02,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:03,339 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 15 treesize of output 11 [2020-12-22 19:02:03,340 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:03,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:03,346 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:03,346 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 19:02:03,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 18 [2020-12-22 19:02:03,974 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:03,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:03,992 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:03,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:35 [2020-12-22 19:02:04,183 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:04,205 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:04,206 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2020-12-22 19:02:04,208 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:04,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:04,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:04,225 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:3 [2020-12-22 19:02:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:02:04,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:04,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 40 [2020-12-22 19:02:04,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730812952] [2020-12-22 19:02:04,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 19:02:04,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 19:02:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:02:04,326 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 40 states. [2020-12-22 19:02:11,027 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-22 19:02:11,267 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-12-22 19:02:11,482 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 19:02:11,701 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-12-22 19:02:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:12,004 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2020-12-22 19:02:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 19:02:12,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 105 [2020-12-22 19:02:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:12,006 INFO L225 Difference]: With dead ends: 176 [2020-12-22 19:02:12,006 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 19:02:12,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1141, Invalid=5831, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 19:02:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 19:02:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-12-22 19:02:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 19:02:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-12-22 19:02:12,013 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 105 [2020-12-22 19:02:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:12,013 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-12-22 19:02:12,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 19:02:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-12-22 19:02:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 19:02:12,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:12,014 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:12,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:12,228 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash -813201736, now seen corresponding path program 7 times [2020-12-22 19:02:12,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:12,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29783151] [2020-12-22 19:02:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:02:12,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29783151] [2020-12-22 19:02:12,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521091462] [2020-12-22 19:02:12,720 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 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 19:02:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:12,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 19:02:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:02:13,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:13,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2020-12-22 19:02:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999521341] [2020-12-22 19:02:13,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:02:13,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:02:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:02:13,333 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 30 states. [2020-12-22 19:02:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:14,381 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-12-22 19:02:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:02:14,382 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 19:02:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:14,383 INFO L225 Difference]: With dead ends: 122 [2020-12-22 19:02:14,383 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 19:02:14,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:02:14,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 19:02:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-22 19:02:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 19:02:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-12-22 19:02:14,388 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 111 [2020-12-22 19:02:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:14,388 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-12-22 19:02:14,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:02:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-12-22 19:02:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 19:02:14,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:14,389 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:14,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:02:14,603 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2098417703, now seen corresponding path program 11 times [2020-12-22 19:02:14,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:14,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794261170] [2020-12-22 19:02:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:02:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794261170] [2020-12-22 19:02:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729296140] [2020-12-22 19:02:15,332 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 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 19:02:16,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 19:02:16,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 19:02:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:17,010 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:02:17,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,017 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:17,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:02:17,517 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:02:17,518 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:17,533 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:17,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:02:17,619 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 25 treesize of output 24 [2020-12-22 19:02:17,620 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:17,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:17,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-12-22 19:02:19,043 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:19,046 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:02:19,049 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:19,076 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:02:19,079 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:19,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:02:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:02:19,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:19,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2020-12-22 19:02:19,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265896012] [2020-12-22 19:02:19,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 19:02:19,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 19:02:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:02:19,202 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 42 states. [2020-12-22 19:02:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:22,461 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2020-12-22 19:02:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:02:22,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 117 [2020-12-22 19:02:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:22,463 INFO L225 Difference]: With dead ends: 212 [2020-12-22 19:02:22,464 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 19:02:22,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=285, Invalid=2795, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:02:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 19:02:22,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-12-22 19:02:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 19:02:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-12-22 19:02:22,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2020-12-22 19:02:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:22,468 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-12-22 19:02:22,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 19:02:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-12-22 19:02:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 19:02:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:22,468 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:22,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:22,669 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2037687516, now seen corresponding path program 12 times [2020-12-22 19:02:22,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:22,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89150081] [2020-12-22 19:02:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 19:02:23,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89150081] [2020-12-22 19:02:23,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142712812] [2020-12-22 19:02:23,276 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 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 19:02:24,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 19:02:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 19:02:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:24,710 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 14 treesize of output 10 [2020-12-22 19:02:24,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:24,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:24,724 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:24,724 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:02:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:25,908 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:25,908 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2020-12-22 19:02:25,910 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:25,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:25,919 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:25,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:3 [2020-12-22 19:02:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:02:26,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:26,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 44 [2020-12-22 19:02:26,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281477909] [2020-12-22 19:02:26,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 19:02:26,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 19:02:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:02:26,034 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 44 states. [2020-12-22 19:02:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:33,782 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-12-22 19:02:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 19:02:33,782 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 121 [2020-12-22 19:02:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:33,783 INFO L225 Difference]: With dead ends: 200 [2020-12-22 19:02:33,793 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 19:02:33,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1191, Invalid=7365, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 19:02:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 19:02:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2020-12-22 19:02:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 19:02:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2020-12-22 19:02:33,800 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 121 [2020-12-22 19:02:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:33,800 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2020-12-22 19:02:33,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 19:02:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2020-12-22 19:02:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 19:02:33,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:33,801 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:34,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 19:02:34,005 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash 240761088, now seen corresponding path program 8 times [2020-12-22 19:02:34,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:34,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304442729] [2020-12-22 19:02:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 45 proven. 235 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:02:34,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304442729] [2020-12-22 19:02:34,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297378600] [2020-12-22 19:02:34,564 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 19:02:34,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:34,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 19:02:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:34,741 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:34,741 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:34,743 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:34,764 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:34,770 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:34,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:02:35,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:35,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2020-12-22 19:02:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803181806] [2020-12-22 19:02:35,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 19:02:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 19:02:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:02:35,887 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 41 states. [2020-12-22 19:02:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:37,477 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-22 19:02:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:02:37,478 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 127 [2020-12-22 19:02:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:37,480 INFO L225 Difference]: With dead ends: 138 [2020-12-22 19:02:37,480 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 19:02:37,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=433, Invalid=2219, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:02:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 19:02:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-22 19:02:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 19:02:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-12-22 19:02:37,485 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 127 [2020-12-22 19:02:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:37,485 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-12-22 19:02:37,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 19:02:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-12-22 19:02:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 19:02:37,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:37,486 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:37,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 19:02:37,700 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1265497055, now seen corresponding path program 13 times [2020-12-22 19:02:37,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:37,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770168767] [2020-12-22 19:02:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:02:38,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770168767] [2020-12-22 19:02:38,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866480792] [2020-12-22 19:02:38,559 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 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 19:02:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-22 19:02:38,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:38,740 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:02:38,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:38,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:38,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:38,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:02:39,375 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:02:39,375 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:39,386 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:39,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:39,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:02:39,484 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 25 treesize of output 24 [2020-12-22 19:02:39,485 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:39,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:39,501 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:39,501 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:02:41,248 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:41,248 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:02:41,250 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:41,269 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:02:41,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:41,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:02:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:02:41,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:41,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2020-12-22 19:02:41,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715634154] [2020-12-22 19:02:41,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 19:02:41,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 19:02:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1870, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:02:41,378 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 45 states. [2020-12-22 19:02:47,187 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-22 19:02:51,365 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:02:55,664 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:02:59,994 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:04,352 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:08,692 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:13,056 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:17,407 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:21,777 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:25,998 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:03:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:26,021 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2020-12-22 19:03:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:03:26,022 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-12-22 19:03:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:26,022 INFO L225 Difference]: With dead ends: 240 [2020-12-22 19:03:26,023 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 19:03:26,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=302, Invalid=3238, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:03:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 19:03:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-12-22 19:03:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 19:03:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-12-22 19:03:26,027 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 133 [2020-12-22 19:03:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:26,027 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-12-22 19:03:26,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 19:03:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-12-22 19:03:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 19:03:26,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:26,028 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:26,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:03:26,229 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1083022116, now seen corresponding path program 14 times [2020-12-22 19:03:26,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:26,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26811855] [2020-12-22 19:03:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 66 proven. 286 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:03:27,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26811855] [2020-12-22 19:03:27,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624342884] [2020-12-22 19:03:27,010 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 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 19:03:27,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:03:27,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 19:03:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 19:03:27,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:27,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 34 [2020-12-22 19:03:27,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426362872] [2020-12-22 19:03:27,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:03:27,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:27,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:03:27,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:03:27,871 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 35 states. [2020-12-22 19:03:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:29,635 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-12-22 19:03:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:03:29,636 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2020-12-22 19:03:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:29,637 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:03:29,637 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 19:03:29,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=468, Invalid=1788, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:03:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 19:03:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-12-22 19:03:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 19:03:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-12-22 19:03:29,640 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2020-12-22 19:03:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:29,641 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-12-22 19:03:29,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:03:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-12-22 19:03:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 19:03:29,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:29,641 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:29,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:03:29,842 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1402168133, now seen corresponding path program 9 times [2020-12-22 19:03:29,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:29,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306502494] [2020-12-22 19:03:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:31,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306502494] [2020-12-22 19:03:31,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182229851] [2020-12-22 19:03:31,785 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 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 19:03:33,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 19:03:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 191 conjunts are in the unsatisfiable core [2020-12-22 19:03:33,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:33,966 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 13 treesize of output 9 [2020-12-22 19:03:33,967 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:33,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:33,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:33,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-22 19:03:35,891 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:35,892 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2020-12-22 19:03:35,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:35,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:35,898 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 19:03:35,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2020-12-22 19:03:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:35,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:35,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 41] total 63 [2020-12-22 19:03:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409419026] [2020-12-22 19:03:35,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 19:03:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 19:03:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3711, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 19:03:35,958 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 63 states. [2020-12-22 19:03:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:43,716 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2020-12-22 19:03:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 19:03:43,718 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 139 [2020-12-22 19:03:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:43,719 INFO L225 Difference]: With dead ends: 223 [2020-12-22 19:03:43,719 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 19:03:43,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1868 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=659, Invalid=7713, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 19:03:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 19:03:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2020-12-22 19:03:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 19:03:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2020-12-22 19:03:43,724 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 139 [2020-12-22 19:03:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:43,725 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2020-12-22 19:03:43,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 19:03:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2020-12-22 19:03:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 19:03:43,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:43,726 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:43,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 19:03:43,933 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1923909816, now seen corresponding path program 10 times [2020-12-22 19:03:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:43,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088333005] [2020-12-22 19:03:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 66 proven. 302 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:03:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088333005] [2020-12-22 19:03:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599041946] [2020-12-22 19:03:44,821 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 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 19:03:45,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:03:45,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 19:03:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:45,449 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:45,450 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:03:45,452 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:45,480 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:03:45,483 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:45,483 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:03:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:03:46,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:46,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2020-12-22 19:03:46,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151379193] [2020-12-22 19:03:46,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 19:03:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 19:03:46,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:03:46,901 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 45 states. [2020-12-22 19:03:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:49,853 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-12-22 19:03:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:03:49,854 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 143 [2020-12-22 19:03:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:49,856 INFO L225 Difference]: With dead ends: 154 [2020-12-22 19:03:49,856 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 19:03:49,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=570, Invalid=2852, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 19:03:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 19:03:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-22 19:03:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 19:03:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2020-12-22 19:03:49,862 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 143 [2020-12-22 19:03:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:49,862 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2020-12-22 19:03:49,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 19:03:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2020-12-22 19:03:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 19:03:49,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:49,863 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:50,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:50,078 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash 361100393, now seen corresponding path program 15 times [2020-12-22 19:03:50,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:50,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575423864] [2020-12-22 19:03:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:03:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575423864] [2020-12-22 19:03:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070682561] [2020-12-22 19:03:51,260 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 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 19:03:52,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 19:03:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:52,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 106 conjunts are in the unsatisfiable core [2020-12-22 19:03:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:52,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:03:52,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:52,937 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:52,938 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:52,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:03:53,742 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:03:53,744 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:53,759 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:53,760 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:53,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:03:53,898 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 25 treesize of output 24 [2020-12-22 19:03:53,900 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:53,918 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:53,921 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:53,921 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:03:56,171 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:56,172 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:03:56,174 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:56,198 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:03:56,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:56,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:03:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:03:56,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:56,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2020-12-22 19:03:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879909807] [2020-12-22 19:03:56,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:03:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:03:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2232, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:03:56,333 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 49 states. [2020-12-22 19:04:03,324 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:07,655 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:12,004 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:12,393 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:14,756 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:15,170 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:19,530 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:23,882 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:28,096 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:04:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:28,121 INFO L93 Difference]: Finished difference Result 268 states and 271 transitions. [2020-12-22 19:04:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:04:28,122 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 149 [2020-12-22 19:04:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:28,123 INFO L225 Difference]: With dead ends: 268 [2020-12-22 19:04:28,123 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 19:04:28,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=326, Invalid=3834, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 19:04:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 19:04:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-12-22 19:04:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 19:04:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2020-12-22 19:04:28,128 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2020-12-22 19:04:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:28,128 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2020-12-22 19:04:28,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:04:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2020-12-22 19:04:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 19:04:28,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:28,130 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:28,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:28,331 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 545332588, now seen corresponding path program 16 times [2020-12-22 19:04:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:28,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701916397] [2020-12-22 19:04:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:04:29,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701916397] [2020-12-22 19:04:29,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806466631] [2020-12-22 19:04:29,239 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 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 19:04:29,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:04:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-22 19:04:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:04:30,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:30,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 37 [2020-12-22 19:04:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574175544] [2020-12-22 19:04:30,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:04:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:04:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:04:30,433 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 38 states. [2020-12-22 19:04:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:32,633 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2020-12-22 19:04:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:04:32,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 153 [2020-12-22 19:04:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:32,635 INFO L225 Difference]: With dead ends: 167 [2020-12-22 19:04:32,636 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 19:04:32,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=550, Invalid=2102, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:04:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 19:04:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-12-22 19:04:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 19:04:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2020-12-22 19:04:32,639 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 153 [2020-12-22 19:04:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:32,639 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2020-12-22 19:04:32,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:04:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2020-12-22 19:04:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 19:04:32,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:32,641 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:32,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 19:04:32,855 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:32,856 INFO L82 PathProgramCache]: Analyzing trace with hash 78607245, now seen corresponding path program 11 times [2020-12-22 19:04:32,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:32,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300717007] [2020-12-22 19:04:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:35,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300717007] [2020-12-22 19:04:35,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383842330] [2020-12-22 19:04:35,034 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 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 19:04:36,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 19:04:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 201 conjunts are in the unsatisfiable core [2020-12-22 19:04:36,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:38,326 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 14 treesize of output 10 [2020-12-22 19:04:38,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:38,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:38,337 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:38,337 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17