/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:13:56,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:13:56,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:13:56,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:13:56,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:13:56,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:13:56,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:13:56,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:13:56,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:13:56,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:13:56,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:13:56,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:13:56,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:13:56,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:13:56,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:13:56,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:13:56,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:13:56,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:13:56,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:13:56,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:13:56,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:13:56,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:13:56,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:13:56,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:13:56,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:13:56,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:13:56,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:13:56,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:13:56,215 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 [2020-07-20 11:13:56,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:13:56,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:13:56,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:13:56,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:13:56,264 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:13:56,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:13:56,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:13:56,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:13:56,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:13:56,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:13:56,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:13:56,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:13:56,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:13:56,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:13:56,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:13:56,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:13:56,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:13:56,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:13:56,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:13:56,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:13:56,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:13:56,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:13:56,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:13:56,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:13:56,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:13:56,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:13:56,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:56,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:13:56,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:13:56,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:13:56,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:13:56,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:13:56,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:13:56,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:13:56,687 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:13:56,688 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-07-20 11:13:56,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d092f45df/8f3c1e12aeba45d393b08725bc6aed16/FLAGcf579966c [2020-07-20 11:13:57,473 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:13:57,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-07-20 11:13:57,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d092f45df/8f3c1e12aeba45d393b08725bc6aed16/FLAGcf579966c [2020-07-20 11:13:57,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d092f45df/8f3c1e12aeba45d393b08725bc6aed16 [2020-07-20 11:13:57,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:13:57,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:13:57,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:13:57,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:13:57,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:13:57,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:13:57" (1/1) ... [2020-07-20 11:13:57,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9592dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:57, skipping insertion in model container [2020-07-20 11:13:57,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:13:57" (1/1) ... [2020-07-20 11:13:57,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:13:57,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:13:58,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:13:58,076 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:13:58,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:13:58,116 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:13:58,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58 WrapperNode [2020-07-20 11:13:58,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:13:58,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:13:58,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:13:58,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:13:58,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (1/1) ... [2020-07-20 11:13:58,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:13:58,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:13:58,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:13:58,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:13:58,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (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 [2020-07-20 11:13:58,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:13:58,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:13:58,346 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 11:13:58,346 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-07-20 11:13:58,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:13:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 11:13:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:13:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 11:13:58,348 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-07-20 11:13:58,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:13:58,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:13:58,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:13:58,670 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:13:58,671 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:13:58,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:13:58 BoogieIcfgContainer [2020-07-20 11:13:58,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:13:58,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:13:58,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:13:58,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:13:58,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:13:57" (1/3) ... [2020-07-20 11:13:58,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c837ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:13:58, skipping insertion in model container [2020-07-20 11:13:58,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:58" (2/3) ... [2020-07-20 11:13:58,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c837ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:13:58, skipping insertion in model container [2020-07-20 11:13:58,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:13:58" (3/3) ... [2020-07-20 11:13:58,705 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-07-20 11:13:58,726 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:13:58,740 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:13:58,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:13:58,836 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:13:58,836 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:13:58,837 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:13:58,838 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:13:58,838 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:13:58,839 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:13:58,839 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:13:58,839 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:13:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 11:13:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:13:58,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:58,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:58,876 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-07-20 11:13:58,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:58,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332583370] [2020-07-20 11:13:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:13:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:13:59,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:13:59,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332583370] [2020-07-20 11:13:59,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:13:59,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:13:59,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438833676] [2020-07-20 11:13:59,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:13:59,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:13:59,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:59,111 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-07-20 11:13:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:59,199 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 11:13:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:13:59,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:13:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:59,216 INFO L225 Difference]: With dead ends: 40 [2020-07-20 11:13:59,217 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 11:13:59,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 11:13:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 11:13:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:13:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-20 11:13:59,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-07-20 11:13:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:59,286 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-20 11:13:59,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:13:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-20 11:13:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:13:59,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:59,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:59,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:59,506 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-07-20 11:13:59,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:59,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671537415] [2020-07-20 11:13:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:13:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:13:59,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:13:59,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671537415] [2020-07-20 11:13:59,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:13:59,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:13:59,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677302946] [2020-07-20 11:13:59,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:13:59,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:13:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:59,620 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-07-20 11:13:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:59,660 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-20 11:13:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:13:59,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 11:13:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:59,663 INFO L225 Difference]: With dead ends: 32 [2020-07-20 11:13:59,664 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 11:13:59,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 11:13:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 11:13:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:13:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-20 11:13:59,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-07-20 11:13:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:59,678 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-20 11:13:59,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:13:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-20 11:13:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:13:59,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:59,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:59,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:59,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-07-20 11:13:59,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:59,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306649285] [2020-07-20 11:13:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:13:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:14:00,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:14:00,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306649285] [2020-07-20 11:14:00,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:14:00,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:14:00,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856801789] [2020-07-20 11:14:00,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:14:00,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:14:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:14:00,052 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-07-20 11:14:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:00,150 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 11:14:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:14:00,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-20 11:14:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:00,153 INFO L225 Difference]: With dead ends: 48 [2020-07-20 11:14:00,153 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:14:00,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:14:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:14:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:14:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:14:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-20 11:14:00,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-07-20 11:14:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:00,163 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-20 11:14:00,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:14:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-20 11:14:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:14:00,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:00,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:00,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:00,383 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:00,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:00,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-07-20 11:14:00,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:00,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156727616] [2020-07-20 11:14:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:14:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:00,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:14:00,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156727616] [2020-07-20 11:14:00,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:14:00,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:14:00,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631151282] [2020-07-20 11:14:00,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:14:00,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:14:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:14:00,525 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-07-20 11:14:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:00,580 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-20 11:14:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:14:00,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 11:14:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:00,583 INFO L225 Difference]: With dead ends: 50 [2020-07-20 11:14:00,583 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:14:00,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:14:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:14:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-07-20 11:14:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 11:14:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 11:14:00,594 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-07-20 11:14:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:00,594 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 11:14:00,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:14:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 11:14:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:14:00,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:00,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:00,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:00,811 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:00,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-07-20 11:14:00,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:00,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907506142] [2020-07-20 11:14:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 11:14:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:01,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907506142] [2020-07-20 11:14:01,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:01,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-20 11:14:01,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785416288] [2020-07-20 11:14:01,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:14:01,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:14:01,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:14:01,619 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 20 states. [2020-07-20 11:14:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:02,039 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-20 11:14:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 11:14:02,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-07-20 11:14:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:02,041 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:14:02,041 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:14:02,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:14:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:14:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:14:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:14:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:14:02,044 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-20 11:14:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:02,044 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:14:02,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:14:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:14:02,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:14:02,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:02,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:14:02,345 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:14:02,347 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:14:02,347 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 11:14:02,349 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-20 11:14:02,354 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-20 11:14:02,355 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-07-20 11:14:02,355 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-07-20 11:14:02,355 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-07-20 11:14:02,355 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-07-20 11:14:02,356 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:14:02,356 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:14:02,356 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:14:02,359 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:14:02,360 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-07-20 11:14:02,360 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-07-20 11:14:02,361 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-20 11:14:02,361 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-07-20 11:14:02,361 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-07-20 11:14:02,361 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-20 11:14:02,361 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 11:14:02,362 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-07-20 11:14:02,362 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:14:02,362 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:14:02,362 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-07-20 11:14:02,362 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-07-20 11:14:02,362 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 11:14:02,362 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-20 11:14:02,363 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 11:14:02,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:14:02 BoogieIcfgContainer [2020-07-20 11:14:02,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:14:02,386 INFO L168 Benchmark]: Toolchain (without parser) took 4577.94 ms. Allocated memory was 137.4 MB in the beginning and 232.8 MB in the end (delta: 95.4 MB). Free memory was 101.3 MB in the beginning and 122.4 MB in the end (delta: -21.1 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:02,387 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 137.4 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:14:02,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.96 ms. Allocated memory is still 137.4 MB. Free memory was 101.1 MB in the beginning and 91.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:02,399 INFO L168 Benchmark]: Boogie Preprocessor took 39.98 ms. Allocated memory is still 137.4 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:02,400 INFO L168 Benchmark]: RCFGBuilder took 527.94 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.1 MB in the beginning and 168.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:02,402 INFO L168 Benchmark]: TraceAbstraction took 3688.63 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 168.6 MB in the beginning and 122.4 MB in the end (delta: 46.2 MB). Peak memory consumption was 77.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:02,417 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 137.4 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.96 ms. Allocated memory is still 137.4 MB. Free memory was 101.1 MB in the beginning and 91.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.98 ms. Allocated memory is still 137.4 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 527.94 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.1 MB in the beginning and 168.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3688.63 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 168.6 MB in the beginning and 122.4 MB in the end (delta: 46.2 MB). Peak memory consumption was 77.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 18 SDslu, 784 SDs, 0 SdLazy, 192 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 6098 SizeOfPredicates, 9 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 8/12 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...