/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:13:15,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:13:15,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:13:15,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:13:15,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:13:15,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:13:15,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:13:15,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:13:15,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:13:15,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:13:15,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:13:15,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:13:15,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:13:15,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:13:15,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:13:15,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:13:15,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:13:15,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:13:15,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:13:15,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:13:15,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:13:15,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:13:16,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:13:16,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:13:16,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:13:16,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:13:16,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:13:16,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:13:16,029 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 21:13:16,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:13:16,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:13:16,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:13:16,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:13:16,053 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:13:16,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:13:16,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:13:16,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:13:16,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:13:16,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:13:16,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:13:16,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:13:16,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:13:16,055 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:13:16,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:13:16,055 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:13:16,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:13:16,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:13:16,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:13:16,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:13:16,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:13:16,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:13:16,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:13:16,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:13:16,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:13:16,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:13:16,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:16,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:13:16,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:13:16,058 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:13:16,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:13:16,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:13:16,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:13:16,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:13:16,384 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:13:16,385 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-20 21:13:16,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61c3c0b8/d399f546c6714546972eb247dcacf707/FLAGea82ebcd5 [2020-07-20 21:13:17,026 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:13:17,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-20 21:13:17,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61c3c0b8/d399f546c6714546972eb247dcacf707/FLAGea82ebcd5 [2020-07-20 21:13:17,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61c3c0b8/d399f546c6714546972eb247dcacf707 [2020-07-20 21:13:17,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:13:17,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:13:17,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:13:17,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:13:17,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:13:17,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263ebbd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17, skipping insertion in model container [2020-07-20 21:13:17,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:13:17,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:13:17,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:13:17,665 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:13:17,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:13:17,698 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:13:17,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17 WrapperNode [2020-07-20 21:13:17,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:13:17,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:13:17,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:13:17,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:13:17,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (1/1) ... [2020-07-20 21:13:17,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:13:17,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:13:17,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:13:17,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:13:17,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (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 21:13:17,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:13:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:13:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-20 21:13:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:13:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:13:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:13:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-20 21:13:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:13:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:13:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:13:18,135 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:13:18,135 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:13:18,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:18 BoogieIcfgContainer [2020-07-20 21:13:18,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:13:18,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:13:18,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:13:18,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:13:18,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:13:17" (1/3) ... [2020-07-20 21:13:18,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0f6c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:18, skipping insertion in model container [2020-07-20 21:13:18,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:17" (2/3) ... [2020-07-20 21:13:18,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0f6c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:18, skipping insertion in model container [2020-07-20 21:13:18,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:18" (3/3) ... [2020-07-20 21:13:18,152 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-20 21:13:18,166 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:13:18,176 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:13:18,198 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:13:18,268 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:13:18,268 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:13:18,269 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:13:18,269 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:13:18,269 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:13:18,269 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:13:18,270 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:13:18,270 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:13:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-20 21:13:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 21:13:18,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:18,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:18,333 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-20 21:13:18,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:18,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760220255] [2020-07-20 21:13:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:13:18,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:18,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:18,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:13:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:18,549 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:18,555 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:18,582 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:18,584 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:18,587 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:18,608 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 21:13:18,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:18,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760220255] [2020-07-20 21:13:18,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:18,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:18,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205549261] [2020-07-20 21:13:18,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:18,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:18,633 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-20 21:13:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:18,843 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 21:13:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:18,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 21:13:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:18,866 INFO L225 Difference]: With dead ends: 40 [2020-07-20 21:13:18,867 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 21:13:18,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 21:13:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 21:13:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 21:13:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-20 21:13:18,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-20 21:13:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:18,958 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-20 21:13:18,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-20 21:13:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 21:13:18,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:18,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:19,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:19,170 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-20 21:13:19,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:19,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501555668] [2020-07-20 21:13:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:13:19,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:13:19,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:19,266 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 21:13:19,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:19,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501555668] [2020-07-20 21:13:19,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:19,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:19,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146806379] [2020-07-20 21:13:19,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:19,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:19,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:19,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:19,273 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-20 21:13:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:19,327 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-20 21:13:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:19,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 21:13:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:19,329 INFO L225 Difference]: With dead ends: 30 [2020-07-20 21:13:19,329 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 21:13:19,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 21:13:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-20 21:13:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 21:13:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-20 21:13:19,340 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-20 21:13:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:19,341 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-20 21:13:19,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-20 21:13:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:13:19,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:19,343 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] [2020-07-20 21:13:19,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:19,559 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-20 21:13:19,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:19,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681741363] [2020-07-20 21:13:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:13:19,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:19,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:19,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:13:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:19,648 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:19,650 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:19,669 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:19,671 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:19,678 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:13:19,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:19,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681741363] [2020-07-20 21:13:19,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:19,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:19,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613965693] [2020-07-20 21:13:19,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:19,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:19,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:19,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:19,695 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-20 21:13:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:19,842 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-20 21:13:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:19,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 21:13:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:19,845 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:13:19,845 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 21:13:19,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:13:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 21:13:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 21:13:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:13:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-20 21:13:19,875 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-20 21:13:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:19,876 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-20 21:13:19,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-20 21:13:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:13:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:19,886 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] [2020-07-20 21:13:20,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:20,103 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-20 21:13:20,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:20,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500872848] [2020-07-20 21:13:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:13:20,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:20,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:20,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:13:20,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:20,201 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:20,203 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:20,225 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:20,227 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:13:20,233 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 21:13:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:13:20,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:20,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500872848] [2020-07-20 21:13:20,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:20,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:13:20,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054485387] [2020-07-20 21:13:20,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:13:20,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:13:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:20,243 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-20 21:13:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:20,355 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 21:13:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:13:20,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-20 21:13:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:20,358 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:13:20,358 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 21:13:20,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:13:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 21:13:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-20 21:13:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 21:13:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 21:13:20,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-20 21:13:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:20,367 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 21:13:20,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:13:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 21:13:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:13:20,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:20,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:20,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:20,583 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-20 21:13:20,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:20,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856949868] [2020-07-20 21:13:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:13:20,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:13:20,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:13:20,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:20,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856949868] [2020-07-20 21:13:20,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:20,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:13:20,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795813762] [2020-07-20 21:13:20,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:13:20,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:13:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:20,668 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-20 21:13:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:20,732 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-20 21:13:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:13:20,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 21:13:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:20,734 INFO L225 Difference]: With dead ends: 31 [2020-07-20 21:13:20,734 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 21:13:20,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:13:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 21:13:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-20 21:13:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 21:13:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 21:13:20,742 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-20 21:13:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:20,742 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 21:13:20,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:13:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 21:13:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:13:20,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:20,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:20,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:20,959 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-20 21:13:20,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:20,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322213271] [2020-07-20 21:13:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:20,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:13:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:13:21,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:21,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322213271] [2020-07-20 21:13:21,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:21,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:13:21,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295677150] [2020-07-20 21:13:21,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:13:21,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:21,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:13:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:21,057 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-20 21:13:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:21,130 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-20 21:13:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:13:21,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 21:13:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:21,134 INFO L225 Difference]: With dead ends: 34 [2020-07-20 21:13:21,134 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 21:13:21,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:13:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 21:13:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 21:13:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:13:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-20 21:13:21,151 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-20 21:13:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:21,154 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-20 21:13:21,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:13:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-20 21:13:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 21:13:21,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:21,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:21,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:21,375 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-20 21:13:21,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:21,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307412539] [2020-07-20 21:13:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:21,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:13:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 21:13:21,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:21,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307412539] [2020-07-20 21:13:21,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:21,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 21:13:21,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050626309] [2020-07-20 21:13:21,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:13:21,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:13:21,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:21,490 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-20 21:13:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:21,550 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-20 21:13:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:13:21,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-20 21:13:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:21,551 INFO L225 Difference]: With dead ends: 30 [2020-07-20 21:13:21,551 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:13:21,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:13:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:13:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:13:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:13:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:13:21,554 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-20 21:13:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:21,554 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:13:21,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:13:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:13:21,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:13:21,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:21,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:13:21,899 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:13:21,899 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:13:21,899 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-20 21:13:21,899 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-20 21:13:21,900 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= |gcd_#in~y2| gcd_~y2) (not (= gcd_~y1 gcd_~y2)) (< 0 gcd_~y1) (<= gcd_~y1 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-07-20 21:13:21,900 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 21:13:21,900 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-20 21:13:21,900 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= |gcd_#in~y2| gcd_~y2) (< gcd_~y2 gcd_~y1) (< 0 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-07-20 21:13:21,901 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-20 21:13:21,901 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 21:13:21,901 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 21:13:21,901 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-20 21:13:21,901 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:13:21,902 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:13:21,902 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:13:21,902 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:13:21,902 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 21:13:21,902 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-20 21:13:21,903 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-20 21:13:21,903 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-20 21:13:21,903 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 21:13:21,903 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-20 21:13:21,903 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (< 0 main_~m~0) [2020-07-20 21:13:21,904 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-20 21:13:21,904 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 21:13:21,904 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-20 21:13:21,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:13:21 BoogieIcfgContainer [2020-07-20 21:13:21,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:13:21,915 INFO L168 Benchmark]: Toolchain (without parser) took 4517.76 ms. Allocated memory was 136.8 MB in the beginning and 231.2 MB in the end (delta: 94.4 MB). Free memory was 101.7 MB in the beginning and 95.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 100.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:21,916 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:13:21,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.49 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:21,918 INFO L168 Benchmark]: Boogie Preprocessor took 35.21 ms. Allocated memory is still 136.8 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:21,920 INFO L168 Benchmark]: RCFGBuilder took 404.69 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 90.4 MB in the beginning and 167.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:21,921 INFO L168 Benchmark]: TraceAbstraction took 3769.50 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 167.2 MB in the beginning and 95.5 MB in the end (delta: 71.7 MB). Peak memory consumption was 101.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:13:21,925 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.49 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.21 ms. Allocated memory is still 136.8 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.69 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 90.4 MB in the beginning and 167.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3769.50 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 167.2 MB in the beginning and 95.5 MB in the end (delta: 71.7 MB). Peak memory consumption was 101.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 88 SDslu, 517 SDs, 0 SdLazy, 291 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 38 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 157 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6770 SizeOfPredicates, 20 NumberOfNonLiveVariables, 400 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...