/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:45,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:45,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:45,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 13:06:45,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:45,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:45,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:45,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:45,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:45,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:45,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:45,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:45,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:45,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:45,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:45,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:45,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:06:45,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:45,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:45,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:45,573 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 13:06:45,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:45,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:45,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:45,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:45,595 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:45,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:45,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:45,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:45,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:45,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:45,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:45,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:45,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:45,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:45,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:45,598 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:45,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:45,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:45,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:45,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:45,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:45,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:45,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:45,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:45,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:45,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:45,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:45,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:45,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:45,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:06:45,905 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:45,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:45,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:45,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:45,927 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:45,928 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 13:06:46,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4665b0a0f/e191bd86b8da4c30a614570be098a30b/FLAGed023597c [2020-07-20 13:06:46,468 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:46,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 13:06:46,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4665b0a0f/e191bd86b8da4c30a614570be098a30b/FLAGed023597c [2020-07-20 13:06:46,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4665b0a0f/e191bd86b8da4c30a614570be098a30b [2020-07-20 13:06:46,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:46,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:46,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:46,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:46,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:46,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:46" (1/1) ... [2020-07-20 13:06:46,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbfd2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:46, skipping insertion in model container [2020-07-20 13:06:46,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:46" (1/1) ... [2020-07-20 13:06:46,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:46,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:47,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:47,128 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:47,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:47,165 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:47,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47 WrapperNode [2020-07-20 13:06:47,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:47,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:47,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:47,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:47,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (1/1) ... [2020-07-20 13:06:47,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:47,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:47,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:47,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:47,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (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 13:06:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 13:06:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:06:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 13:06:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:47,551 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:47,551 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:06:47,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:47 BoogieIcfgContainer [2020-07-20 13:06:47,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:47,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:47,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:47,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:47,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:46" (1/3) ... [2020-07-20 13:06:47,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3f7e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:47, skipping insertion in model container [2020-07-20 13:06:47,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:47" (2/3) ... [2020-07-20 13:06:47,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3f7e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:47, skipping insertion in model container [2020-07-20 13:06:47,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:47" (3/3) ... [2020-07-20 13:06:47,565 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-20 13:06:47,577 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:47,585 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:47,608 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:47,679 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:47,679 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:47,679 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:47,679 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:47,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:47,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:47,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:47,680 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 13:06:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 13:06:47,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:47,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:47,731 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:47,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 13:06:47,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:47,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222455977] [2020-07-20 13:06:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:47,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:47,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:06:47,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:47,928 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 13:06:47,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:47,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222455977] [2020-07-20 13:06:47,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:47,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:06:47,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316589377] [2020-07-20 13:06:47,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:06:47,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:47,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:06:47,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:06:47,953 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 13:06:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:48,131 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-07-20 13:06:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:06:48,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 13:06:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:48,146 INFO L225 Difference]: With dead ends: 39 [2020-07-20 13:06:48,146 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 13:06:48,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:06:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 13:06:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 13:06:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 13:06:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 13:06:48,203 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-20 13:06:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:48,204 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 13:06:48,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:06:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 13:06:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 13:06:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:48,208 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 13:06:48,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:48,422 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 13:06:48,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:48,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610051184] [2020-07-20 13:06:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:48,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:48,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:06:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:06:48,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:06:48,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610051184] [2020-07-20 13:06:48,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:06:48,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-07-20 13:06:48,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365517645] [2020-07-20 13:06:48,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:06:48,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:06:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:06:48,852 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-20 13:06:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:49,047 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-20 13:06:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:06:49,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 13:06:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:49,049 INFO L225 Difference]: With dead ends: 32 [2020-07-20 13:06:49,050 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:06:49,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:06:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:06:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 13:06:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:06:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-20 13:06:49,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-20 13:06:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:49,062 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-20 13:06:49,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:06:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-20 13:06:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 13:06:49,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:49,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:49,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:49,271 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-20 13:06:49,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:49,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893793723] [2020-07-20 13:06:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:49,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:06:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:06:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:06:49,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:06:49,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893793723] [2020-07-20 13:06:49,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:49,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 13:06:49,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101196199] [2020-07-20 13:06:49,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:06:49,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:49,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:06:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:06:49,510 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-07-20 13:06:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:49,658 INFO L93 Difference]: Finished difference Result 53 states and 81 transitions. [2020-07-20 13:06:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:06:49,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 13:06:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:49,661 INFO L225 Difference]: With dead ends: 53 [2020-07-20 13:06:49,661 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:06:49,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:06:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:06:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 13:06:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 13:06:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-20 13:06:49,671 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-20 13:06:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:49,671 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-20 13:06:49,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:06:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-20 13:06:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 13:06:49,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:49,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:49,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:49,888 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-20 13:06:49,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:49,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540296472] [2020-07-20 13:06:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:49,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:06:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:06:50,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 13:06:50,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540296472] [2020-07-20 13:06:50,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:50,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-07-20 13:06:50,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807151216] [2020-07-20 13:06:50,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:06:50,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:06:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:06:50,640 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 22 states. [2020-07-20 13:06:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:51,323 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions. [2020-07-20 13:06:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 13:06:51,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-07-20 13:06:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:51,341 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:06:51,341 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 13:06:51,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 13:06:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 13:06:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-07-20 13:06:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:06:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 67 transitions. [2020-07-20 13:06:51,364 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 67 transitions. Word has length 35 [2020-07-20 13:06:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:51,365 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 67 transitions. [2020-07-20 13:06:51,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:06:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 67 transitions. [2020-07-20 13:06:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 13:06:51,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:51,369 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:51,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:51,571 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash -692340191, now seen corresponding path program 2 times [2020-07-20 13:06:51,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:51,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190086538] [2020-07-20 13:06:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:51,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:06:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 13:06:51,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:52,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:52,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 13:06:52,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190086538] [2020-07-20 13:06:52,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:52,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:06:52,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420604898] [2020-07-20 13:06:52,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:06:52,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:06:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:06:52,208 INFO L87 Difference]: Start difference. First operand 41 states and 67 transitions. Second operand 13 states. [2020-07-20 13:06:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:52,471 INFO L93 Difference]: Finished difference Result 101 states and 246 transitions. [2020-07-20 13:06:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:06:52,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-20 13:06:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:52,477 INFO L225 Difference]: With dead ends: 101 [2020-07-20 13:06:52,477 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 13:06:52,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:06:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 13:06:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-20 13:06:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 13:06:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 135 transitions. [2020-07-20 13:06:52,518 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 135 transitions. Word has length 49 [2020-07-20 13:06:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:52,521 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 135 transitions. [2020-07-20 13:06:52,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:06:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 135 transitions. [2020-07-20 13:06:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 13:06:52,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:52,528 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:52,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:52,742 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:52,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2059848011, now seen corresponding path program 3 times [2020-07-20 13:06:52,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:52,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188610693] [2020-07-20 13:06:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:52,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:06:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:52,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:06:52,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 13:06:52,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-20 13:06:52,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188610693] [2020-07-20 13:06:52,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:52,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-07-20 13:06:52,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164985651] [2020-07-20 13:06:52,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:52,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:52,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:52,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:52,962 INFO L87 Difference]: Start difference. First operand 68 states and 135 transitions. Second operand 5 states. [2020-07-20 13:06:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:53,023 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-07-20 13:06:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:06:53,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-07-20 13:06:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:53,028 INFO L225 Difference]: With dead ends: 125 [2020-07-20 13:06:53,028 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 13:06:53,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:06:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 13:06:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-20 13:06:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 13:06:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-07-20 13:06:53,064 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 56 [2020-07-20 13:06:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:53,065 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-07-20 13:06:53,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-07-20 13:06:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 13:06:53,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:53,076 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:53,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:53,289 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:53,290 INFO L82 PathProgramCache]: Analyzing trace with hash -615976298, now seen corresponding path program 4 times [2020-07-20 13:06:53,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:53,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069812088] [2020-07-20 13:06:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:53,344 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:06:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 37 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 13:06:53,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 80 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-20 13:06:55,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069812088] [2020-07-20 13:06:55,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:55,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-20 13:06:55,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029368881] [2020-07-20 13:06:55,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:06:55,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:06:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:06:55,106 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 24 states. [2020-07-20 13:06:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:55,476 INFO L93 Difference]: Finished difference Result 100 states and 206 transitions. [2020-07-20 13:06:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:06:55,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-07-20 13:06:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:55,478 INFO L225 Difference]: With dead ends: 100 [2020-07-20 13:06:55,478 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:06:55,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:06:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:06:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:06:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:06:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:06:55,481 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-07-20 13:06:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:55,481 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:06:55,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:06:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:06:55,482 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:06:55,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:55,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:06:56,169 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2020-07-20 13:06:56,263 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:06:56,263 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:06:56,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:06:56,264 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:06:56,264 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:06:56,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:06:56,264 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-20 13:06:56,264 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 13:06:56,264 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-20 13:06:56,265 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 13:06:56,265 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-20 13:06:56,265 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= |ackermann_#in~m| ackermann_~m)) (.cse1 (<= |ackermann_#in~n| ackermann_~n)) (.cse2 (<= 1 |ackermann_#in~m|))) (or (and .cse0 .cse1 (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse2) (and .cse0 (<= ackermann_~m 0) .cse1 (<= 0 |ackermann_#in~m|)) (and .cse0 (<= 3 |ackermann_#t~ret1|) .cse1 (<= ackermann_~m |ackermann_#in~m|) .cse2))) [2020-07-20 13:06:56,265 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 13:06:56,265 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 13:06:56,266 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-20 13:06:56,266 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-20 13:06:56,266 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-20 13:06:56,266 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-20 13:06:56,267 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-20 13:06:56,267 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 13:06:56,267 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-20 13:06:56,267 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-20 13:06:56,267 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-20 13:06:56,268 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-20 13:06:56,268 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-07-20 13:06:56,268 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-20 13:06:56,268 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-20 13:06:56,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:06:56 BoogieIcfgContainer [2020-07-20 13:06:56,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:06:56,283 INFO L168 Benchmark]: Toolchain (without parser) took 9448.51 ms. Allocated memory was 135.8 MB in the beginning and 326.6 MB in the end (delta: 190.8 MB). Free memory was 99.5 MB in the beginning and 201.9 MB in the end (delta: -102.4 MB). Peak memory consumption was 88.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:56,284 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 135.8 MB. Free memory is still 117.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:06:56,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.12 ms. Allocated memory is still 135.8 MB. Free memory was 99.1 MB in the beginning and 89.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:56,293 INFO L168 Benchmark]: Boogie Preprocessor took 112.13 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 89.0 MB in the beginning and 177.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:56,294 INFO L168 Benchmark]: RCFGBuilder took 277.53 ms. Allocated memory is still 199.2 MB. Free memory was 177.3 MB in the beginning and 164.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:56,295 INFO L168 Benchmark]: TraceAbstraction took 8722.09 ms. Allocated memory was 199.2 MB in the beginning and 326.6 MB in the end (delta: 127.4 MB). Free memory was 163.8 MB in the beginning and 201.9 MB in the end (delta: -38.1 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:56,307 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 135.8 MB. Free memory is still 117.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 330.12 ms. Allocated memory is still 135.8 MB. Free memory was 99.1 MB in the beginning and 89.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.13 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 89.0 MB in the beginning and 177.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.53 ms. Allocated memory is still 199.2 MB. Free memory was 177.3 MB in the beginning and 164.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8722.09 ms. Allocated memory was 199.2 MB in the beginning and 326.6 MB in the end (delta: 127.4 MB). Free memory was 163.8 MB in the beginning and 201.9 MB in the end (delta: -38.1 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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: 8.0s, OverallIterations: 7, TraceHistogramMax: 9, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 153 SDtfs, 178 SDslu, 698 SDs, 0 SdLazy, 909 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 432 SyntacticMatches, 23 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 145 PreInvPairs, 197 NumberOfFragments, 91 HoareAnnotationTreeSize, 145 FomulaSimplifications, 204 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 609 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 274 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 49756 SizeOfPredicates, 25 NumberOfNonLiveVariables, 750 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 655/788 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...