/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:59:43,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:59:43,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:59:43,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:59:43,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:59:43,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:59:43,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:59:43,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:59:43,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:59:43,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:59:43,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:59:43,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:59:43,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:59:43,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:59:43,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:59:43,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:59:43,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:59:43,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:59:43,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:59:43,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:59:43,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:59:43,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:59:43,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:59:43,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:59:43,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:59:43,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:59:43,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:59:43,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:59:43,265 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 [2020-07-17 11:59:43,286 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:59:43,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:59:43,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:59:43,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:59:43,289 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:59:43,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:59:43,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:59:43,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:59:43,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:59:43,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:59:43,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:59:43,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:59:43,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:59:43,291 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:59:43,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:59:43,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:59:43,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:59:43,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:59:43,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:59:43,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:59:43,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:59:43,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:43,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:59:43,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:59:43,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:59:43,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:59:43,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:59:43,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:59:43,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:59:43,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:59:43,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:59:43,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:59:43,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:59:43,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:59:43,602 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:59:43,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-07-17 11:59:43,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bd2f78e/43d692f4fc93424c8583c82e573366eb/FLAG798fe4b16 [2020-07-17 11:59:44,080 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:59:44,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-07-17 11:59:44,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bd2f78e/43d692f4fc93424c8583c82e573366eb/FLAG798fe4b16 [2020-07-17 11:59:44,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bd2f78e/43d692f4fc93424c8583c82e573366eb [2020-07-17 11:59:44,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:59:44,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:59:44,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:44,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:59:44,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:59:44,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b2e7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44, skipping insertion in model container [2020-07-17 11:59:44,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:59:44,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:59:44,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:44,655 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:59:44,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:44,686 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:59:44,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44 WrapperNode [2020-07-17 11:59:44,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:44,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:59:44,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:59:44,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:59:44,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (1/1) ... [2020-07-17 11:59:44,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:59:44,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:59:44,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:59:44,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:59:44,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (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 [2020-07-17 11:59:44,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:59:44,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:59:44,897 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 11:59:44,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:59:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:59:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:59:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 11:59:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:59:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:59:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:59:45,123 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:59:45,123 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:59:45,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:45 BoogieIcfgContainer [2020-07-17 11:59:45,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:59:45,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:59:45,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:59:45,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:59:45,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:59:44" (1/3) ... [2020-07-17 11:59:45,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47235b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:45, skipping insertion in model container [2020-07-17 11:59:45,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:44" (2/3) ... [2020-07-17 11:59:45,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47235b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:45, skipping insertion in model container [2020-07-17 11:59:45,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:45" (3/3) ... [2020-07-17 11:59:45,136 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-07-17 11:59:45,146 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:59:45,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:59:45,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:59:45,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:59:45,191 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:59:45,192 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:59:45,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:59:45,192 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:59:45,192 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:59:45,192 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:59:45,192 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:59:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 11:59:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:59:45,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:45,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:45,217 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-17 11:59:45,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:45,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56702174] [2020-07-17 11:59:45,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:59:45,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56702174] [2020-07-17 11:59:45,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:45,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:45,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214140292] [2020-07-17 11:59:45,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:45,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:45,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:45,536 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-17 11:59:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:45,630 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-17 11:59:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:45,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 11:59:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:45,642 INFO L225 Difference]: With dead ends: 30 [2020-07-17 11:59:45,642 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 11:59:45,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:59:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 11:59:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 11:59:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 11:59:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-17 11:59:45,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-17 11:59:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:45,689 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-17 11:59:45,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-17 11:59:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 11:59:45,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:45,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:45,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:59:45,693 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-17 11:59:45,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:45,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206041364] [2020-07-17 11:59:45,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:45,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206041364] [2020-07-17 11:59:45,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145847038] [2020-07-17 11:59:45,831 INFO L94 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 [2020-07-17 11:59:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:59:45,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:45,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:45,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 11:59:45,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725856627] [2020-07-17 11:59:45,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:59:45,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:59:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:59:45,980 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-17 11:59:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:46,041 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-17 11:59:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 11:59:46,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-17 11:59:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:46,044 INFO L225 Difference]: With dead ends: 25 [2020-07-17 11:59:46,044 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 11:59:46,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 11:59:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 11:59:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:59:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-17 11:59:46,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-17 11:59:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:46,053 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-17 11:59:46,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:59:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-17 11:59:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 11:59:46,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:46,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:46,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 11:59:46,272 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-17 11:59:46,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:46,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021984374] [2020-07-17 11:59:46,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:46,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021984374] [2020-07-17 11:59:46,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85637852] [2020-07-17 11:59:46,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:46,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:46,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:46,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:59:46,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:46,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:46,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-17 11:59:46,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924982219] [2020-07-17 11:59:46,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:59:46,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:46,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:59:46,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:59:46,540 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-17 11:59:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:46,606 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-17 11:59:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 11:59:46,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-17 11:59:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:46,608 INFO L225 Difference]: With dead ends: 28 [2020-07-17 11:59:46,608 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 11:59:46,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:59:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 11:59:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-17 11:59:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 11:59:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 11:59:46,616 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-17 11:59:46,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:46,617 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 11:59:46,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:59:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 11:59:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 11:59:46,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:46,619 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:46,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:46,834 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:46,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-17 11:59:46,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:46,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972473949] [2020-07-17 11:59:46,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 11:59:47,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972473949] [2020-07-17 11:59:47,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744927292] [2020-07-17 11:59:47,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:47,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 11:59:47,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:47,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:59:47,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 11:59:47,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:47,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-07-17 11:59:47,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772310358] [2020-07-17 11:59:47,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 11:59:47,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 11:59:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-07-17 11:59:47,195 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2020-07-17 11:59:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:47,368 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-17 11:59:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:59:47,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-07-17 11:59:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:47,371 INFO L225 Difference]: With dead ends: 31 [2020-07-17 11:59:47,371 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 11:59:47,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-07-17 11:59:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 11:59:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 11:59:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 11:59:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-17 11:59:47,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-17 11:59:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:47,388 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-17 11:59:47,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 11:59:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-17 11:59:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 11:59:47,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:47,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:47,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:47,607 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:47,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:47,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-17 11:59:47,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:47,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905241875] [2020-07-17 11:59:47,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 11:59:47,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905241875] [2020-07-17 11:59:47,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510537441] [2020-07-17 11:59:47,813 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:47,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:59:47,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:47,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 11:59:47,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 11:59:47,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-17 11:59:47,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352252642] [2020-07-17 11:59:47,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 11:59:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 11:59:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:59:47,893 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-17 11:59:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:47,995 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 11:59:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:59:47,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-17 11:59:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:48,000 INFO L225 Difference]: With dead ends: 34 [2020-07-17 11:59:48,001 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:59:48,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-17 11:59:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:59:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 11:59:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 11:59:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 11:59:48,011 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-17 11:59:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:48,011 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 11:59:48,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 11:59:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 11:59:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 11:59:48,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:48,013 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:48,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:48,222 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:48,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-17 11:59:48,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:48,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511772136] [2020-07-17 11:59:48,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 11:59:48,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511772136] [2020-07-17 11:59:48,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515971746] [2020-07-17 11:59:48,437 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:48,482 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 11:59:48,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:48,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 11:59:48,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 11:59:48,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:48,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2020-07-17 11:59:48,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164713131] [2020-07-17 11:59:48,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 11:59:48,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 11:59:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-07-17 11:59:48,681 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2020-07-17 11:59:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:48,927 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-17 11:59:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:59:48,927 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-07-17 11:59:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:48,929 INFO L225 Difference]: With dead ends: 37 [2020-07-17 11:59:48,929 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 11:59:48,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 11:59:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 11:59:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 11:59:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 11:59:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 11:59:48,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-17 11:59:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:48,937 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 11:59:48,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 11:59:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 11:59:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 11:59:48,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:48,939 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:49,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 11:59:49,153 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-17 11:59:49,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:49,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942269837] [2020-07-17 11:59:49,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 11:59:49,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942269837] [2020-07-17 11:59:49,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387677852] [2020-07-17 11:59:49,339 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:49,380 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 11:59:49,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:49,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 11:59:49,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 11:59:49,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:49,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-17 11:59:49,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66336416] [2020-07-17 11:59:49,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 11:59:49,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 11:59:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:59:49,465 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-17 11:59:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:49,587 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-17 11:59:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:59:49,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-17 11:59:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:49,590 INFO L225 Difference]: With dead ends: 40 [2020-07-17 11:59:49,590 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 11:59:49,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-17 11:59:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 11:59:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-17 11:59:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 11:59:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-17 11:59:49,603 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-17 11:59:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:49,603 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-17 11:59:49,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 11:59:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-17 11:59:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 11:59:49,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:49,613 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:49,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:49,829 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-17 11:59:49,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:49,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708412535] [2020-07-17 11:59:49,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 11:59:50,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708412535] [2020-07-17 11:59:50,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120755974] [2020-07-17 11:59:50,025 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 11:59:50,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 11:59:50,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:50,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-17 11:59:50,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602847342] [2020-07-17 11:59:50,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 11:59:50,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:50,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 11:59:50,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-17 11:59:50,121 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-17 11:59:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:50,243 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-17 11:59:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:59:50,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-17 11:59:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:50,246 INFO L225 Difference]: With dead ends: 43 [2020-07-17 11:59:50,246 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 11:59:50,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-17 11:59:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 11:59:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-17 11:59:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 11:59:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-17 11:59:50,254 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-17 11:59:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:50,254 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-17 11:59:50,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 11:59:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-17 11:59:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 11:59:50,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:50,256 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:50,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:50,465 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-17 11:59:50,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:50,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969604653] [2020-07-17 11:59:50,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 11:59:50,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969604653] [2020-07-17 11:59:50,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045731294] [2020-07-17 11:59:50,701 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:50,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:50,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:50,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 11:59:50,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 11:59:50,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:50,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-17 11:59:50,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666753318] [2020-07-17 11:59:50,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 11:59:50,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:50,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 11:59:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:59:50,789 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-17 11:59:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:50,905 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 11:59:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 11:59:50,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-17 11:59:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:50,907 INFO L225 Difference]: With dead ends: 46 [2020-07-17 11:59:50,907 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 11:59:50,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-17 11:59:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 11:59:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 11:59:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 11:59:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-17 11:59:50,915 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-17 11:59:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:50,915 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-17 11:59:50,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 11:59:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-17 11:59:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 11:59:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:50,917 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:51,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 11:59:51,135 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-17 11:59:51,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:51,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446864474] [2020-07-17 11:59:51,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 11:59:51,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446864474] [2020-07-17 11:59:51,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883481503] [2020-07-17 11:59:51,434 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:51,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-17 11:59:51,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:51,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-17 11:59:51,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 11:59:51,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:51,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-07-17 11:59:51,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130863603] [2020-07-17 11:59:51,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 11:59:51,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 11:59:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 11:59:51,951 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2020-07-17 11:59:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:52,424 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 11:59:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 11:59:52,427 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2020-07-17 11:59:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:52,429 INFO L225 Difference]: With dead ends: 49 [2020-07-17 11:59:52,429 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 11:59:52,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 11:59:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 11:59:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 11:59:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 11:59:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 11:59:52,446 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-17 11:59:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:52,449 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 11:59:52,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 11:59:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 11:59:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 11:59:52,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:52,451 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:52,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:52,670 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-17 11:59:52,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:52,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126198710] [2020-07-17 11:59:52,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:59:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:59:52,715 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 11:59:52,715 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 11:59:52,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 11:59:52,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:59:52 BoogieIcfgContainer [2020-07-17 11:59:52,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:59:52,763 INFO L168 Benchmark]: Toolchain (without parser) took 8283.61 ms. Allocated memory was 140.5 MB in the beginning and 300.4 MB in the end (delta: 159.9 MB). Free memory was 103.5 MB in the beginning and 253.6 MB in the end (delta: -150.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:52,764 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 11:59:52,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.89 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:52,765 INFO L168 Benchmark]: Boogie Preprocessor took 29.45 ms. Allocated memory is still 140.5 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:52,774 INFO L168 Benchmark]: RCFGBuilder took 409.89 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 171.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:52,774 INFO L168 Benchmark]: TraceAbstraction took 7632.05 ms. Allocated memory was 202.4 MB in the beginning and 300.4 MB in the end (delta: 98.0 MB). Free memory was 170.4 MB in the beginning and 253.6 MB in the end (delta: -83.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:52,780 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 205.89 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.45 ms. Allocated memory is still 140.5 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.89 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 171.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7632.05 ms. Allocated memory was 202.4 MB in the beginning and 300.4 MB in the end (delta: 98.0 MB). Free memory was 170.4 MB in the beginning and 253.6 MB in the end (delta: -83.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; VAL [input=10] [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=10, input=10] [L11] int result = id(input); [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 192 SDslu, 695 SDs, 0 SdLazy, 452 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 860 NumberOfCodeBlocks, 855 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 83784 SizeOfPredicates, 43 NumberOfNonLiveVariables, 898 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 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...