/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/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:41:25,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:41:25,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:41:25,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:41:25,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:41:25,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:41:25,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:41:25,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:41:25,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:41:25,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:41:25,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:41:25,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:41:25,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:41:25,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:41:25,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:41:25,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:41:25,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:41:25,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:41:25,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:41:25,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:41:25,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:41:25,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:41:25,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:41:25,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:41:25,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 10:41:25,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 10:41:25,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 10:41:25,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 10:41:25,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 10:41:25,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 10:41:25,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:41:25,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:41:25,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:41:25,634 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 [2020-07-21 10:41:25,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:41:25,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:41:25,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:41:25,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:41:25,650 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:41:25,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:41:25,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:41:25,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:41:25,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:41:25,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:41:25,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:41:25,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:41:25,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:41:25,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:41:25,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:41:25,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:41:25,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:41:25,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:41:25,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:41:25,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:41:25,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:41:25,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:41:25,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:41:25,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:41:25,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:41:25,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:41:25,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:25,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:41:25,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:41:25,655 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 [2020-07-21 10:41:25,953 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:41:25,967 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:41:25,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:41:25,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:41:25,973 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:41:25,974 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 10:41:26,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b538ca64/793264745cef4a659bf6901e858faa24/FLAG8a235dbce [2020-07-21 10:41:26,484 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:41:26,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 10:41:26,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b538ca64/793264745cef4a659bf6901e858faa24/FLAG8a235dbce [2020-07-21 10:41:26,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b538ca64/793264745cef4a659bf6901e858faa24 [2020-07-21 10:41:26,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:41:26,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:41:26,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:41:26,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:41:26,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:41:26,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:26" (1/1) ... [2020-07-21 10:41:26,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a350d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:26, skipping insertion in model container [2020-07-21 10:41:26,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:26" (1/1) ... [2020-07-21 10:41:26,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:41:26,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:41:27,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:41:27,130 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:41:27,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:41:27,160 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:41:27,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27 WrapperNode [2020-07-21 10:41:27,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:41:27,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:41:27,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:41:27,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:41:27,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (1/1) ... [2020-07-21 10:41:27,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:41:27,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:41:27,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:41:27,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:41:27,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (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 [2020-07-21 10:41:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:41:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:41:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-21 10:41:27,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:41:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:41:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:41:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-21 10:41:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:41:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:41:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:41:27,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:41:27,574 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:41:27,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:27 BoogieIcfgContainer [2020-07-21 10:41:27,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:41:27,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:41:27,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:41:27,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:41:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:41:26" (1/3) ... [2020-07-21 10:41:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571f1ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:27, skipping insertion in model container [2020-07-21 10:41:27,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:27" (2/3) ... [2020-07-21 10:41:27,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571f1ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:27, skipping insertion in model container [2020-07-21 10:41:27,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:27" (3/3) ... [2020-07-21 10:41:27,613 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-21 10:41:27,641 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:41:27,657 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:41:27,671 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:41:27,696 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:41:27,696 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:41:27,696 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:41:27,696 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:41:27,697 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:41:27,697 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:41:27,697 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:41:27,697 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:41:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 10:41:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 10:41:27,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:27,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:27,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-21 10:41:27,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:27,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559647495] [2020-07-21 10:41:27,744 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 [2020-07-21 10:41:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:41:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:27,914 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:27,919 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:27,940 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:27,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:27,954 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:41:27,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:27,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559647495] [2020-07-21 10:41:27,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:27,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:41:27,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404076295] [2020-07-21 10:41:27,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:41:27,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:41:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:41:27,996 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-21 10:41:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:28,144 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 10:41:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:41:28,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 10:41:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:28,158 INFO L225 Difference]: With dead ends: 40 [2020-07-21 10:41:28,158 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 10:41:28,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:41:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 10:41:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 10:41:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 10:41:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 10:41:28,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 10:41:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:28,208 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 10:41:28,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:41:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 10:41:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 10:41:28,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:28,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:28,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:28,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-21 10:41:28,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:28,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054804115] [2020-07-21 10:41:28,415 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 [2020-07-21 10:41:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 10:41:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:41:28,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:28,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054804115] [2020-07-21 10:41:28,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:28,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:41:28,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527683839] [2020-07-21 10:41:28,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:41:28,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:41:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:41:28,500 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 10:41:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:28,555 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 10:41:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:41:28,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 10:41:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:28,557 INFO L225 Difference]: With dead ends: 30 [2020-07-21 10:41:28,557 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 10:41:28,559 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 [2020-07-21 10:41:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 10:41:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 10:41:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 10:41:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 10:41:28,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-21 10:41:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:28,568 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 10:41:28,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:41:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 10:41:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 10:41:28,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:28,570 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] [2020-07-21 10:41:28,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:28,785 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-21 10:41:28,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:28,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652660100] [2020-07-21 10:41:28,787 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 [2020-07-21 10:41:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:41:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:28,857 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:28,859 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:28,880 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:28,882 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:28,886 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:41:28,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:28,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652660100] [2020-07-21 10:41:28,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:28,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:41:28,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217332723] [2020-07-21 10:41:28,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:41:28,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:28,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:41:28,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:41:28,896 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 10:41:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:29,055 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-21 10:41:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:41:29,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 10:41:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:29,058 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:41:29,058 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:41:29,059 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 [2020-07-21 10:41:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:41:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 10:41:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:41:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-21 10:41:29,068 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-21 10:41:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:29,068 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-21 10:41:29,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:41:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-21 10:41:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 10:41:29,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:29,081 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] [2020-07-21 10:41:29,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:29,295 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-21 10:41:29,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:29,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241857876] [2020-07-21 10:41:29,296 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 [2020-07-21 10:41:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:29,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:41:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:29,382 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:29,384 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:29,398 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:29,400 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:41:29,417 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 10:41:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:41:29,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:29,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241857876] [2020-07-21 10:41:29,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:29,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 10:41:29,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305828443] [2020-07-21 10:41:29,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 10:41:29,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 10:41:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:41:29,423 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-21 10:41:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:29,528 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:41:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:41:29,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-21 10:41:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:29,530 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:41:29,530 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 10:41:29,531 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 [2020-07-21 10:41:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 10:41:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 10:41:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 10:41:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 10:41:29,538 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-21 10:41:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:29,538 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 10:41:29,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 10:41:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 10:41:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 10:41:29,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:29,540 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] [2020-07-21 10:41:29,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:29,755 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:29,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-21 10:41:29,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:29,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992465916] [2020-07-21 10:41:29,756 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) [2020-07-21 10:41:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:41:29,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:29,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992465916] [2020-07-21 10:41:29,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:29,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 10:41:29,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658910185] [2020-07-21 10:41:29,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 10:41:29,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 10:41:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:41:29,834 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-21 10:41:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:29,885 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 10:41:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:41:29,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 10:41:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:29,887 INFO L225 Difference]: With dead ends: 31 [2020-07-21 10:41:29,887 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 10:41:29,888 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 [2020-07-21 10:41:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 10:41:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 10:41:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 10:41:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 10:41:29,893 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-21 10:41:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:29,894 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 10:41:29,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 10:41:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 10:41:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 10:41:29,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:29,896 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] [2020-07-21 10:41:30,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:30,108 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-21 10:41:30,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:30,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467286238] [2020-07-21 10:41:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 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 [2020-07-21 10:41:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:30,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:41:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:41:30,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:30,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467286238] [2020-07-21 10:41:30,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:30,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 10:41:30,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387687703] [2020-07-21 10:41:30,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 10:41:30,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 10:41:30,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:41:30,181 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-21 10:41:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:30,237 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-21 10:41:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:41:30,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 10:41:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:30,239 INFO L225 Difference]: With dead ends: 34 [2020-07-21 10:41:30,239 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:41:30,240 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 [2020-07-21 10:41:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:41:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:41:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:41:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-21 10:41:30,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-21 10:41:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:30,247 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-21 10:41:30,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 10:41:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-21 10:41:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 10:41:30,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:30,249 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] [2020-07-21 10:41:30,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:30,462 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:30,463 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-21 10:41:30,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:30,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604862739] [2020-07-21 10:41:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 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 [2020-07-21 10:41:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:41:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 10:41:30,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:30,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604862739] [2020-07-21 10:41:30,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:30,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 10:41:30,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291165942] [2020-07-21 10:41:30,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:41:30,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:41:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:41:30,553 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-21 10:41:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:30,630 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 10:41:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:41:30,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 10:41:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:30,632 INFO L225 Difference]: With dead ends: 30 [2020-07-21 10:41:30,632 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:41:30,633 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 [2020-07-21 10:41:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:41:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:41:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:41:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:41:30,634 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-21 10:41:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:30,634 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:41:30,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:41:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:41:30,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:41:30,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:30,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:41:30,993 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:41:30,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:30,993 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-21 10:41:30,994 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-21 10:41:30,994 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)) [2020-07-21 10:41:30,994 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 10:41:30,994 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-21 10:41:30,995 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)) [2020-07-21 10:41:30,995 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-21 10:41:30,995 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 10:41:30,995 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 10:41:30,995 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 10:41:30,995 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:30,996 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:41:30,996 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:41:30,996 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:41:30,997 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 10:41:30,998 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-21 10:41:30,998 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-21 10:41:30,998 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-21 10:41:30,998 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 10:41:30,998 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-21 10:41:30,999 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (< 0 main_~n~0) (< 0 main_~m~0)) [2020-07-21 10:41:30,999 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-21 10:41:30,999 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 10:41:30,999 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 10:41:31,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:41:31 BoogieIcfgContainer [2020-07-21 10:41:31,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:41:31,017 INFO L168 Benchmark]: Toolchain (without parser) took 4093.79 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 101.6 MB in the beginning and 101.0 MB in the end (delta: 515.4 kB). Peak memory consumption was 97.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:31,019 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 10:41:31,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.37 ms. Allocated memory is still 137.9 MB. Free memory was 101.1 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:31,021 INFO L168 Benchmark]: Boogie Preprocessor took 30.65 ms. Allocated memory is still 137.9 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:31,027 INFO L168 Benchmark]: RCFGBuilder took 401.13 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 90.2 MB in the beginning and 168.2 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:31,028 INFO L168 Benchmark]: TraceAbstraction took 3413.92 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 167.5 MB in the beginning and 101.0 MB in the end (delta: 66.5 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:31,039 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.37 ms. Allocated memory is still 137.9 MB. Free memory was 101.1 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.65 ms. Allocated memory is still 137.9 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.13 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 90.2 MB in the beginning and 168.2 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3413.92 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 167.5 MB in the beginning and 101.0 MB in the end (delta: 66.5 MB). Peak memory consumption was 99.0 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: 3.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 93 SDslu, 486 SDs, 0 SdLazy, 270 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6770 SizeOfPredicates, 20 NumberOfNonLiveVariables, 460 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...