/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:18:26,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:18:26,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:18:26,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:18:26,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:18:26,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:18:26,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:18:26,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:18:26,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:18:26,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:18:26,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:18:26,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:18:26,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:18:26,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:18:26,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:18:26,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:18:26,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:18:26,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:18:26,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:18:26,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:18:26,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:18:26,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:18:26,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:18:26,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:18:26,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:18:26,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:18:26,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:18:26,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:18:26,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:18:26,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:18:26,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:18:26,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:18:26,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:18:26,816 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:18:26,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:18:26,816 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:18:26,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:18:26,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:18:26,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:18:26,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:18:26,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:18:26,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:18:26,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:18:26,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:18:26,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:18:26,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:18:26,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:18:26,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:18:26,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:18:26,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:18:26,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:18:26,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:18:26,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:18:26,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:18:26,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:18:26,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:18:26,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:18:26,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:18:26,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:18:27,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:18:27,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:18:27,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:18:27,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:18:27,297 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:18:27,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-10-23 18:18:27,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d96beaa/5d0196151ae945bb84a8582c6dca28c5/FLAG55f83c88a [2020-10-23 18:18:27,968 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:18:27,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-10-23 18:18:27,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d96beaa/5d0196151ae945bb84a8582c6dca28c5/FLAG55f83c88a [2020-10-23 18:18:28,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d96beaa/5d0196151ae945bb84a8582c6dca28c5 [2020-10-23 18:18:28,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:18:28,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:18:28,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:18:28,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:18:28,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:18:28,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4ac219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28, skipping insertion in model container [2020-10-23 18:18:28,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:18:28,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:18:28,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:18:28,561 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:18:28,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:18:28,601 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:18:28,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28 WrapperNode [2020-10-23 18:18:28,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:18:28,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:18:28,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:18:28,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:18:28,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (1/1) ... [2020-10-23 18:18:28,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:18:28,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:18:28,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:18:28,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:18:28,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (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 [2020-10-23 18:18:28,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:18:28,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:18:28,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:18:28,753 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 18:18:28,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:18:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:18:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:18:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:18:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:18:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 18:18:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:18:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:18:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:18:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:18:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:18:28,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:18:28,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:18:29,258 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:18:29,258 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:18:29,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:29 BoogieIcfgContainer [2020-10-23 18:18:29,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:18:29,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:18:29,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:18:29,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:18:29,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:18:28" (1/3) ... [2020-10-23 18:18:29,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d5a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:29, skipping insertion in model container [2020-10-23 18:18:29,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:28" (2/3) ... [2020-10-23 18:18:29,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d5a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:29, skipping insertion in model container [2020-10-23 18:18:29,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:29" (3/3) ... [2020-10-23 18:18:29,272 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-10-23 18:18:29,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:18:29,290 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:18:29,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:18:29,358 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:18:29,358 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:18:29,359 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:18:29,359 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:18:29,359 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:18:29,359 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:18:29,359 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:18:29,359 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:18:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:18:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:18:29,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:29,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:29,395 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-10-23 18:18:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:29,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138745304] [2020-10-23 18:18:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:18:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138745304] [2020-10-23 18:18:29,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:18:29,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:18:29,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836626422] [2020-10-23 18:18:29,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:18:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:29,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:18:29,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:18:29,808 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:18:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:30,277 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:18:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:18:30,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:18:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:30,289 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:18:30,289 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:18:30,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:18:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:18:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:18:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:18:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:18:30,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:18:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:30,340 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:18:30,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:18:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:18:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:18:30,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:30,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:30,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:18:30,343 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-10-23 18:18:30,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:30,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294151354] [2020-10-23 18:18:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:18:30,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294151354] [2020-10-23 18:18:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007206081] [2020-10-23 18:18:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-23 18:18:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:18:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:18:30,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:30,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:18:30,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685065344] [2020-10-23 18:18:30,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:18:30,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:18:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:18:30,766 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-23 18:18:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:31,135 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:18:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:18:31,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-23 18:18:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:31,137 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:18:31,137 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:18:31,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:18:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:18:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:18:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:18:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:18:31,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:18:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:31,148 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:18:31,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:18:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:18:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:18:31,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:31,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:31,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:18:31,366 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-10-23 18:18:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:31,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771991254] [2020-10-23 18:18:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:31,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:31,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:18:31,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771991254] [2020-10-23 18:18:31,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814718173] [2020-10-23 18:18:31,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:31,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:18:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:18:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:18:31,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:31,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2020-10-23 18:18:31,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250028174] [2020-10-23 18:18:31,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:18:31,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:18:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:18:31,815 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 16 states. [2020-10-23 18:18:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:32,280 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:18:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:18:32,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-23 18:18:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:32,282 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:18:32,282 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:18:32,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:18:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:18:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:18:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:18:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:18:32,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:18:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:32,292 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:18:32,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:18:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:18:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:18:32,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:32,294 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:32,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:32,507 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-10-23 18:18:32,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:32,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797463713] [2020-10-23 18:18:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:32,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:32,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:32,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:32,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:32,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:18:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797463713] [2020-10-23 18:18:32,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860261696] [2020-10-23 18:18:32,732 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 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 [2020-10-23 18:18:32,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:18:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:18:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:18:32,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:32,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:18:32,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144416939] [2020-10-23 18:18:32,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:18:32,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:32,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:18:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:18:32,874 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-23 18:18:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:33,225 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:18:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:18:33,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-23 18:18:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:33,227 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:18:33,227 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:18:33,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:18:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:18:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:18:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:18:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:18:33,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:18:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:33,241 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:18:33,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:18:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:18:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:18:33,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:33,243 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:33,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:33,456 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-10-23 18:18:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:33,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249052056] [2020-10-23 18:18:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:18:33,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249052056] [2020-10-23 18:18:33,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663646141] [2020-10-23 18:18:33,675 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 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 [2020-10-23 18:18:33,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:18:33,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:18:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:18:33,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:33,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:18:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371673189] [2020-10-23 18:18:33,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:18:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:18:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:18:33,790 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-23 18:18:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:34,170 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:18:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:18:34,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:18:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:34,172 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:18:34,172 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:18:34,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:18:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:18:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:18:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:18:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:18:34,181 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:18:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:34,181 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:18:34,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:18:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:18:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:18:34,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:34,183 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:34,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:34,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-10-23 18:18:34,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:34,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161176789] [2020-10-23 18:18:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:18:34,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161176789] [2020-10-23 18:18:34,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921620210] [2020-10-23 18:18:34,671 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 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 [2020-10-23 18:18:34,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:18:34,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:18:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:18:34,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:34,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:18:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696221497] [2020-10-23 18:18:34,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:18:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:18:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:18:34,789 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-23 18:18:35,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:35,218 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:18:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:18:35,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-23 18:18:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:35,220 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:18:35,220 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:18:35,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:18:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:18:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:18:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:18:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:18:35,233 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:18:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:35,234 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:18:35,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:18:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:18:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:18:35,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:35,236 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:35,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:18:35,450 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-10-23 18:18:35,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:35,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436162395] [2020-10-23 18:18:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:18:35,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436162395] [2020-10-23 18:18:35,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481776095] [2020-10-23 18:18:35,766 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 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 [2020-10-23 18:18:35,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:18:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:18:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:18:35,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:35,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:18:35,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891761712] [2020-10-23 18:18:35,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:18:35,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:35,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:18:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:18:35,928 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-23 18:18:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:36,443 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:18:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:18:36,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-23 18:18:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:36,445 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:18:36,446 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:18:36,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:18:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:18:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:18:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:18:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:18:36,455 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:18:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:36,455 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:18:36,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:18:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:18:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:18:36,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:36,457 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:36,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:36,664 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-10-23 18:18:36,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:36,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141531641] [2020-10-23 18:18:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:18:37,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141531641] [2020-10-23 18:18:37,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418082237] [2020-10-23 18:18:37,012 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 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 [2020-10-23 18:18:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:18:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:18:37,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:37,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-23 18:18:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843373712] [2020-10-23 18:18:37,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:18:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:18:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:18:37,163 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-23 18:18:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:37,675 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:18:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:18:37,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-23 18:18:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:37,679 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:18:37,679 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:18:37,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:18:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:18:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:18:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:18:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:18:37,696 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:18:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:37,697 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:18:37,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:18:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:18:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:18:37,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:37,700 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:37,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:37,914 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:37,915 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-10-23 18:18:37,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:37,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480567765] [2020-10-23 18:18:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:37,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:37,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:18:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480567765] [2020-10-23 18:18:38,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981693887] [2020-10-23 18:18:38,289 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 [2020-10-23 18:18:38,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:18:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:18:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:18:38,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:38,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-10-23 18:18:38,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244624047] [2020-10-23 18:18:38,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:18:38,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:18:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:18:38,458 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-23 18:18:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:39,029 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:18:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:18:39,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-23 18:18:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:39,032 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:18:39,032 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:18:39,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:18:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:18:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:18:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:18:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:18:39,040 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:18:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:39,041 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:18:39,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:18:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:18:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:18:39,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:39,042 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:39,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:18:39,251 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-10-23 18:18:39,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:39,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423582123] [2020-10-23 18:18:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:18:39,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423582123] [2020-10-23 18:18:39,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545160626] [2020-10-23 18:18:39,646 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 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 [2020-10-23 18:18:39,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:18:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-23 18:18:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:18:40,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:40,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 37 [2020-10-23 18:18:40,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370044549] [2020-10-23 18:18:40,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 18:18:40,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:40,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 18:18:40,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:18:40,419 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 37 states. [2020-10-23 18:18:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:41,970 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:18:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:18:41,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2020-10-23 18:18:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:41,973 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:18:41,973 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:18:41,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=603, Invalid=2703, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:18:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:18:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:18:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:18:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:18:41,983 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:18:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:41,983 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:18:41,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 18:18:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:18:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:18:41,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:41,985 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:42,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:42,200 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-10-23 18:18:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126839009] [2020-10-23 18:18:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:18:42,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126839009] [2020-10-23 18:18:42,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060594954] [2020-10-23 18:18:42,672 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 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 [2020-10-23 18:18:42,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:18:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:42,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:18:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:18:42,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:42,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-10-23 18:18:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761326982] [2020-10-23 18:18:42,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:18:42,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:18:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:18:42,903 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2020-10-23 18:18:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:43,579 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:18:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:18:43,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-23 18:18:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:43,582 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:18:43,582 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:18:43,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:18:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:18:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:18:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:18:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:18:43,590 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:18:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:43,591 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:18:43,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:18:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:18:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:18:43,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:43,592 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:43,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:43,807 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:43,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1422056319, now seen corresponding path program 11 times [2020-10-23 18:18:43,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:43,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548524561] [2020-10-23 18:18:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:18:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548524561] [2020-10-23 18:18:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134122212] [2020-10-23 18:18:44,345 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 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 [2020-10-23 18:18:44,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:18:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:18:44,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:18:44,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:44,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-10-23 18:18:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179891970] [2020-10-23 18:18:44,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:18:44,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:18:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:18:44,486 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2020-10-23 18:18:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:45,237 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:18:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:18:45,237 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-23 18:18:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:45,238 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:18:45,238 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:18:45,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:18:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:18:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:18:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:18:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:18:45,254 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:18:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:45,255 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:18:45,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:18:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:18:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:18:45,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:45,261 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:45,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:18:45,478 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:45,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash -550588569, now seen corresponding path program 12 times [2020-10-23 18:18:45,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:45,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094573381] [2020-10-23 18:18:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:18:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094573381] [2020-10-23 18:18:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093690869] [2020-10-23 18:18:45,955 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 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 [2020-10-23 18:18:46,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:18:46,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:18:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:18:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-10-23 18:18:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025195628] [2020-10-23 18:18:46,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:18:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:18:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:18:46,120 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2020-10-23 18:18:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:46,894 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:18:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:18:46,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-23 18:18:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:46,896 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:18:46,897 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:18:46,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:18:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:18:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:18:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:18:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:18:46,904 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:18:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:46,905 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:18:46,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:18:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:18:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:18:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:46,907 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:47,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:18:47,120 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 953297599, now seen corresponding path program 13 times [2020-10-23 18:18:47,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:47,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786255607] [2020-10-23 18:18:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:18:47,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786255607] [2020-10-23 18:18:47,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943925374] [2020-10-23 18:18:47,683 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 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 [2020-10-23 18:18:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:18:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:18:47,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:47,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-10-23 18:18:47,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255860718] [2020-10-23 18:18:47,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:18:47,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:18:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:18:47,858 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2020-10-23 18:18:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:48,718 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:18:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:18:48,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-23 18:18:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:48,720 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:18:48,720 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:18:48,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:18:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:18:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:18:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:18:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:18:48,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:18:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:48,730 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:18:48,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:18:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:18:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:18:48,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:48,732 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:48,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:18:48,946 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:48,947 INFO L82 PathProgramCache]: Analyzing trace with hash -929015641, now seen corresponding path program 14 times [2020-10-23 18:18:48,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:48,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660509310] [2020-10-23 18:18:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:18:49,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660509310] [2020-10-23 18:18:49,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374290693] [2020-10-23 18:18:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:49,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:18:49,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:18:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:18:49,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:49,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-10-23 18:18:49,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584661307] [2020-10-23 18:18:49,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:18:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:18:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:18:49,731 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-10-23 18:18:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:50,576 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:18:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:18:50,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-23 18:18:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:50,578 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:18:50,578 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:18:50,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:18:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:18:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:18:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:18:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:18:50,592 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:18:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:50,593 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:18:50,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:18:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:18:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:18:50,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:50,597 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:50,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:50,813 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -386344449, now seen corresponding path program 15 times [2020-10-23 18:18:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:50,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988031671] [2020-10-23 18:18:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:18:50,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:18:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:18:50,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:18:50,916 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:18:50,916 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:18:50,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:18:50,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:18:50 BoogieIcfgContainer [2020-10-23 18:18:50,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:18:50,978 INFO L168 Benchmark]: Toolchain (without parser) took 22621.69 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.5 MB in the beginning and 337.4 MB in the end (delta: -210.9 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:50,979 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:18:50,979 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:50,980 INFO L168 Benchmark]: Boogie Preprocessor took 57.32 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:50,980 INFO L168 Benchmark]: RCFGBuilder took 596.48 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 102.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:50,981 INFO L168 Benchmark]: TraceAbstraction took 21712.47 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 102.4 MB in the beginning and 337.4 MB in the end (delta: -235.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:18:50,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.32 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 596.48 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 102.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21712.47 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 102.4 MB in the beginning and 337.4 MB in the end (delta: -235.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 15; [L15] int b = 0; VAL [a=15, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=15, b=0, sum(a, b)=15] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b VAL [a=15, b=0, result=15] [L18] CALL reach_error() [L3] __assert_fail("0", "sum_15x0-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.5s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 196 SDtfs, 766 SDslu, 464 SDs, 0 SdLazy, 1308 SolverSat, 500 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1422 GetRequests, 1054 SyntacticMatches, 0 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 1800 NumberOfCodeBlocks, 1800 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1666 ConstructedInterpolants, 0 QuantifiedInterpolants, 309260 SizeOfPredicates, 139 NumberOfNonLiveVariables, 3332 ConjunctsInSsa, 296 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...