/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/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:54,450 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 10:45:54,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:54,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:54,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:54,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:54,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:54,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:54,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:54,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:54,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:54,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:54,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:54,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:54,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:54,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:54,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:54,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:54,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:54,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:54,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:54,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:54,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:54,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:54,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:54,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:54,499 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 10:45:54,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:54,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:54,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:54,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:54,516 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:54,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:54,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:54,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:54,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:54,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:54,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:54,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:54,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:54,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:54,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:54,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:54,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:54,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:54,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:54,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:54,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:54,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:54,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:54,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:54,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:54,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:54,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:54,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:54,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:54,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:54,796 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:54,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:54,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:54,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:54,814 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:54,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 10:45:54,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c76f5454/988558f09e1b4929a040d695bd958b4c/FLAG2836aa68d [2020-07-20 10:45:55,333 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:55,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 10:45:55,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c76f5454/988558f09e1b4929a040d695bd958b4c/FLAG2836aa68d [2020-07-20 10:45:55,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c76f5454/988558f09e1b4929a040d695bd958b4c [2020-07-20 10:45:55,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:55,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:55,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:55,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:55,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:55,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65155d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55, skipping insertion in model container [2020-07-20 10:45:55,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:55,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:55,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:55,919 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:55,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:55,949 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:55,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55 WrapperNode [2020-07-20 10:45:55,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:55,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:55,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:55,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:55,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:55,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:55,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:55,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:55,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (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 10:45:56,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:56,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:56,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 10:45:56,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:45:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 10:45:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:56,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:56,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:56,541 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:56,541 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:45:56,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:56 BoogieIcfgContainer [2020-07-20 10:45:56,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:56,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:56,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:56,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:56,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:55" (1/3) ... [2020-07-20 10:45:56,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d9e18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:56, skipping insertion in model container [2020-07-20 10:45:56,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (2/3) ... [2020-07-20 10:45:56,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d9e18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:56, skipping insertion in model container [2020-07-20 10:45:56,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:56" (3/3) ... [2020-07-20 10:45:56,554 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-20 10:45:56,565 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:56,572 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:56,586 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:56,610 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:56,611 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:56,611 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:56,611 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:56,611 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:56,611 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:56,612 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:56,612 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 10:45:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 10:45:56,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:56,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:56,641 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 10:45:56,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:56,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84129164] [2020-07-20 10:45:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:45:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:56,812 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 10:45:56,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:56,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84129164] [2020-07-20 10:45:56,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:56,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:45:56,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983966519] [2020-07-20 10:45:56,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:45:56,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:45:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:56,837 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-20 10:45:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:56,989 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-20 10:45:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:45:56,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 10:45:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:57,002 INFO L225 Difference]: With dead ends: 42 [2020-07-20 10:45:57,002 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 10:45:57,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:45:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 10:45:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 10:45:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 10:45:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-20 10:45:57,051 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-20 10:45:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:57,052 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-20 10:45:57,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:45:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-20 10:45:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 10:45:57,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:57,056 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] [2020-07-20 10:45:57,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,271 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 10:45:57,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:57,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646703514] [2020-07-20 10:45:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:45:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:45:57,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:45:57,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646703514] [2020-07-20 10:45:57,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:57,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 10:45:57,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945290989] [2020-07-20 10:45:57,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:57,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:57,468 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-20 10:45:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:57,627 INFO L93 Difference]: Finished difference Result 68 states and 118 transitions. [2020-07-20 10:45:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:45:57,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 10:45:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:57,634 INFO L225 Difference]: With dead ends: 68 [2020-07-20 10:45:57,637 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 10:45:57,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:45:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 10:45:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 10:45:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 10:45:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 69 transitions. [2020-07-20 10:45:57,676 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 69 transitions. Word has length 22 [2020-07-20 10:45:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:57,677 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 69 transitions. [2020-07-20 10:45:57,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 69 transitions. [2020-07-20 10:45:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 10:45:57,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:57,687 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:57,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,888 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 1 times [2020-07-20 10:45:57,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:57,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653578759] [2020-07-20 10:45:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:45:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-20 10:45:58,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:58,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:45:58,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:45:58,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:45:58,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:45:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 10:45:58,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653578759] [2020-07-20 10:45:58,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:58,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 10:45:58,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189524040] [2020-07-20 10:45:58,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:58,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:58,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:58,523 INFO L87 Difference]: Start difference. First operand 44 states and 69 transitions. Second operand 8 states. [2020-07-20 10:45:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:58,614 INFO L93 Difference]: Finished difference Result 61 states and 116 transitions. [2020-07-20 10:45:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:58,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-20 10:45:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:58,619 INFO L225 Difference]: With dead ends: 61 [2020-07-20 10:45:58,619 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 10:45:58,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:45:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 10:45:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 10:45:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 10:45:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-20 10:45:58,640 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 48 [2020-07-20 10:45:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:58,641 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-20 10:45:58,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-20 10:45:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 10:45:58,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:58,647 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:58,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:58,862 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:58,862 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-20 10:45:58,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:58,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234996680] [2020-07-20 10:45:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-20 10:45:59,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 10:46:00,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234996680] [2020-07-20 10:46:00,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:00,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-20 10:46:00,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726531224] [2020-07-20 10:46:00,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 10:46:00,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:00,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 10:46:00,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 10:46:00,816 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 24 states. [2020-07-20 10:46:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:01,667 INFO L93 Difference]: Finished difference Result 226 states and 903 transitions. [2020-07-20 10:46:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 10:46:01,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-20 10:46:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:01,699 INFO L225 Difference]: With dead ends: 226 [2020-07-20 10:46:01,700 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 10:46:01,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 10:46:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 10:46:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 95. [2020-07-20 10:46:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 10:46:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 275 transitions. [2020-07-20 10:46:01,769 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 275 transitions. Word has length 82 [2020-07-20 10:46:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:01,770 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 275 transitions. [2020-07-20 10:46:01,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 10:46:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 275 transitions. [2020-07-20 10:46:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 10:46:01,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:01,778 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:01,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:01,994 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1232135348, now seen corresponding path program 3 times [2020-07-20 10:46:01,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:01,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068939101] [2020-07-20 10:46:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:46:02,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-07-20 10:46:02,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:03,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 144 proven. 197 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-07-20 10:46:04,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068939101] [2020-07-20 10:46:04,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:04,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 22 [2020-07-20 10:46:04,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155915221] [2020-07-20 10:46:04,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:46:04,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:46:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:46:04,126 INFO L87 Difference]: Start difference. First operand 95 states and 275 transitions. Second operand 22 states. [2020-07-20 10:46:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:05,090 INFO L93 Difference]: Finished difference Result 256 states and 1032 transitions. [2020-07-20 10:46:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 10:46:05,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-07-20 10:46:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:05,098 INFO L225 Difference]: With dead ends: 256 [2020-07-20 10:46:05,098 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 10:46:05,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 10:46:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 10:46:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 95. [2020-07-20 10:46:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 10:46:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 251 transitions. [2020-07-20 10:46:05,130 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 251 transitions. Word has length 121 [2020-07-20 10:46:05,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:05,130 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 251 transitions. [2020-07-20 10:46:05,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:46:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 251 transitions. [2020-07-20 10:46:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 10:46:05,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:05,135 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:05,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:05,351 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:05,352 INFO L82 PathProgramCache]: Analyzing trace with hash 33355023, now seen corresponding path program 4 times [2020-07-20 10:46:05,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:05,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227757609] [2020-07-20 10:46:05,353 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 [2020-07-20 10:46:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 10:46:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 481 proven. 167 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-20 10:46:05,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:06,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:06,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 169 proven. 313 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-07-20 10:46:07,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227757609] [2020-07-20 10:46:07,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:07,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-20 10:46:07,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191401531] [2020-07-20 10:46:07,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 10:46:07,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:07,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 10:46:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:46:07,770 INFO L87 Difference]: Start difference. First operand 95 states and 251 transitions. Second operand 19 states. [2020-07-20 10:46:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:08,586 INFO L93 Difference]: Finished difference Result 282 states and 1234 transitions. [2020-07-20 10:46:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 10:46:08,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2020-07-20 10:46:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:08,600 INFO L225 Difference]: With dead ends: 282 [2020-07-20 10:46:08,600 INFO L226 Difference]: Without dead ends: 195 [2020-07-20 10:46:08,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 246 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 10:46:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-20 10:46:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 168. [2020-07-20 10:46:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-20 10:46:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 668 transitions. [2020-07-20 10:46:08,649 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 668 transitions. Word has length 141 [2020-07-20 10:46:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:08,650 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 668 transitions. [2020-07-20 10:46:08,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 10:46:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 668 transitions. [2020-07-20 10:46:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 10:46:08,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:08,658 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:08,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:08,872 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:08,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:08,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2025709664, now seen corresponding path program 5 times [2020-07-20 10:46:08,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:08,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058917810] [2020-07-20 10:46:08,874 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 [2020-07-20 10:46:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:46:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 112 proven. 211 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 10:46:09,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:09,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:09,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 120 proven. 229 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2020-07-20 10:46:10,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058917810] [2020-07-20 10:46:10,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:10,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 10:46:10,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644035706] [2020-07-20 10:46:10,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 10:46:10,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 10:46:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 10:46:10,530 INFO L87 Difference]: Start difference. First operand 168 states and 668 transitions. Second operand 12 states. [2020-07-20 10:46:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:10,724 INFO L93 Difference]: Finished difference Result 297 states and 1999 transitions. [2020-07-20 10:46:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:46:10,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 128 [2020-07-20 10:46:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:10,728 INFO L225 Difference]: With dead ends: 297 [2020-07-20 10:46:10,729 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 10:46:10,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:46:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 10:46:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-07-20 10:46:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:46:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-07-20 10:46:10,757 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 128 [2020-07-20 10:46:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:10,757 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-07-20 10:46:10,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 10:46:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-07-20 10:46:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-20 10:46:10,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:10,765 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:10,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:10,979 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-20 10:46:10,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:10,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762690589] [2020-07-20 10:46:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 10:46:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-20 10:46:11,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:12,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:13,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:13,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:13,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:13,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-07-20 10:46:16,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762690589] [2020-07-20 10:46:16,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:16,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-20 10:46:16,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339897890] [2020-07-20 10:46:16,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 10:46:16,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 10:46:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 10:46:16,167 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 33 states. [2020-07-20 10:46:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:17,422 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2020-07-20 10:46:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 10:46:17,423 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-20 10:46:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:17,425 INFO L225 Difference]: With dead ends: 132 [2020-07-20 10:46:17,425 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 10:46:17,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 10:46:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 10:46:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-20 10:46:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 10:46:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-20 10:46:17,435 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-20 10:46:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:17,436 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-20 10:46:17,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 10:46:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-20 10:46:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 10:46:17,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:17,440 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:17,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:17,656 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 7 times [2020-07-20 10:46:17,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:17,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161755336] [2020-07-20 10:46:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 10:46:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 10:46:18,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:20,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:20,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:20,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:20,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:20,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:20,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-07-20 10:46:23,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161755336] [2020-07-20 10:46:23,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:23,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-20 10:46:23,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541674594] [2020-07-20 10:46:23,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 10:46:23,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:23,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 10:46:23,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:46:23,367 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 30 states. [2020-07-20 10:46:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:24,590 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2020-07-20 10:46:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 10:46:24,591 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-20 10:46:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:24,593 INFO L225 Difference]: With dead ends: 152 [2020-07-20 10:46:24,594 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 10:46:24,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 10:46:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 10:46:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-07-20 10:46:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 10:46:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-07-20 10:46:24,603 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 173 [2020-07-20 10:46:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:24,603 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-07-20 10:46:24,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 10:46:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-07-20 10:46:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-20 10:46:24,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:24,606 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:24,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:24,820 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 8 times [2020-07-20 10:46:24,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:24,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525774293] [2020-07-20 10:46:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 10:46:25,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-20 10:46:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-07-20 10:46:27,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525774293] [2020-07-20 10:46:27,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:27,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-20 10:46:27,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377001848] [2020-07-20 10:46:27,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 10:46:27,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 10:46:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 10:46:27,712 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 35 states. [2020-07-20 10:46:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:39,148 INFO L93 Difference]: Finished difference Result 323 states and 516 transitions. [2020-07-20 10:46:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-20 10:46:39,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-20 10:46:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:39,153 INFO L225 Difference]: With dead ends: 323 [2020-07-20 10:46:39,154 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 10:46:39,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6298 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2142, Invalid=20208, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 10:46:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 10:46:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-07-20 10:46:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 10:46:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-20 10:46:39,190 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 186 [2020-07-20 10:46:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:39,191 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-20 10:46:39,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 10:46:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-20 10:46:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 10:46:39,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:39,194 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:39,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:39,408 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 9 times [2020-07-20 10:46:39,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:39,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643271706] [2020-07-20 10:46:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 10:46:39,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-20 10:46:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:43,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:43,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2020-07-20 10:46:47,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643271706] [2020-07-20 10:46:47,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:47,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-20 10:46:47,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881101004] [2020-07-20 10:46:47,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 10:46:47,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:47,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 10:46:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 10:46:47,358 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-20 10:46:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:48,805 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-20 10:46:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 10:46:48,806 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-20 10:46:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:48,809 INFO L225 Difference]: With dead ends: 238 [2020-07-20 10:46:48,809 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 10:46:48,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 10:46:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 10:46:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-20 10:46:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 10:46:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-20 10:46:48,820 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-20 10:46:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:48,821 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-20 10:46:48,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 10:46:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-20 10:46:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-20 10:46:48,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:48,824 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:49,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:49,038 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 10 times [2020-07-20 10:46:49,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:49,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975462992] [2020-07-20 10:46:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:49,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 10:46:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-20 10:46:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:51,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:52,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:52,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:52,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:52,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:52,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2020-07-20 10:46:53,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975462992] [2020-07-20 10:46:53,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:53,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 23 [2020-07-20 10:46:53,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182200391] [2020-07-20 10:46:53,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 10:46:53,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 10:46:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-07-20 10:46:53,202 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 23 states. [2020-07-20 10:46:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:53,799 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2020-07-20 10:46:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 10:46:53,800 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 212 [2020-07-20 10:46:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:53,802 INFO L225 Difference]: With dead ends: 172 [2020-07-20 10:46:53,802 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 10:46:53,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 380 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 10:46:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 10:46:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-20 10:46:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 10:46:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-07-20 10:46:53,811 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 212 [2020-07-20 10:46:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:53,812 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-07-20 10:46:53,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 10:46:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-07-20 10:46:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-20 10:46:53,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:53,815 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:54,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:54,030 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 11 times [2020-07-20 10:46:54,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:54,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636895846] [2020-07-20 10:46:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:46:54,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-20 10:46:54,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:55,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:55,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:55,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:55,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:55,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:55,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2020-07-20 10:46:55,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636895846] [2020-07-20 10:46:55,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:55,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 10:46:55,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918477079] [2020-07-20 10:46:55,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 10:46:55,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 10:46:55,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 10:46:55,919 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 12 states. [2020-07-20 10:46:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:56,096 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-20 10:46:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:46:56,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-20 10:46:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:56,098 INFO L225 Difference]: With dead ends: 85 [2020-07-20 10:46:56,099 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:46:56,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:46:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:46:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:46:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:46:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:46:56,102 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-20 10:46:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:56,102 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:46:56,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 10:46:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:46:56,102 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:46:56,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:56,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:46:57,084 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 166 [2020-07-20 10:46:57,268 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 125 [2020-07-20 10:46:57,456 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 126 [2020-07-20 10:46:57,762 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 170 [2020-07-20 10:46:57,879 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 99 [2020-07-20 10:46:58,115 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 129 [2020-07-20 10:46:58,222 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 157 [2020-07-20 10:46:58,428 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 157 [2020-07-20 10:46:59,137 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 162 [2020-07-20 10:46:59,635 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 145 [2020-07-20 10:47:00,025 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 166 [2020-07-20 10:47:00,287 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 145 [2020-07-20 10:47:00,787 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 168 [2020-07-20 10:47:01,046 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 164 [2020-07-20 10:47:01,449 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 148 [2020-07-20 10:47:03,568 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 161 [2020-07-20 10:47:06,265 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 144 [2020-07-20 10:47:07,251 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-07-20 10:47:13,279 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 412 DAG size of output: 61 [2020-07-20 10:47:13,529 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 13 [2020-07-20 10:47:13,688 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-07-20 10:47:13,692 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:47:13,692 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:47:13,692 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:47:13,692 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:47:13,692 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:47:13,692 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:47:13,693 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 10:47:13,693 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 10:47:13,693 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 10:47:13,693 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-20 10:47:13,693 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= 0 |ackermann_#in~n|) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-20 10:47:13,694 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse2 (<= |ackermann_#in~n| ackermann_~n)) (.cse3 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse8 (<= |ackermann_#in~m| 1)) (.cse4 (<= 1 |ackermann_#in~m|)) (.cse7 (<= 5 |ackermann_#t~ret1|)) (.cse5 (and (<= 3 |ackermann_#in~m|) .cse2 .cse3)) (.cse9 (and (<= |ackermann_#in~m| 0) .cse2 (<= 0 |ackermann_#in~m|) .cse3)) (.cse0 (<= 3 |ackermann_#t~ret1|)) (.cse1 (<= 2 |ackermann_#in~m|)) (.cse6 (<= 2 |ackermann_#in~n|))) (and (or (and .cse0 .cse1 .cse2 .cse3) (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) (= 5 |ackermann_#t~ret1|) .cse4) .cse5 (and (<= |ackermann_#in~n| 3) (= 4 |ackermann_#t~ret1|)) (and (<= 5 |ackermann_#in~n|) (= 6 |ackermann_#t~ret1|) .cse4) (and .cse6 (<= |ackermann_#in~n| 2)) (and (<= 6 |ackermann_#in~n|) .cse7 .cse4) (and .cse3 .cse8 (= 2 |ackermann_#t~ret1|) .cse4) .cse9) (<= |ackermann_#in~m| ackermann_~m) (or .cse5 (< |ackermann_#in~n| 2) (and .cse0 .cse8 .cse3 .cse4) (and .cse7 .cse3) .cse9) (or .cse5 (= ackermann_~n |ackermann_#in~n|) .cse9) (or .cse5 (<= 3 |ackermann_#in~n|) .cse9 (and (<= |ackermann_#t~ret1| 3) (<= 1 |ackermann_#in~n|)) (and .cse0 .cse1 (<= |ackermann_#t~ret1| 5) .cse2 .cse6 .cse3))))) [2020-07-20 10:47:13,694 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-20 10:47:13,694 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 10:47:13,695 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-20 10:47:13,695 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 10:47:13,695 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 10:47:13,695 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-20 10:47:13,695 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-20 10:47:13,695 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-20 10:47:13,695 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 10:47:13,696 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-20 10:47:13,696 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-20 10:47:13,696 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 10:47:13,696 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-20 10:47:13,696 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-20 10:47:13,696 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 10:47:13,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:47:13 BoogieIcfgContainer [2020-07-20 10:47:13,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:47:13,708 INFO L168 Benchmark]: Toolchain (without parser) took 77981.58 ms. Allocated memory was 137.9 MB in the beginning and 796.4 MB in the end (delta: 658.5 MB). Free memory was 102.8 MB in the beginning and 746.5 MB in the end (delta: -643.7 MB). Peak memory consumption was 665.1 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:13,709 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 10:47:13,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.32 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:13,710 INFO L168 Benchmark]: Boogie Preprocessor took 30.44 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:13,711 INFO L168 Benchmark]: RCFGBuilder took 564.82 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 168.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:13,712 INFO L168 Benchmark]: TraceAbstraction took 77155.36 ms. Allocated memory was 201.9 MB in the beginning and 796.4 MB in the end (delta: 594.5 MB). Free memory was 168.1 MB in the beginning and 746.5 MB in the end (delta: -578.4 MB). Peak memory consumption was 666.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:13,717 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.32 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.44 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 564.82 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 168.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 77155.36 ms. Allocated memory was 201.9 MB in the beginning and 796.4 MB in the end (delta: 594.5 MB). Free memory was 168.1 MB in the beginning and 746.5 MB in the end (delta: -578.4 MB). Peak memory consumption was 666.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 59.6s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 19.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 427 SDtfs, 669 SDslu, 2638 SDs, 0 SdLazy, 9925 SolverSat, 2340 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3829 GetRequests, 3101 SyntacticMatches, 180 SemanticMatches, 548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred 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: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 332 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 817 PreInvPairs, 11220 NumberOfFragments, 260 HoareAnnotationTreeSize, 817 FomulaSimplifications, 1179996 FormulaSimplificationTreeSizeReduction, 10.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 277484 FormulaSimplificationTreeSizeReductionInter, 6.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 34.8s InterpolantComputationTime, 1771 NumberOfCodeBlocks, 1771 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 3502 ConstructedInterpolants, 0 QuantifiedInterpolants, 1134538 SizeOfPredicates, 103 NumberOfNonLiveVariables, 5223 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 25442/31626 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...