/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 0.2.0-7d8eed3 [2020-11-06 22:21:35,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:21:35,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:21:35,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:21:35,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:21:35,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:21:35,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:21:35,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:21:35,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:21:35,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:21:35,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:21:35,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:21:35,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:21:35,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:21:35,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:21:35,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:21:35,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:21:35,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:21:35,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:21:35,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:21:35,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:21:35,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:21:35,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:21:35,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:21:35,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:21:35,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:21:35,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:21:35,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:21:35,657 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 [2020-11-06 22:21:35,711 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:21:35,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:21:35,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:21:35,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:21:35,715 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:21:35,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:21:35,716 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:21:35,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:21:35,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:21:35,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:21:35,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:21:35,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:21:35,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:21:35,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:21:35,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:21:35,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:21:35,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:21:35,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:21:35,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:21:35,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:21:35,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:21:35,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:21:35,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:21:35,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:21:35,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:21:35,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:21:35,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:21:35,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:21:35,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:21:35,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:21:36,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:21:36,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:21:36,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:21:36,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:21:36,294 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:21:36,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-11-06 22:21:36,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782c97ec7/d6ce38dcfd11482fa3caa7b22e2f49df/FLAG5ad558f9f [2020-11-06 22:21:37,091 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:21:37,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-11-06 22:21:37,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782c97ec7/d6ce38dcfd11482fa3caa7b22e2f49df/FLAG5ad558f9f [2020-11-06 22:21:37,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782c97ec7/d6ce38dcfd11482fa3caa7b22e2f49df [2020-11-06 22:21:37,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:21:37,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:21:37,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:21:37,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:21:37,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:21:37,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723f04c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37, skipping insertion in model container [2020-11-06 22:21:37,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:21:37,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:21:37,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:21:37,648 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:21:37,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:21:37,679 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:21:37,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37 WrapperNode [2020-11-06 22:21:37,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:21:37,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:21:37,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:21:37,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:21:37,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (1/1) ... [2020-11-06 22:21:37,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:21:37,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:21:37,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:21:37,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:21:37,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (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 [2020-11-06 22:21:37,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:21:37,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:21:37,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:21:37,864 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-06 22:21:37,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:21:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:21:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:21:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:21:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:21:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-06 22:21:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:21:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:21:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:21:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:21:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:21:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:21:37,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:21:38,102 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:21:38,103 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:21:38,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38 BoogieIcfgContainer [2020-11-06 22:21:38,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:21:38,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:21:38,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:21:38,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:21:38,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:37" (1/3) ... [2020-11-06 22:21:38,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4406ebfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:38, skipping insertion in model container [2020-11-06 22:21:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:37" (2/3) ... [2020-11-06 22:21:38,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4406ebfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:38, skipping insertion in model container [2020-11-06 22:21:38,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38" (3/3) ... [2020-11-06 22:21:38,115 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-11-06 22:21:38,131 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:21:38,135 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:21:38,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:21:38,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:21:38,176 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:21:38,177 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:21:38,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:21:38,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:21:38,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:21:38,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:21:38,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:21:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:21:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:21:38,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:38,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:38,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:38,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-11-06 22:21:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:38,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712548600] [2020-11-06 22:21:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:38,660 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-06 22:21:38,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:38,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:21:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712548600] [2020-11-06 22:21:38,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:21:38,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:21:38,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518712754] [2020-11-06 22:21:38,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:21:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:21:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:21:38,776 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-11-06 22:21:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:39,052 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-06 22:21:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:21:39,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:21:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:39,065 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:21:39,065 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:21:39,069 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 [2020-11-06 22:21:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:21:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:21:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:21:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:21:39,125 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:21:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:39,125 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:21:39,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:21:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:21:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:21:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:39,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:39,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:21:39,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-11-06 22:21:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:39,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160036903] [2020-11-06 22:21:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:39,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:39,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:39,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:21:39,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160036903] [2020-11-06 22:21:39,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35960327] [2020-11-06 22:21:39,294 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 [2020-11-06 22:21:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:39,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:21:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:21:39,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:39,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:21:39,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628578419] [2020-11-06 22:21:39,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:21:39,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:21:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:21:39,466 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-11-06 22:21:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:39,776 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-06 22:21:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:21:39,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-06 22:21:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:39,778 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:21:39,778 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:21:39,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:21:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:21:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:21:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:21:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:21:39,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-11-06 22:21:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:39,789 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:21:39,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:21:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:21:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:21:39,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:39,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:39,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:21:40,000 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-11-06 22:21:40,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:40,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202410408] [2020-11-06 22:21:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:40,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:40,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:40,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:21:40,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202410408] [2020-11-06 22:21:40,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188138086] [2020-11-06 22:21:40,271 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 [2020-11-06 22:21:40,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:21:40,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:21:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:21:40,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:40,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2020-11-06 22:21:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063186237] [2020-11-06 22:21:40,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:21:40,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:21:40,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:21:40,506 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 16 states. [2020-11-06 22:21:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:40,924 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-06 22:21:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:21:40,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-11-06 22:21:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:40,926 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:21:40,926 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:21:40,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:21:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:21:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:21:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:21:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:21:40,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-11-06 22:21:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:40,936 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:21:40,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:21:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:21:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:21:40,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:40,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:41,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:41,153 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-11-06 22:21:41,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:41,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680486568] [2020-11-06 22:21:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:41,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:41,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:41,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:41,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:21:41,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680486568] [2020-11-06 22:21:41,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114103549] [2020-11-06 22:21:41,452 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 [2020-11-06 22:21:41,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:21:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:21:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:21:41,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:41,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-06 22:21:41,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854297357] [2020-11-06 22:21:41,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:21:41,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:21:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:21:41,580 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-11-06 22:21:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:41,935 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-06 22:21:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:21:41,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-11-06 22:21:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:41,939 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:21:41,939 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:21:41,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:21:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:21:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-06 22:21:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:21:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-06 22:21:41,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-11-06 22:21:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:41,948 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-06 22:21:41,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:21:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-06 22:21:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:21:41,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:41,950 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:42,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:42,164 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-11-06 22:21:42,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:42,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76289250] [2020-11-06 22:21:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:21:42,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76289250] [2020-11-06 22:21:42,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346945874] [2020-11-06 22:21:42,363 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 [2020-11-06 22:21:42,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:21:42,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:42,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:21:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:21:42,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:42,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-06 22:21:42,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822524186] [2020-11-06 22:21:42,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:21:42,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:21:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:21:42,502 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-11-06 22:21:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:42,958 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-06 22:21:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:21:42,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-11-06 22:21:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:42,960 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:21:42,960 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:21:42,964 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 [2020-11-06 22:21:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:21:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:21:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:21:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-06 22:21:42,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-11-06 22:21:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:42,980 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-06 22:21:42,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:21:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-06 22:21:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:21:42,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:42,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:43,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:43,186 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:43,187 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-11-06 22:21:43,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:43,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644938893] [2020-11-06 22:21:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:21:43,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644938893] [2020-11-06 22:21:43,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131273929] [2020-11-06 22:21:43,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-06 22:21:43,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-06 22:21:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:43,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:21:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:21:43,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:43,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-06 22:21:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245182646] [2020-11-06 22:21:43,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:21:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:21:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:21:43,529 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-11-06 22:21:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:44,033 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-06 22:21:44,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:21:44,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-11-06 22:21:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:44,035 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:21:44,035 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:21:44,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:21:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:21:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-06 22:21:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:21:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-06 22:21:44,045 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-11-06 22:21:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:44,045 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-06 22:21:44,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:21:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-06 22:21:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-06 22:21:44,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:44,047 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:44,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:21:44,261 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-11-06 22:21:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231420597] [2020-11-06 22:21:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:21:44,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231420597] [2020-11-06 22:21:44,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530564581] [2020-11-06 22:21:44,507 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 [2020-11-06 22:21:44,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-06 22:21:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:21:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:21:44,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:44,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:21:44,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546891490] [2020-11-06 22:21:44,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:21:44,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:21:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:21:44,667 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-11-06 22:21:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:45,180 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-06 22:21:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:21:45,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-11-06 22:21:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:45,182 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:21:45,183 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:21:45,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:21:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:21:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:21:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:21:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:21:45,200 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-11-06 22:21:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:45,201 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:21:45,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:21:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:21:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:21:45,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:45,203 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:45,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:45,422 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-11-06 22:21:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:45,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092105690] [2020-11-06 22:21:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-06 22:21:45,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092105690] [2020-11-06 22:21:45,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682550048] [2020-11-06 22:21:45,694 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 [2020-11-06 22:21:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:21:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-06 22:21:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-06 22:21:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291252958] [2020-11-06 22:21:45,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:21:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:21:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:21:45,820 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-11-06 22:21:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:46,324 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-06 22:21:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:21:46,325 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-11-06 22:21:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:46,327 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:21:46,327 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:21:46,328 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 [2020-11-06 22:21:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:21:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:21:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:21:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-11-06 22:21:46,337 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-11-06 22:21:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:46,337 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-11-06 22:21:46,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:21:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-11-06 22:21:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-06 22:21:46,339 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:46,339 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:46,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:46,546 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-11-06 22:21:46,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:46,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446758051] [2020-11-06 22:21:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-06 22:21:46,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446758051] [2020-11-06 22:21:46,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985010655] [2020-11-06 22:21:46,924 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 [2020-11-06 22:21:47,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:21:47,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:47,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-06 22:21:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-06 22:21:47,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:47,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-11-06 22:21:47,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683464398] [2020-11-06 22:21:47,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:21:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:21:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:21:47,166 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-11-06 22:21:47,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:47,774 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-06 22:21:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:21:47,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-11-06 22:21:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:47,777 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:21:47,778 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:21:47,779 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 [2020-11-06 22:21:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:21:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-06 22:21:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:21:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-06 22:21:47,793 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-11-06 22:21:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:47,793 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-06 22:21:47,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:21:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-06 22:21:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-06 22:21:47,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:47,799 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:47,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:21:48,000 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-11-06 22:21:48,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:48,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029671909] [2020-11-06 22:21:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:21:48,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029671909] [2020-11-06 22:21:48,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302842506] [2020-11-06 22:21:48,393 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 [2020-11-06 22:21:48,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-06 22:21:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-06 22:21:48,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:21:49,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:49,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 37 [2020-11-06 22:21:49,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441329248] [2020-11-06 22:21:49,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-06 22:21:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-06 22:21:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2020-11-06 22:21:49,239 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 37 states. [2020-11-06 22:21:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:50,896 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-06 22:21:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:21:50,897 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2020-11-06 22:21:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:50,899 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:21:50,899 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:21:50,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=603, Invalid=2703, Unknown=0, NotChecked=0, Total=3306 [2020-11-06 22:21:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:21:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-06 22:21:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:21:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-06 22:21:50,914 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-11-06 22:21:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:50,915 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-06 22:21:50,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-06 22:21:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-06 22:21:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-06 22:21:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:50,917 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:51,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:51,118 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-11-06 22:21:51,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:51,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338460934] [2020-11-06 22:21:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-06 22:21:51,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338460934] [2020-11-06 22:21:51,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112128655] [2020-11-06 22:21:51,595 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 [2020-11-06 22:21:51,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:21:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-06 22:21:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-06 22:21:51,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:51,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-11-06 22:21:51,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042656772] [2020-11-06 22:21:51,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:21:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:21:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:21:51,760 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2020-11-06 22:21:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:52,500 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-06 22:21:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:21:52,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-11-06 22:21:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:52,502 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:21:52,502 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:21:52,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:21:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:21:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-06 22:21:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:21:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-11-06 22:21:52,511 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-11-06 22:21:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:52,511 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-11-06 22:21:52,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:21:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-11-06 22:21:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:21:52,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:52,513 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:52,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:52,728 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1422056319, now seen corresponding path program 11 times [2020-11-06 22:21:52,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:52,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338545261] [2020-11-06 22:21:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:52,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:52,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:52,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:52,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:52,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-06 22:21:53,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338545261] [2020-11-06 22:21:53,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118276729] [2020-11-06 22:21:53,335 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 [2020-11-06 22:21:53,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-06 22:21:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-06 22:21:53,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-06 22:21:53,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:53,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-11-06 22:21:53,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440705949] [2020-11-06 22:21:53,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:21:53,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:21:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:21:53,538 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2020-11-06 22:21:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:54,312 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-06 22:21:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:21:54,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-11-06 22:21:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:54,313 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:21:54,314 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:21:54,315 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 [2020-11-06 22:21:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:21:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-06 22:21:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:21:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-11-06 22:21:54,323 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-11-06 22:21:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:54,323 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-11-06 22:21:54,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:21:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-11-06 22:21:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-06 22:21:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:54,325 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:54,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-06 22:21:54,538 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash -550588569, now seen corresponding path program 12 times [2020-11-06 22:21:54,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:54,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570883465] [2020-11-06 22:21:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:54,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:55,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:55,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-06 22:21:55,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570883465] [2020-11-06 22:21:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20735222] [2020-11-06 22:21:55,093 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 [2020-11-06 22:21:55,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-06 22:21:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-06 22:21:55,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-06 22:21:55,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:55,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-11-06 22:21:55,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795178943] [2020-11-06 22:21:55,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:21:55,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:55,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:21:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:21:55,294 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2020-11-06 22:21:56,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:56,119 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-06 22:21:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 22:21:56,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-11-06 22:21:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:56,121 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:21:56,122 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:21:56,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2020-11-06 22:21:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:21:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-06 22:21:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:21:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-11-06 22:21:56,130 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-11-06 22:21:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:56,131 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-11-06 22:21:56,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:21:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-11-06 22:21:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-06 22:21:56,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:56,133 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:56,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-06 22:21:56,335 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:56,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash 953297599, now seen corresponding path program 13 times [2020-11-06 22:21:56,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:56,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389162625] [2020-11-06 22:21:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-06 22:21:56,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389162625] [2020-11-06 22:21:56,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207823031] [2020-11-06 22:21:56,923 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 [2020-11-06 22:21:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:57,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-06 22:21:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-06 22:21:57,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:57,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-11-06 22:21:57,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557938324] [2020-11-06 22:21:57,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-06 22:21:57,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-06 22:21:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:21:57,123 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2020-11-06 22:21:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:57,991 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-06 22:21:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:21:57,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-11-06 22:21:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:57,993 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:21:57,993 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:21:57,995 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 [2020-11-06 22:21:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:21:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-06 22:21:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:21:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-11-06 22:21:58,003 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-11-06 22:21:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:58,003 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-11-06 22:21:58,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-06 22:21:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-11-06 22:21:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-06 22:21:58,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:58,005 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:58,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-06 22:21:58,220 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash -929015641, now seen corresponding path program 14 times [2020-11-06 22:21:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:58,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158054145] [2020-11-06 22:21:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-06 22:21:58,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158054145] [2020-11-06 22:21:58,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721633028] [2020-11-06 22:21:58,880 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 [2020-11-06 22:21:58,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:21:58,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:58,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-06 22:21:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-06 22:21:59,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:59,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-11-06 22:21:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10547714] [2020-11-06 22:21:59,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:21:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:21:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:21:59,039 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-11-06 22:21:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:59,943 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-06 22:21:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 22:21:59,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-11-06 22:21:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:59,946 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:21:59,947 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:21:59,948 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 [2020-11-06 22:21:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:21:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-06 22:21:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-06 22:21:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-11-06 22:21:59,955 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-11-06 22:21:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:59,955 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-11-06 22:21:59,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:21:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-11-06 22:21:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-06 22:21:59,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:59,961 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:22:00,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:22:00,175 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:22:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:22:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -386344449, now seen corresponding path program 15 times [2020-11-06 22:22:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:22:00,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964019317] [2020-11-06 22:22:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:22:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:22:00,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:22:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:22:00,241 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:22:00,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:22:00,281 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:22:00,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-06 22:22:00,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:22:00 BoogieIcfgContainer [2020-11-06 22:22:00,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:22:00,391 INFO L168 Benchmark]: Toolchain (without parser) took 22938.24 ms. Allocated memory was 164.6 MB in the beginning and 423.6 MB in the end (delta: 259.0 MB). Free memory was 145.0 MB in the beginning and 323.1 MB in the end (delta: -178.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:22:00,391 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 164.6 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:22:00,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.00 ms. Allocated memory is still 164.6 MB. Free memory was 144.2 MB in the beginning and 135.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:22:00,394 INFO L168 Benchmark]: Boogie Preprocessor took 32.38 ms. Allocated memory is still 164.6 MB. Free memory was 135.3 MB in the beginning and 133.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:22:00,395 INFO L168 Benchmark]: RCFGBuilder took 390.76 ms. Allocated memory is still 164.6 MB. Free memory was 133.9 MB in the beginning and 136.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:22:00,395 INFO L168 Benchmark]: TraceAbstraction took 22282.72 ms. Allocated memory was 164.6 MB in the beginning and 423.6 MB in the end (delta: 259.0 MB). Free memory was 135.6 MB in the beginning and 323.1 MB in the end (delta: -187.5 MB). Peak memory consumption was 71.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:22:00,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 164.6 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 221.00 ms. Allocated memory is still 164.6 MB. Free memory was 144.2 MB in the beginning and 135.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.38 ms. Allocated memory is still 164.6 MB. Free memory was 135.3 MB in the beginning and 133.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.76 ms. Allocated memory is still 164.6 MB. Free memory was 133.9 MB in the beginning and 136.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22282.72 ms. Allocated memory was 164.6 MB in the beginning and 423.6 MB in the end (delta: 259.0 MB). Free memory was 135.6 MB in the beginning and 323.1 MB in the end (delta: -187.5 MB). Peak memory consumption was 71.9 MB. 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: 22.1s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 9.8s, 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, 9.9s 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, 7.2s 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...