/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/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:48,743 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 13:06:48,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:48,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:48,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:48,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:48,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:48,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:48,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:48,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:48,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:48,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:48,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:48,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:48,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:06:48,803 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 13:06:48,833 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:48,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:48,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:48,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:48,836 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:48,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:48,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:48,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:48,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:48,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:48,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:48,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:48,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:48,839 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:48,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:48,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:48,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:48,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:48,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:48,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:48,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:48,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:48,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:48,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:48,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:48,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:48,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:48,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:48,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:48,842 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 13:06:49,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:49,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:49,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:49,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:49,155 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:49,156 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 13:06:49,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e182d20/3a0d9cb9297d4e4eaf19ea4f61db653a/FLAG9f5948f7f [2020-07-20 13:06:49,706 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:49,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 13:06:49,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e182d20/3a0d9cb9297d4e4eaf19ea4f61db653a/FLAG9f5948f7f [2020-07-20 13:06:50,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e182d20/3a0d9cb9297d4e4eaf19ea4f61db653a [2020-07-20 13:06:50,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:50,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:50,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:50,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:50,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:50,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c291f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50, skipping insertion in model container [2020-07-20 13:06:50,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:50,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:50,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:50,286 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:50,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:50,318 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:50,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50 WrapperNode [2020-07-20 13:06:50,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:50,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:50,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:50,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:50,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (1/1) ... [2020-07-20 13:06:50,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:50,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:50,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:50,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:50,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (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 13:06:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 13:06:50,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:06:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 13:06:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:50,747 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:50,747 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:06:50,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:50 BoogieIcfgContainer [2020-07-20 13:06:50,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:50,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:50,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:50,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:50,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:50" (1/3) ... [2020-07-20 13:06:50,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8e95cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:50, skipping insertion in model container [2020-07-20 13:06:50,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:50" (2/3) ... [2020-07-20 13:06:50,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8e95cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:50, skipping insertion in model container [2020-07-20 13:06:50,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:50" (3/3) ... [2020-07-20 13:06:50,782 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-20 13:06:50,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:50,823 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:50,839 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:50,864 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:50,864 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:50,864 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:50,865 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:50,865 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:50,865 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:50,865 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:50,865 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 13:06:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 13:06:50,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:50,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:50,891 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 13:06:50,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:50,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724230851] [2020-07-20 13:06:50,903 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 13:06:50,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:50,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:51,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:51,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724230851] [2020-07-20 13:06:51,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:51,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:06:51,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375547298] [2020-07-20 13:06:51,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:51,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:51,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:51,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:51,102 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-20 13:06:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:51,263 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-20 13:06:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:51,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 13:06:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:51,277 INFO L225 Difference]: With dead ends: 42 [2020-07-20 13:06:51,277 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:06:51,281 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 13:06:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:06:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 13:06:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 13:06:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-20 13:06:51,335 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-20 13:06:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:51,335 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-20 13:06:51,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-20 13:06:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 13:06:51,339 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:51,339 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 13:06:51,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:51,553 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:51,554 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 13:06:51,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:51,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114746257] [2020-07-20 13:06:51,556 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 13:06:51,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:51,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:06:51,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:06:51,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:51,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:51,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:06:51,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114746257] [2020-07-20 13:06:51,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:51,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 13:06:51,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945290989] [2020-07-20 13:06:51,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:06:51,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:51,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:06:51,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:06:51,903 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-20 13:06:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:52,021 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-20 13:06:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:06:52,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 13:06:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:52,024 INFO L225 Difference]: With dead ends: 38 [2020-07-20 13:06:52,024 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 13:06:52,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 13:06:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 13:06:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 13:06:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-07-20 13:06:52,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 22 [2020-07-20 13:06:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:52,038 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-07-20 13:06:52,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:06:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-07-20 13:06:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 13:06:52,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:52,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:52,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:52,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-07-20 13:06:52,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:52,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623835017] [2020-07-20 13:06:52,259 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 13:06:52,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:06:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:52,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:52,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623835017] [2020-07-20 13:06:52,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:52,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 13:06:52,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075038564] [2020-07-20 13:06:52,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:06:52,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:52,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:06:52,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:06:52,447 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 8 states. [2020-07-20 13:06:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:52,585 INFO L93 Difference]: Finished difference Result 87 states and 187 transitions. [2020-07-20 13:06:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:06:52,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-20 13:06:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:52,597 INFO L225 Difference]: With dead ends: 87 [2020-07-20 13:06:52,597 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 13:06:52,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 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 13:06:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 13:06:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 13:06:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 13:06:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-20 13:06:52,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 29 [2020-07-20 13:06:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:52,647 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-20 13:06:52,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:06:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-20 13:06:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 13:06:52,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:52,667 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:52,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:52,868 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 1 times [2020-07-20 13:06:52,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:52,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245815854] [2020-07-20 13:06:52,869 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 13:06:52,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:06:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 157 proven. 146 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2020-07-20 13:06:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:53,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:54,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:54,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:54,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:54,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:54,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 159 proven. 168 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-07-20 13:06:54,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245815854] [2020-07-20 13:06:54,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:54,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 13:06:54,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36280283] [2020-07-20 13:06:54,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:06:54,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:06:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:06:54,590 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 12 states. [2020-07-20 13:06:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:54,833 INFO L93 Difference]: Finished difference Result 128 states and 498 transitions. [2020-07-20 13:06:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:06:54,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-07-20 13:06:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:54,841 INFO L225 Difference]: With dead ends: 128 [2020-07-20 13:06:54,842 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 13:06:54,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:06:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 13:06:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 13:06:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:06:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-07-20 13:06:54,873 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 122 [2020-07-20 13:06:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:54,875 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-07-20 13:06:54,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:06:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-07-20 13:06:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 13:06:54,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:54,881 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 13:06:55,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:55,082 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-20 13:06:55,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:55,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840752232] [2020-07-20 13:06:55,084 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 13:06:55,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:55,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:06:55,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:55,287 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 13:06:55,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:56,912 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 13:06:56,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840752232] [2020-07-20 13:06:56,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:56,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-20 13:06:56,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523364021] [2020-07-20 13:06:56,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:06:56,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:56,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:06:56,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:06:56,915 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 24 states. [2020-07-20 13:06:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:57,282 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-07-20 13:06:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:06:57,282 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-20 13:06:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:57,284 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:06:57,284 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 13:06:57,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 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 13:06:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 13:06:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-20 13:06:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:06:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-20 13:06:57,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 82 [2020-07-20 13:06:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:57,296 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-20 13:06:57,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:06:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-20 13:06:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-20 13:06:57,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:57,299 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:57,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:57,512 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:57,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1706548602, now seen corresponding path program 3 times [2020-07-20 13:06:57,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:57,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609190951] [2020-07-20 13:06:57,514 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 13:06:57,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 13:06:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-20 13:06:57,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:59,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:59,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:59,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 410 proven. 201 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-07-20 13:07:02,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609190951] [2020-07-20 13:07:02,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:02,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 35 [2020-07-20 13:07:02,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83999216] [2020-07-20 13:07:02,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 13:07:02,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 13:07:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:07:02,326 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 35 states. [2020-07-20 13:07:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:03,522 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-07-20 13:07:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 13:07:03,523 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 147 [2020-07-20 13:07:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:03,530 INFO L225 Difference]: With dead ends: 126 [2020-07-20 13:07:03,531 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 13:07:03,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 241 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=3600, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 13:07:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 13:07:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-07-20 13:07:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:07:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 13:07:03,560 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 147 [2020-07-20 13:07:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:03,560 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 13:07:03,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 13:07:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 13:07:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-20 13:07:03,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:03,569 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:07:03,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:03,786 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1628439286, now seen corresponding path program 4 times [2020-07-20 13:07:03,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:03,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119445782] [2020-07-20 13:07:03,787 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 13:07:03,927 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:07:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 13:07:03,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-20 13:07:04,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:05,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:05,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:05,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:05,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-07-20 13:07:06,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119445782] [2020-07-20 13:07:06,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:06,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-20 13:07:06,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535267413] [2020-07-20 13:07:06,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:07:06,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:06,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:07:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:07:06,262 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 19 states. [2020-07-20 13:07:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:06,785 INFO L93 Difference]: Finished difference Result 119 states and 153 transitions. [2020-07-20 13:07:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 13:07:06,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-07-20 13:07:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:06,787 INFO L225 Difference]: With dead ends: 119 [2020-07-20 13:07:06,787 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 13:07:06,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 13:07:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 13:07:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-20 13:07:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:07:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-20 13:07:06,799 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 147 [2020-07-20 13:07:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:06,799 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-20 13:07:06,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:07:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-20 13:07:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-20 13:07:06,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:06,802 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 13:07:07,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:07,014 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 5 times [2020-07-20 13:07:07,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:07,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784687168] [2020-07-20 13:07:07,016 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 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 13:07:07,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:07:07,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 13:07:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:07,402 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 13:07:07,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:08,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:08,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:09,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:09,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:12,226 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 13:07:12,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784687168] [2020-07-20 13:07:12,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:12,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-20 13:07:12,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047253313] [2020-07-20 13:07:12,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 13:07:12,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:12,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 13:07:12,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 13:07:12,229 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 33 states. [2020-07-20 13:07:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:13,413 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-07-20 13:07:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 13:07:13,414 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-20 13:07:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:13,416 INFO L225 Difference]: With dead ends: 137 [2020-07-20 13:07:13,416 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 13:07:13,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 13:07:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 13:07:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-20 13:07:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 13:07:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-20 13:07:13,430 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-20 13:07:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:13,430 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-20 13:07:13,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 13:07:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-20 13:07:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 13:07:13,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:13,433 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 13:07:13,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:13,647 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-20 13:07:13,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:13,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100569727] [2020-07-20 13:07:13,650 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 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 13:07:13,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:07:13,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 13:07:13,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:14,120 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 13:07:14,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:16,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:16,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:16,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:16,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:16,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:16,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:16,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:19,471 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 13:07:19,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100569727] [2020-07-20 13:07:19,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:19,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-20 13:07:19,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82461927] [2020-07-20 13:07:19,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 13:07:19,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 13:07:19,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:07:19,474 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 30 states. [2020-07-20 13:07:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:20,655 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2020-07-20 13:07:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 13:07:20,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-20 13:07:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:20,658 INFO L225 Difference]: With dead ends: 152 [2020-07-20 13:07:20,658 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 13:07:20,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 13:07:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 13:07:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-07-20 13:07:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 13:07:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-07-20 13:07:20,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 173 [2020-07-20 13:07:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:20,674 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-07-20 13:07:20,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 13:07:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-07-20 13:07:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-20 13:07:20,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:20,677 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 13:07:20,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:20,892 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-20 13:07:20,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:20,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449103776] [2020-07-20 13:07:20,893 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 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 13:07:21,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:07:21,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 13:07:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:21,523 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 13:07:21,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:23,852 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 13:07:23,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449103776] [2020-07-20 13:07:23,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:23,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-20 13:07:23,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504724121] [2020-07-20 13:07:23,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 13:07:23,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 13:07:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:07:23,855 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 35 states. [2020-07-20 13:07:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:36,205 INFO L93 Difference]: Finished difference Result 323 states and 516 transitions. [2020-07-20 13:07:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-20 13:07:36,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-20 13:07:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:36,212 INFO L225 Difference]: With dead ends: 323 [2020-07-20 13:07:36,212 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 13:07:36,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2142, Invalid=20208, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 13:07:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 13:07:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-07-20 13:07:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 13:07:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-20 13:07:36,241 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 186 [2020-07-20 13:07:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:36,241 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-20 13:07:36,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 13:07:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-20 13:07:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 13:07:36,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:36,245 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 13:07:36,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:36,460 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 8 times [2020-07-20 13:07:36,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:36,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236860336] [2020-07-20 13:07:36,461 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 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 13:07:36,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:07:36,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 13:07:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:37,050 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 13:07:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:40,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:40,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:41,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:41,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:44,404 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 13:07:44,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236860336] [2020-07-20 13:07:44,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:44,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-20 13:07:44,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671898602] [2020-07-20 13:07:44,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 13:07:44,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:44,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 13:07:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 13:07:44,406 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-20 13:07:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:45,989 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-20 13:07:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 13:07:45,990 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-20 13:07:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:45,993 INFO L225 Difference]: With dead ends: 238 [2020-07-20 13:07:45,994 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 13:07:45,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 13:07:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 13:07:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-20 13:07:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 13:07:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-20 13:07:46,012 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-20 13:07:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:46,013 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-20 13:07:46,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 13:07:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-20 13:07:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-20 13:07:46,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:46,019 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 13:07:46,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:46,235 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 9 times [2020-07-20 13:07:46,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:46,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876195182] [2020-07-20 13:07:46,237 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 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 13:07:46,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:07:46,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 13:07:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:46,798 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 13:07:46,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:49,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:49,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:50,457 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 13:07:50,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876195182] [2020-07-20 13:07:50,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:50,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 23 [2020-07-20 13:07:50,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080788934] [2020-07-20 13:07:50,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 13:07:50,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 13:07:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:07:50,459 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 23 states. [2020-07-20 13:07:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:51,133 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2020-07-20 13:07:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 13:07:51,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 212 [2020-07-20 13:07:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:51,136 INFO L225 Difference]: With dead ends: 172 [2020-07-20 13:07:51,136 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:07:51,138 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 13:07:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:07:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-20 13:07:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 13:07:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-07-20 13:07:51,146 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 212 [2020-07-20 13:07:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:51,146 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-07-20 13:07:51,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 13:07:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-07-20 13:07:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-20 13:07:51,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:07:51,151 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 13:07:51,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:51,365 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:07:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:07:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 10 times [2020-07-20 13:07:51,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:07:51,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901649551] [2020-07-20 13:07:51,366 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 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 13:07:51,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:07:51,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:07:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:07:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:07:51,856 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 13:07:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:07:52,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:52,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:53,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:53,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:07:53,329 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 13:07:53,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901649551] [2020-07-20 13:07:53,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:53,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 13:07:53,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464354043] [2020-07-20 13:07:53,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:07:53,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:07:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:07:53,332 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 12 states. [2020-07-20 13:07:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:07:53,501 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-20 13:07:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:07:53,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-20 13:07:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:07:53,503 INFO L225 Difference]: With dead ends: 85 [2020-07-20 13:07:53,504 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:07:53,506 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 13:07:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:07:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:07:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:07:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:07:53,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-20 13:07:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:07:53,507 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:07:53,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:07:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:07:53,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:07:53,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:07:53,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:07:54,291 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-07-20 13:07:54,435 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-07-20 13:07:54,772 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2020-07-20 13:07:55,256 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 78 [2020-07-20 13:07:59,933 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 10 [2020-07-20 13:08:03,803 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 320 DAG size of output: 59 [2020-07-20 13:08:04,067 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 12 [2020-07-20 13:08:04,220 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-07-20 13:08:04,224 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:08:04,224 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:08:04,225 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:08:04,225 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:08:04,225 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:08:04,225 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:08:04,225 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 13:08:04,225 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 13:08:04,226 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_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 13:08:04,226 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-20 13:08:04,226 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 13:08:04,226 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse11 (<= |ackermann_#in~m| ackermann_~m)) (.cse13 (<= |ackermann_#in~n| ackermann_~n)) (.cse12 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse4 (and .cse11 (<= |ackermann_#in~m| 0) .cse13 (<= 0 |ackermann_#in~m|) .cse12)) (.cse1 (<= |ackermann_#in~m| 1)) (.cse5 (<= 2 |ackermann_#in~m|))) (and (let ((.cse2 (<= 3 |ackermann_#in~n|)) (.cse3 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 2 |ackermann_#in~n|)) (.cse9 (<= 3 |ackermann_#t~ret1|)) (.cse10 (<= |ackermann_#t~ret1| 3)) (.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse7 (< |ackermann_#in~n| 2)) (.cse8 (<= 1 |ackermann_#in~n|))) (or (<= 3 |ackermann_#in~m|) (and .cse0 .cse1 .cse2 (<= |ackermann_#in~n| 3) (= 4 |ackermann_#t~ret1|)) (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse0 (= 5 |ackermann_#t~ret1|)) (and (<= 6 |ackermann_#in~n|) .cse0 .cse3) .cse4 (and .cse5 .cse0 .cse3 .cse2) (and .cse5 (<= |ackermann_#t~ret1| 5) .cse0 .cse3 .cse6) (and .cse0 .cse7 .cse1 (= 2 |ackermann_#t~ret1|) .cse8) (and .cse9 .cse10 .cse0 .cse6 .cse1 (<= |ackermann_#in~n| 2)) (and .cse0 (<= 5 |ackermann_#in~n|) (= 6 |ackermann_#t~ret1|)) (and .cse9 .cse5 .cse10 .cse0 .cse7 .cse8))) (or .cse4 (and .cse11 .cse1 .cse12 (<= 1 |ackermann_#in~m|)) (and .cse11 .cse5 .cse13 .cse12))))) [2020-07-20 13:08:04,227 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-20 13:08:04,227 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 13:08:04,227 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-20 13:08:04,227 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 13:08:04,227 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 13:08:04,228 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-20 13:08:04,228 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-20 13:08:04,228 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-20 13:08:04,228 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 13:08:04,228 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-20 13:08:04,228 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-20 13:08:04,229 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 13:08:04,229 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-20 13:08:04,229 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-20 13:08:04,229 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 13:08:04,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:08:04 BoogieIcfgContainer [2020-07-20 13:08:04,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:08:04,237 INFO L168 Benchmark]: Toolchain (without parser) took 74181.30 ms. Allocated memory was 136.3 MB in the beginning and 694.7 MB in the end (delta: 558.4 MB). Free memory was 101.7 MB in the beginning and 588.8 MB in the end (delta: -487.1 MB). Peak memory consumption was 588.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:04,238 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:08:04,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.17 ms. Allocated memory is still 136.3 MB. Free memory was 101.2 MB in the beginning and 91.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:04,239 INFO L168 Benchmark]: Boogie Preprocessor took 25.35 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:04,240 INFO L168 Benchmark]: RCFGBuilder took 408.10 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 90.4 MB in the beginning and 166.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:04,240 INFO L168 Benchmark]: TraceAbstraction took 73480.47 ms. Allocated memory was 200.3 MB in the beginning and 694.7 MB in the end (delta: 494.4 MB). Free memory was 166.2 MB in the beginning and 588.8 MB in the end (delta: -422.6 MB). Peak memory consumption was 588.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:04,243 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.17 ms. Allocated memory is still 136.3 MB. Free memory was 101.2 MB in the beginning and 91.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.35 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.10 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 90.4 MB in the beginning and 166.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 73480.47 ms. Allocated memory was 200.3 MB in the beginning and 694.7 MB in the end (delta: 494.4 MB). Free memory was 166.2 MB in the beginning and 588.8 MB in the end (delta: -422.6 MB). Peak memory consumption was 588.7 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: 62.8s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 411 SDtfs, 611 SDslu, 2598 SDs, 0 SdLazy, 9350 SolverSat, 1917 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3829 GetRequests, 3094 SyntacticMatches, 184 SemanticMatches, 551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11472 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=10, 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, 172 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 645 PreInvPairs, 6196 NumberOfFragments, 231 HoareAnnotationTreeSize, 645 FomulaSimplifications, 1005512 FormulaSimplificationTreeSizeReduction, 5.8s HoareSimplificationTime, 9 FomulaSimplificationsInter, 160786 FormulaSimplificationTreeSizeReductionInter, 4.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 37.3s InterpolantComputationTime, 1778 NumberOfCodeBlocks, 1572 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 3516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1166092 SizeOfPredicates, 106 NumberOfNonLiveVariables, 4933 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 26186/32304 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...