/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/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:14:26,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:14:26,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:14:26,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:14:26,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:14:26,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:14:26,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:14:26,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:14:26,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:14:26,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:14:26,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:14:26,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:14:26,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:14:26,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:14:26,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:14:26,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:14:26,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:14:26,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:14:26,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:14:26,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:14:26,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:14:26,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:14:26,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:14:26,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:14:26,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:14:26,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:14:26,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:14:26,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:14:26,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:14:26,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:14:26,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:14:26,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:14:26,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:14:26,764 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:14:26,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:14:26,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:14:26,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:14:26,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:14:26,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:14:26,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:14:26,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:14:26,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:14:26,768 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:14:26,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:14:26,768 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:14:26,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:14:26,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:14:26,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:14:26,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:14:26,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:14:26,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:14:26,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:14:26,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:14:26,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:14:26,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:14:26,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:14:26,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:14:26,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:14:26,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:14:27,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:14:27,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:14:27,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:14:27,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:14:27,218 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:14:27,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-10-23 18:14:27,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5f28729/eed32b74a8c440fcb45b56bc8bad6ad9/FLAG19d75402b [2020-10-23 18:14:28,108 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:14:28,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-10-23 18:14:28,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5f28729/eed32b74a8c440fcb45b56bc8bad6ad9/FLAG19d75402b [2020-10-23 18:14:28,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5f28729/eed32b74a8c440fcb45b56bc8bad6ad9 [2020-10-23 18:14:28,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:14:28,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:14:28,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:14:28,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:14:28,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:14:28,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d8a0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28, skipping insertion in model container [2020-10-23 18:14:28,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:14:28,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:14:28,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:14:28,712 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:14:28,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:14:28,750 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:14:28,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28 WrapperNode [2020-10-23 18:14:28,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:14:28,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:14:28,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:14:28,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:14:28,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... [2020-10-23 18:14:28,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:14:28,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:14:28,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:14:28,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:14:28,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:14:28,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:14:28,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:14:28,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:14:28,887 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 18:14:28,887 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 18:14:28,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:14:28,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:14:28,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:14:28,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:14:28,888 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:14:28,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:14:28,888 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 18:14:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 18:14:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:14:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:14:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:14:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:14:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:14:28,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:14:28,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:14:29,495 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:14:29,495 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:14:29,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:14:29 BoogieIcfgContainer [2020-10-23 18:14:29,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:14:29,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:14:29,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:14:29,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:14:29,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:14:28" (1/3) ... [2020-10-23 18:14:29,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59173de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:14:29, skipping insertion in model container [2020-10-23 18:14:29,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:28" (2/3) ... [2020-10-23 18:14:29,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59173de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:14:29, skipping insertion in model container [2020-10-23 18:14:29,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:14:29" (3/3) ... [2020-10-23 18:14:29,515 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-10-23 18:14:29,532 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:14:29,556 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:14:29,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:14:29,627 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:14:29,627 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:14:29,627 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:14:29,627 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:14:29,627 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:14:29,628 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:14:29,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:14:29,628 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:14:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:14:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:14:29,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:29,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:29,670 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 219823047, now seen corresponding path program 1 times [2020-10-23 18:14:29,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:29,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982579480] [2020-10-23 18:14:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:14:30,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982579480] [2020-10-23 18:14:30,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:14:30,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:14:30,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034689561] [2020-10-23 18:14:30,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:14:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:14:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:14:30,127 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-23 18:14:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:30,525 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-23 18:14:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:14:30,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:14:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:30,539 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:14:30,540 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:14:30,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:14:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:14:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:14:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:14:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:14:30,606 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-10-23 18:14:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:30,607 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:14:30,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:14:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:14:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:14:30,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:30,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:30,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:14:30,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:30,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1220716726, now seen corresponding path program 1 times [2020-10-23 18:14:30,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:30,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029643400] [2020-10-23 18:14:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:14:30,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029643400] [2020-10-23 18:14:30,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:14:30,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:14:30,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941245229] [2020-10-23 18:14:30,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:14:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:14:30,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:14:30,757 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-23 18:14:31,049 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:14:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:31,171 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-23 18:14:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:14:31,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:14:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:31,174 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:14:31,174 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:14:31,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:14:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:14:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:14:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:14:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:14:31,189 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2020-10-23 18:14:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:31,190 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:14:31,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:14:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:14:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:14:31,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:31,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:31,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:14:31,192 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2083135015, now seen corresponding path program 1 times [2020-10-23 18:14:31,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:31,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389938852] [2020-10-23 18:14:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:31,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:31,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:31,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:31,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:14:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:31,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389938852] [2020-10-23 18:14:31,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595734558] [2020-10-23 18:14:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:14:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:31,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:31,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-23 18:14:31,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639937553] [2020-10-23 18:14:31,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:14:31,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:14:31,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:14:31,640 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-10-23 18:14:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:32,292 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-10-23 18:14:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:14:32,293 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-23 18:14:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:32,295 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:14:32,295 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:14:32,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:14:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:14:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-23 18:14:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:14:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-23 18:14:32,308 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2020-10-23 18:14:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:32,309 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-23 18:14:32,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:14:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-23 18:14:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:14:32,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:32,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:32,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:14:32,525 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:32,526 INFO L82 PathProgramCache]: Analyzing trace with hash 752879968, now seen corresponding path program 1 times [2020-10-23 18:14:32,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:32,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782634519] [2020-10-23 18:14:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782634519] [2020-10-23 18:14:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440211188] [2020-10-23 18:14:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:14:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:14:32,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:32,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-10-23 18:14:32,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248886590] [2020-10-23 18:14:32,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:14:32,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:14:32,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:14:32,780 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2020-10-23 18:14:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:33,393 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-23 18:14:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:14:33,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-23 18:14:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:33,398 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:14:33,398 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 18:14:33,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:14:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 18:14:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-23 18:14:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:14:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2020-10-23 18:14:33,415 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 29 [2020-10-23 18:14:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:33,416 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2020-10-23 18:14:33,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:14:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2020-10-23 18:14:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:14:33,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:33,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:33,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:33,633 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2070859795, now seen corresponding path program 1 times [2020-10-23 18:14:33,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:33,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40412946] [2020-10-23 18:14:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:14:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:14:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:14:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40412946] [2020-10-23 18:14:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001934857] [2020-10-23 18:14:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:33,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:14:33,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:33,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-10-23 18:14:33,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312266486] [2020-10-23 18:14:33,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:14:33,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:14:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:14:33,989 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand 12 states. [2020-10-23 18:14:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:34,926 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2020-10-23 18:14:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:14:34,927 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-23 18:14:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:34,930 INFO L225 Difference]: With dead ends: 111 [2020-10-23 18:14:34,930 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:14:34,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:14:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:14:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:14:34,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:14:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2020-10-23 18:14:34,969 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 41 [2020-10-23 18:14:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:34,973 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2020-10-23 18:14:34,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:14:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2020-10-23 18:14:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:14:34,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:34,979 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:35,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:35,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1960607334, now seen corresponding path program 1 times [2020-10-23 18:14:35,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:35,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376281185] [2020-10-23 18:14:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 18:14:35,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376281185] [2020-10-23 18:14:35,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679475202] [2020-10-23 18:14:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:14:35,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:35,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-23 18:14:35,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193979922] [2020-10-23 18:14:35,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:14:35,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:14:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:14:35,606 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand 14 states. [2020-10-23 18:14:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:37,227 INFO L93 Difference]: Finished difference Result 183 states and 327 transitions. [2020-10-23 18:14:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:14:37,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-23 18:14:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:37,235 INFO L225 Difference]: With dead ends: 183 [2020-10-23 18:14:37,235 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 18:14:37,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:14:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 18:14:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-10-23 18:14:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 18:14:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 171 transitions. [2020-10-23 18:14:37,274 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 171 transitions. Word has length 42 [2020-10-23 18:14:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:37,275 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 171 transitions. [2020-10-23 18:14:37,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:14:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 171 transitions. [2020-10-23 18:14:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-23 18:14:37,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:37,281 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:37,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:37,491 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -751460799, now seen corresponding path program 1 times [2020-10-23 18:14:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:37,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603420516] [2020-10-23 18:14:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:14:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-23 18:14:37,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603420516] [2020-10-23 18:14:37,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739564507] [2020-10-23 18:14:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:14:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-23 18:14:38,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:38,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-10-23 18:14:38,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727602558] [2020-10-23 18:14:38,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:14:38,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:38,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:14:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:14:38,119 INFO L87 Difference]: Start difference. First operand 108 states and 171 transitions. Second operand 15 states. [2020-10-23 18:14:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:39,903 INFO L93 Difference]: Finished difference Result 261 states and 501 transitions. [2020-10-23 18:14:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:14:39,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-23 18:14:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:39,907 INFO L225 Difference]: With dead ends: 261 [2020-10-23 18:14:39,907 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 18:14:39,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:14:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 18:14:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2020-10-23 18:14:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 18:14:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 182 transitions. [2020-10-23 18:14:39,972 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 182 transitions. Word has length 56 [2020-10-23 18:14:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:39,976 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 182 transitions. [2020-10-23 18:14:39,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:14:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 182 transitions. [2020-10-23 18:14:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-23 18:14:39,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:39,983 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:40,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:14:40,197 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:40,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2107233529, now seen corresponding path program 1 times [2020-10-23 18:14:40,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:40,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114200021] [2020-10-23 18:14:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-23 18:14:40,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114200021] [2020-10-23 18:14:40,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467757740] [2020-10-23 18:14:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:40,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:14:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-23 18:14:41,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:41,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-23 18:14:41,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230674955] [2020-10-23 18:14:41,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:14:41,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:41,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:14:41,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:14:41,051 INFO L87 Difference]: Start difference. First operand 114 states and 182 transitions. Second operand 17 states. [2020-10-23 18:14:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:43,294 INFO L93 Difference]: Finished difference Result 246 states and 468 transitions. [2020-10-23 18:14:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 18:14:43,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-23 18:14:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:43,301 INFO L225 Difference]: With dead ends: 246 [2020-10-23 18:14:43,301 INFO L226 Difference]: Without dead ends: 112 [2020-10-23 18:14:43,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:14:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-23 18:14:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 89. [2020-10-23 18:14:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 18:14:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2020-10-23 18:14:43,356 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 112 [2020-10-23 18:14:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:43,360 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2020-10-23 18:14:43,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:14:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2020-10-23 18:14:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-23 18:14:43,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:43,368 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:43,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:43,583 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1050683425, now seen corresponding path program 1 times [2020-10-23 18:14:43,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:43,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5584549] [2020-10-23 18:14:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:43,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 18:14:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 67 proven. 173 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-10-23 18:14:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5584549] [2020-10-23 18:14:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650608524] [2020-10-23 18:14:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:14:44,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 54 proven. 153 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2020-10-23 18:14:44,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:44,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2020-10-23 18:14:44,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257894932] [2020-10-23 18:14:44,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:14:44,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:14:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:14:44,485 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand 16 states. [2020-10-23 18:14:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:46,319 INFO L93 Difference]: Finished difference Result 175 states and 254 transitions. [2020-10-23 18:14:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:14:46,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-10-23 18:14:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:46,322 INFO L225 Difference]: With dead ends: 175 [2020-10-23 18:14:46,323 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 18:14:46,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:14:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 18:14:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-10-23 18:14:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:14:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2020-10-23 18:14:46,348 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 168 [2020-10-23 18:14:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:46,351 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2020-10-23 18:14:46,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:14:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2020-10-23 18:14:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-23 18:14:46,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:46,356 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:46,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:46,562 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -737203870, now seen corresponding path program 1 times [2020-10-23 18:14:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:46,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17243471] [2020-10-23 18:14:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:46,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-23 18:14:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-10-23 18:14:47,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17243471] [2020-10-23 18:14:47,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587905194] [2020-10-23 18:14:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:14:47,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-10-23 18:14:47,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:47,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2020-10-23 18:14:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269780611] [2020-10-23 18:14:47,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:14:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:47,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:14:47,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:14:47,613 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand 18 states. [2020-10-23 18:14:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:49,863 INFO L93 Difference]: Finished difference Result 198 states and 298 transitions. [2020-10-23 18:14:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 18:14:49,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 152 [2020-10-23 18:14:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:49,867 INFO L225 Difference]: With dead ends: 198 [2020-10-23 18:14:49,867 INFO L226 Difference]: Without dead ends: 115 [2020-10-23 18:14:49,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:14:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-23 18:14:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2020-10-23 18:14:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-23 18:14:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 124 transitions. [2020-10-23 18:14:49,894 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 124 transitions. Word has length 152 [2020-10-23 18:14:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:49,896 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 124 transitions. [2020-10-23 18:14:49,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:14:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 124 transitions. [2020-10-23 18:14:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-23 18:14:49,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:49,903 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 18, 18, 14, 12, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:50,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:14:50,118 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1141243885, now seen corresponding path program 2 times [2020-10-23 18:14:50,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:50,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646756070] [2020-10-23 18:14:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 18:14:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-23 18:14:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 18:14:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 159 proven. 563 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2020-10-23 18:14:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646756070] [2020-10-23 18:14:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405902519] [2020-10-23 18:14:51,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:51,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:14:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:14:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 114 proven. 358 refuted. 0 times theorem prover too weak. 1605 trivial. 0 not checked. [2020-10-23 18:14:51,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:51,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 21 [2020-10-23 18:14:51,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801915880] [2020-10-23 18:14:51,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:14:51,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:14:51,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:14:51,471 INFO L87 Difference]: Start difference. First operand 96 states and 124 transitions. Second operand 21 states. [2020-10-23 18:14:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:54,470 INFO L93 Difference]: Finished difference Result 260 states and 424 transitions. [2020-10-23 18:14:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-23 18:14:54,471 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 278 [2020-10-23 18:14:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:54,474 INFO L225 Difference]: With dead ends: 260 [2020-10-23 18:14:54,474 INFO L226 Difference]: Without dead ends: 129 [2020-10-23 18:14:54,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=354, Invalid=2096, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 18:14:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-23 18:14:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-23 18:14:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-23 18:14:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2020-10-23 18:14:54,492 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 278 [2020-10-23 18:14:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:54,493 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2020-10-23 18:14:54,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:14:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2020-10-23 18:14:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-23 18:14:54,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:54,496 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:54,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:54,712 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2086345789, now seen corresponding path program 2 times [2020-10-23 18:14:54,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:54,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773757255] [2020-10-23 18:14:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-23 18:14:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 207 proven. 371 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2020-10-23 18:14:55,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773757255] [2020-10-23 18:14:55,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642080861] [2020-10-23 18:14:55,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:55,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:14:55,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:14:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 275 proven. 129 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-10-23 18:14:55,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:55,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 21 [2020-10-23 18:14:55,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481650396] [2020-10-23 18:14:55,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:14:55,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:14:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:14:55,920 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 21 states. [2020-10-23 18:14:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:59,176 INFO L93 Difference]: Finished difference Result 239 states and 302 transitions. [2020-10-23 18:14:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 18:14:59,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 220 [2020-10-23 18:14:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:59,180 INFO L225 Difference]: With dead ends: 239 [2020-10-23 18:14:59,180 INFO L226 Difference]: Without dead ends: 145 [2020-10-23 18:14:59,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 18:14:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-23 18:14:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2020-10-23 18:14:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-23 18:14:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2020-10-23 18:14:59,201 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 220 [2020-10-23 18:14:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:59,202 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2020-10-23 18:14:59,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:14:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2020-10-23 18:14:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-23 18:14:59,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:59,205 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:59,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:59,422 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash -695303513, now seen corresponding path program 3 times [2020-10-23 18:14:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:59,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088511985] [2020-10-23 18:14:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:14:59,453 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:14:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:14:59,486 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:14:59,542 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:14:59,542 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:14:59,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:14:59,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:14:59 BoogieIcfgContainer [2020-10-23 18:14:59,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:14:59,645 INFO L168 Benchmark]: Toolchain (without parser) took 31181.09 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 126.3 MB in the beginning and 168.3 MB in the end (delta: -42.0 MB). Peak memory consumption was 261.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:59,646 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:14:59,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.07 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:59,647 INFO L168 Benchmark]: Boogie Preprocessor took 41.08 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:59,648 INFO L168 Benchmark]: RCFGBuilder took 703.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 134.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:59,649 INFO L168 Benchmark]: TraceAbstraction took 30138.80 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 133.7 MB in the beginning and 168.3 MB in the end (delta: -34.5 MB). Peak memory consumption was 268.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:59,653 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.07 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.08 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 703.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 134.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30138.80 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 133.7 MB in the beginning and 168.3 MB in the end (delta: -34.5 MB). Peak memory consumption was 268.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 6; VAL [x=6] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L39] int result = fibo1(x); [L40] COND TRUE result == 8 VAL [result=8, x=6] [L41] CALL reach_error() [L4] __assert_fail("0", "fibo_2calls_6-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.9s, OverallIterations: 13, TraceHistogramMax: 21, AutomataDifference: 19.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 403 SDtfs, 942 SDslu, 1135 SDs, 0 SdLazy, 5887 SolverSat, 1022 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 1441 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 157 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 2462 NumberOfCodeBlocks, 2462 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 2261 ConstructedInterpolants, 0 QuantifiedInterpolants, 599861 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3135 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 7714/9896 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...