/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/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:44:37,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:44:37,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:44:37,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:44:37,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:44:37,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:44:37,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:44:37,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:44:37,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:44:37,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:44:37,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:44:37,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:44:37,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:44:37,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:44:37,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:44:37,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:44:37,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:44:37,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:44:37,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:44:37,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:44:37,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:44:37,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:44:37,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:44:37,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:44:37,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 11:44:37,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 11:44:37,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 11:44:37,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 11:44:37,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 11:44:37,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 11:44:37,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 11:44:37,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 11:44:37,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 11:44:37,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 11:44:37,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 11:44:37,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 11:44:37,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 11:44:37,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 11:44:37,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:44:37,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:44:37,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:44:37,683 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 11:44:37,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:44:37,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:44:37,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:44:37,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:44:37,722 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:44:37,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:44:37,725 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:44:37,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:44:37,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:44:37,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:44:37,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:44:37,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:44:37,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:44:37,726 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:44:37,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:44:37,727 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:44:37,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:44:37,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:44:37,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:44:37,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:44:37,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:44:37,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:37,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:44:37,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:44:37,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:44:37,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:44:37,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:44:37,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:44:37,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:44:37,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:44:38,026 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:44:38,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:44:38,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:44:38,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:44:38,053 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:44:38,054 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-17 11:44:38,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf74b48c/5af4de21213d4d779f790e4081447196/FLAGca9f33030 [2020-07-17 11:44:38,526 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:44:38,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-17 11:44:38,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf74b48c/5af4de21213d4d779f790e4081447196/FLAGca9f33030 [2020-07-17 11:44:38,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf74b48c/5af4de21213d4d779f790e4081447196 [2020-07-17 11:44:38,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:44:38,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:44:38,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:38,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:44:38,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:44:38,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:38" (1/1) ... [2020-07-17 11:44:38,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e532aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:38, skipping insertion in model container [2020-07-17 11:44:38,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:38" (1/1) ... [2020-07-17 11:44:38,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:44:38,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:44:39,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:39,109 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:44:39,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:39,135 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:44:39,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39 WrapperNode [2020-07-17 11:44:39,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:39,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:44:39,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:44:39,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:44:39,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (1/1) ... [2020-07-17 11:44:39,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:44:39,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:44:39,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:44:39,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:44:39,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (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 11:44:39,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:44:39,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:44:39,321 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-17 11:44:39,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:44:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:44:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:44:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-17 11:44:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:44:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:44:39,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:44:39,480 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:44:39,480 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:44:39,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:39 BoogieIcfgContainer [2020-07-17 11:44:39,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:44:39,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:44:39,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:44:39,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:44:39,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:44:38" (1/3) ... [2020-07-17 11:44:39,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ef51ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:39, skipping insertion in model container [2020-07-17 11:44:39,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:39" (2/3) ... [2020-07-17 11:44:39,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ef51ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:39, skipping insertion in model container [2020-07-17 11:44:39,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:39" (3/3) ... [2020-07-17 11:44:39,492 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-17 11:44:39,504 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:44:39,512 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:44:39,541 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:44:39,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:44:39,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:44:39,609 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:44:39,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:44:39,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:44:39,609 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:44:39,609 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:44:39,609 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:44:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-17 11:44:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:44:39,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:39,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:39,655 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-07-17 11:44:39,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:39,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598567698] [2020-07-17 11:44:39,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,035 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 11:44:40,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598567698] [2020-07-17 11:44:40,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:40,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 11:44:40,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106411488] [2020-07-17 11:44:40,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 11:44:40,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 11:44:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:40,062 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-07-17 11:44:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:40,245 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-17 11:44:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 11:44:40,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-17 11:44:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:40,269 INFO L225 Difference]: With dead ends: 34 [2020-07-17 11:44:40,269 INFO L226 Difference]: Without dead ends: 20 [2020-07-17 11:44:40,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:44:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-17 11:44:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-17 11:44:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-17 11:44:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-07-17 11:44:40,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-07-17 11:44:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:40,345 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-07-17 11:44:40,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 11:44:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-07-17 11:44:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 11:44:40,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:40,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:40,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:44:40,349 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-07-17 11:44:40,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:40,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140238259] [2020-07-17 11:44:40,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 11:44:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140238259] [2020-07-17 11:44:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004797251] [2020-07-17 11:44:40,597 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 11:44:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:40,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-17 11:44:40,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 11:44:40,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:40,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-17 11:44:40,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077448562] [2020-07-17 11:44:40,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 11:44:40,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 11:44:40,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:44:40,741 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 12 states. [2020-07-17 11:44:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:40,928 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-17 11:44:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 11:44:40,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-07-17 11:44:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:40,929 INFO L225 Difference]: With dead ends: 20 [2020-07-17 11:44:40,929 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 11:44:40,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-17 11:44:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 11:44:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 11:44:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 11:44:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 11:44:40,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-17 11:44:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:40,933 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 11:44:40,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 11:44:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 11:44:40,934 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 11:44:41,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 11:44:41,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 11:44:41,183 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 11:44:41,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:44:41,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:44:41,184 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 11:44:41,184 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 11:44:41,184 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 11:44:41,184 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-07-17 11:44:41,184 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-17 11:44:41,185 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-07-17 11:44:41,185 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-07-17 11:44:41,185 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-17 11:44:41,185 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-17 11:44:41,185 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-17 11:44:41,185 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-07-17 11:44:41,186 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 11:44:41,186 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-07-17 11:44:41,186 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-07-17 11:44:41,186 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-07-17 11:44:41,186 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-07-17 11:44:41,187 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 11:44:41,187 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-07-17 11:44:41,187 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-17 11:44:41,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:44:41 BoogieIcfgContainer [2020-07-17 11:44:41,194 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:44:41,197 INFO L168 Benchmark]: Toolchain (without parser) took 2309.42 ms. Allocated memory was 146.3 MB in the beginning and 232.8 MB in the end (delta: 86.5 MB). Free memory was 104.1 MB in the beginning and 181.4 MB in the end (delta: -77.3 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:41,198 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 11:44:41,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.36 ms. Allocated memory is still 146.3 MB. Free memory was 103.7 MB in the beginning and 94.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:41,200 INFO L168 Benchmark]: Boogie Preprocessor took 25.48 ms. Allocated memory is still 146.3 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:41,201 INFO L168 Benchmark]: RCFGBuilder took 321.66 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.1 MB in the beginning and 172.2 MB in the end (delta: -79.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:41,202 INFO L168 Benchmark]: TraceAbstraction took 1708.68 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 171.6 MB in the beginning and 181.4 MB in the end (delta: -9.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:41,206 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.36 ms. Allocated memory is still 146.3 MB. Free memory was 103.7 MB in the beginning and 94.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.48 ms. Allocated memory is still 146.3 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.66 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.1 MB in the beginning and 172.2 MB in the end (delta: -79.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1708.68 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 171.6 MB in the beginning and 181.4 MB in the end (delta: -9.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 20 SDslu, 110 SDs, 0 SdLazy, 130 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5016 SizeOfPredicates, 5 NumberOfNonLiveVariables, 61 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 16/24 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 correct! Received shutdown request...